List of Articles water productivity

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  1 - Assessment of CERES-Wheat Model in simulation of varieties of wheat yield under different irrigation treatments
  زهرا سعادتی معصومه دلبری Ebrahim Amiri مهدی پناهی محمد حسین رحیمیان مسعود قدسی
  The simulation models of yield response to water are expected to play an increasingly important role in the optimization of water productivity (WP) in agriculture. In this study, the CERES-Wheat model was used to simulate of wheat yield response under different irrigati More

  The simulation models of yield response to water are expected to play an increasingly important role in the optimization of water productivity (WP) in agriculture. In this study, the CERES-Wheat model was used to simulate of wheat yield response under different irrigation-cultivar treatments with three irrigation treatments in main plots and Five wheat cultivars in sub plots consisted of C1:C-75-5, C2: C-78-4, C3:C-78-8, C4: C-79-6 and C5: C-79-16 in Mashhad region during the years of 2002-2003 and 2003-2004. According to the results, the relative root mean square error of grain yield simulation by CERES-Wheat model was 7 and 10 % for 2002-2003 and 2003-2004 years, respectively. Because, the relative root mean square error was less than 10 percent, so done well simulation. Also, the root mean square error calculated for grain yield for both years was less than 10 percent of the observed mean. The results are indicating a good match to the simulation results of the model. The value water productivity based on crop evapotranspiration and irrigation water value in I3-C-79-6 treatment has the value highest for both years of 2002-2003 and 2003-2004. Therefore, the noted irrigation management (I3) and wheat cultivar (C-79-6) can be recommended in the study area. The overall findings of this study to confirm the optimal performance of the model CERES-Wheat in the growth process simulation and the water impact on yield in the study area. Manuscript profile
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  2 - Water use efficiency and water productivity in potato genotypes under water stress conditions
  Marjan Samaee Ali Mohammad Modares Sanavi Ahmad Mousapour Gorji Eskandar Zand
  In order to identify sensitivity of different potato genotypes to water stress, a research was carried out as a factorial experiment in a randomized complete block design with three replications in Karaj in 2014 and 2015. Potato genotypes at eleven levels (Agria, Caesar More

  In order to identify sensitivity of different potato genotypes to water stress, a research was carried out as a factorial experiment in a randomized complete block design with three replications in Karaj in 2014 and 2015. Potato genotypes at eleven levels (Agria, Caesar, Savalan, Sante, Marfona, Milva, Picasso, Hermes, Jelli, 397081-1, 397069-2) and irrigation treatments in two levels (stress and control) are conducted. Tape irrigation was done normally and in the early stages of tuber production, watering for stress plots was disconnected and control plots were irrigated in a normal way, after reaching to ninety percent of the soil moisture deficit, irrigation was done again until the soil moisture reached field capacity and irrigation was done normally up to the end of growing season. Combined analysis of data for two years showed a reduction of biological yield, healthy tuber fresh weight, marketable healthy tuber fresh weight, LAIM, dry weight of LAIM, evapotranspiration and water usage in genotypes under the stress compared to the control. WP based on fresh weight of healthy tubers and fresh weight of marketable healthy tubers reduced or showed a tendency to reduction in most of genotypes under the stress. WUE based on the healthy tuber yield and marketable healthy tuber yield decreased under the water stress compared to the control in all genotypes except for 397069-2. The most amount of WP based on fresh weight of the marketable healthy yield was observed in 397069-2, respectively (5.41) and (5) kg/m3 in two years under the stress. Based on results of this experiment, doing of additional researches in order to achieve suitable potato genotypes for planting in actual deficit water conditions of our country according to diversity of planting season, place, climate, quality of seed potato, experts and etc. are recommended. Manuscript profile
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  3 - Analysis of gross value of irrigated agricultural products in Qazvin province based on GVIAP index
  Bijan Nazari mahmoud fazeli mahnoush Jenab
  GDP is one of the most important economic indicators at regional and national levels. Regarding climatic conditions, in most regions of Iran, production without irrigation is not economic. Hence, the analysis of irrigation sector share in total agricultural production a More

  GDP is one of the most important economic indicators at regional and national levels. Regarding climatic conditions, in most regions of Iran, production without irrigation is not economic. Hence, the analysis of irrigation sector share in total agricultural production and estimation of economic value that is associated to irrigation process is necessary. In this research, the gross value of irrigated agricultural products in Qazvin province (garden and annual crops) was calculated based on the methodology provided by the National Center for Statistics of Australia. So, irrigated and rainfed products were analyzed during the period from 2002 to 2016. The results showed, gross value of irrigated agricultural products of province in 2016 was 29491 billion Rials and equal to 95 percent of the total gross value of agricultural products. Irrigated grapes, wheat and tomatoes were rank first to third crops based on GVIAP index with 20%, 8%, 7% of gross value of irrigated agricultural productions in province. Also, based on the amount of consumed water by the products, the share of each cubic meter of irrigation water in the gross value was calculated 15259 Rials. Analysis of water use pattern showed that alfalfa with 5% share in gross value has the highest share in water use pattern (18%). In order to mitigate the economic consequences of water shortage in the agricultural sector, consideration of the GVIAP index and water use pattern can be recommended. Manuscript profile
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  4 - Sustainable development of cropping pattern based on optimal irrigation scheduling in real time (Case study: Shoushtar plain)
  Saeb Khoshnavaz
  On-time information and real time decision-making are effective factors in the process of water management in the farm. Therefore, in the present study, a real-time decision support system has been developed for the irrigation scheme of Mian-Ab irrigation network in Sho More

  On-time information and real time decision-making are effective factors in the process of water management in the farm. Therefore, in the present study, a real-time decision support system has been developed for the irrigation scheme of Mian-Ab irrigation network in Shoushtar plain with 24 sub-sets of cropping pattern and results are compared with existing pattern. To increase the accuracy of modeling, including soil water balance, crop production and root growth, a one-day time step is considered by replacing real-time data. For this purpose, the Particle Swarm Optimization Algorithm (PSOA) is used to maximize the net benefit of a growing season. The results showed that the optimal economic efficiency of water was obtained for tomato by 92500 IRR/m3. Its yield production also has increased more than 3000 kg/ha in an optimal strategy with a 35 percent reduction in water consumption. Furthermore, critical periods of crop water requirement was between the maximum canopy cover and the start of senescence. Crops like wheat, barley, and rapeseed which their conopy coverage decrease after senescence stage, are more compatible with deficit irrigation. Manuscript profile
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  5 - Simulation of growth and yield and evaluation of rice production productivity under irrigation management and planting date using Aquacrop model
  Pooya Aalaee Bazkiaee ‌‌‌‌Behnam Kamkar Ebrahim Amiri Hossein Kazemi Mojtaba Rezaei Soheil Akbarzadeh
  In order to evaluate the Aquacrop model and investigate the productivity of rice production under irrigation management and planting date, a split plot experiment based on a randomized complete blocks design with three replications was carried out on a local cultivar (H More

  In order to evaluate the Aquacrop model and investigate the productivity of rice production under irrigation management and planting date, a split plot experiment based on a randomized complete blocks design with three replications was carried out on a local cultivar (Hashemi) in Rice Research Institute of Iran, in Rasht during 2016-2017. Irrigation interval was considered as the main factor in four levels including full flooding, 5, 10 and 15 days irrigation intervals, and transplanting date was assigned to subplots at three levels (April, 21st, May, 11th and May, 31st). Simulated and observed values of grain yield and biological yield were evaluated based on coefficient of determination, T-test, root mean square error (RMSE), Model efficiency (EF), mean bias error (MBE) and normalized root mean square error (RMSEn). The results showed that normalized root mean square error of the grain yield and biological yield were 9% and 5%, respectively. Based on the productivity and reduction in the yield of rice, flooding irrigation was the most efficient in April, 21th planting date. According to the correlation coefficient upper than 0.7 and Model efficiency upper than 0.6, the AquaCrop model had a good accuracy in simulating grain yield and biological yield, therefore AquaCrop model can be used to support the results of experiments under irrigation management conditions and different planting dates. Manuscript profile
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  6 - Measurement of Water Consumption of Promising Rice Cultivars Using Mini-Cylindrical Lysimeters in Amol City
  Saeed Hosseini Ali Bagheri Reza Asadi Davod Akbari nodehi
  10.30495/wsrcj.2023.74737.11399
  Background and Aim: Rice is one of the most important agricultural products in the world. Rice cultivation in Iran has great economic and social importance. Mazandaran province is one of the most important rice production centers in Iran, accounting for 44% of the Iran' More

  Background and Aim: Rice is one of the most important agricultural products in the world. Rice cultivation in Iran has great economic and social importance. Mazandaran province is one of the most important rice production centers in Iran, accounting for 44% of the Iran's rice production. Due to the high consumption of water in the agricultural sector, the optimal use of water resources in agriculture is necessary.The water required by rice is directly related to evapotranspiration. The most reliable method of calculating evapotranspiration is using a lysimeter. The purpose of this experiment is to calculate the evapotranspiration of different varieties of rice using mini-lysimeters and to introduce the best variety for cultivation. Method: The experiment was conducted as randomized complete block design with three replications and eleven treatments, at Rice Research Institute of Iran (Amol) during the 2020. The treatments included different rice varieties in 11 levels T1: AR2, T2: AR6, T3: AHS, T4: DAH, T5: 1117, T6: 952, T7: 956, T8: E104, T9: S715, T10: Tarom, and T11: Shiroodi. Mini lysimeters with open bottom and closed bottom had a diameter of 60 cm and a height of 50 cm. Field soil was sampled from 0 to 30 cm depth and studied in the laboratory. The date of transplanting was similar in all rice cultivars The planting density of seedlings was 20×20 cm and 7 seedlings were placed in lysimeter. The lysimeters were placed 6 cm above the ground in the soil. The seeds were planted in a treasury and the seedlings were placed in the lysimeter after 30-35 days (after 3-4 leaves and height 25-20 cm). Water management in lysimeters was in the form of flooding (5 cm). Finally, variance analysis of the obtained data was done using SAS software and the mean of the treatments were compared through the least significant difference (LSD) test at 5% probability level. Results: The results showed that different varieties and lines of rice was effective on infiltration, evapotranspiration, yield, water consumption and were statistically significant at 1% level of probablity. The highest and lowest evapotranspiration with averages of 4938.7 and 3747 m3/ha belonged to T9 and T5 treatments, respectively. The highest and lowest yields with averages of 7773.7 and 2938.1 kg/ha belonged to T8 and T6 treatments, respectively. The highest and lowest values of deep percolation were observed with averages of 303.3 and 185.3 mm in T9 and T5 treatments, respectively. The highest and lowest amount of applied water with averages of 9972 and 7600.3 m3/ha belonged to T9 and T5 treatments, respectively. The highest and lowest water productivity with averages of 0.98 and 0.3 kg/m3 were related to T8 and T9 treatments, respectively. The results showed that the length of the plant growth period was different in the tested cultivars and lines and it was effective on the amount of water consumption.. Conclusion: Finally, in the normal conditions of the region, line E104 is introduced as the best treatment due to the production of maximum grain yield, while in water shortage conditions, the line 1117 is recommended for planting due to less water consumption. Manuscript profile
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  7 - Investigating Irrigation Management in Different Stages of Growth on the Yield and Yield Components of Lentils under Different Levels of Iron Nano-Chelate in Deylaman Region
  Sayyed Mostafah Sadeghi Ali Abdzad Gohari
  10.30495/wsrcj.2023.69377.11323
  Background and Aim: The increase in water consumption in agriculture has caused irrigation management to be studied by experts and researchers in recent years. Water is one of the most important factors limiting the production of lentils. Increasing water productivity t More

  Background and Aim: The increase in water consumption in agriculture has caused irrigation management to be studied by experts and researchers in recent years. Water is one of the most important factors limiting the production of lentils. Increasing water productivity through the application of deficit irrigation methods is one of the important topics in the production of this crop. One of the important needs in agricultural planning is to identify the plant's nutritional needs. Iron is one of the essential elements of low consumption and low mobility that plants need the most among micronutrients. Therefore, the present study was conducted with the aim of investigating the irrigation management and iron nano-chelate on the yield and yield components of lentils in Guilan province.Method: The present experiment is conducted as a split-plot in the form of a randomized complete block design in three iterations in the Deylaman region. The main factor includes four levels namely without irrigation (rainfed), irrigation in the flowering stage, irrigation in the pod formation stage, and irrigation in the flowering and pod formation stage (full) and the sub-factor includes fertilizing nano iron chelate solution during flowering, pod formation time, flowering and podding time and, pre-ripening.Results: The findings of the research demonstrate that the effect of irrigation management and the influence of nano-chelate on grain and biological yields are significant at the level of 1 percent. As a result of irrigation management, the highest grain and biological yields are observed in the flowering and podding stages under irrigation conditions with an average of 1457 and 4380 kg.ha-1, respectively. At different levels of iron nano-chelate fertilizer, in the flowering and podding stage and fertilization in the pre-ripening stage, the highest grain yield is with an average of 834.2 and 861.7 kg.ha-1, respectively, and the maximum biological yield with an average of 3317.4 and 3228.6 kg.ha-1, respectively.Conclusion: With full irrigation, the number of main branches, the number of full pods per plant, and the biological and grain yields increases, and spraying solution of iron nano chelate fertilizer improves the number of nodes in the stem, and the number of full pods in the plant and rises the biological yield. Therefore, full irrigation and use of iron nano chelate fertilizer during the flowering and podding stages are recommended for the local lentil plant in the study area. Manuscript profile
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  8 - Analysis of economic water and nitrogen productivity in alternate furrow irrigation for canola production
  Arash Tafteh Ali Reza Sepaskhah
  Conservation of soil and water resources in Iran is of great importance for crop production as well as for environment protection. Due to limited soil and water resources in Iran, new methods that can optimize the use of water and fertilizers for crop production are ver More

  Conservation of soil and water resources in Iran is of great importance for crop production as well as for environment protection. Due to limited soil and water resources in Iran, new methods that can optimize the use of water and fertilizers for crop production are very important. In this study, the alternate furrow irrigation which is a relatively new method for reducing irrigation water for canola production was investigated. In this study, three irrigation methods including ordinary furrow (OF), variable alternate furrow (VAF) and fixed alternate furrow (FAF) were investigated. In each method, four different nitrogen fertilizer treatments with 0, 100, 200, and 300 kg/ha was applied. The results indicated that the best economic productivity of water usage was obtained in the VAF method with 200 kg/ha nitrogen application. Consequently, this treatment can be recommended for canola production in the studied area. Manuscript profile
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  9 - Determination of effective parameters on climate production functions for rainfed barley and sensitive analysis at cold and semi-cold regions of Lorestan province
  Alireza Tavakoli Abdolmajid Liaghat Amin Alizadeh
  Identifying of effective parameters and planning for their management and coordinating agronomic operation with trend changes of effective parameters leads to improving production baseline and prediction for future. Plant growth and crop production under rainfed is a fu More

  Identifying of effective parameters and planning for their management and coordinating agronomic operation with trend changes of effective parameters leads to improving production baseline and prediction for future. Plant growth and crop production under rainfed is a function of changes in climatic factors. In order to determination of climate-yield production functions, analyzed eight crop seasons data (1998-2006) of 25 climate parameters and rainfed barley grain yields of four cold and semi-cold regions of Lorestan province. These regions were including Aleshtar, Khoram-Abad, Aligodarz and Boroujerd. By path analysis method, correlation coefficient separated to direct and indirect effects. Results showed that in local and common models of production functions, the role of crop season vapor pressure deficit is very important. The local models necessary small input data but common model need more input data. Rain water productivity of all regions determined for eight crop seasons, and amounts of maximum, minimum and average of rain water productivity were 0.3, 0.15 and 0.224 kg per cubic precipitation, which its average was 6 percent lower than national average (0.239 kg.m-3). The maximum temperature, sunshine, absolute maximum temperature and crop season vapor pressure deficit parameters were the most sensitive parameters on grain yield prediction. We conducted the climate-yield models are useful tools to predict rainfed barley yield and so to assist managers and farmers for making decisions in rainfed agronomic activity under climate parameters changes.  Manuscript profile
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  10 - تعیین میزان بهره‌وری آب در زراعت کلزا در استان لرستان
  بهمن فریدونی مریم قربانی یداله یوسفی فرد
  کمبود آب به عنوان فاکتوری محدودکننده رشد و توسعه­ی پوشش گیاهی برای مناطق خشک و نیمه خشک به عنوان یک محدودیت ذاتی برای این اقلیم­ها به شمار می­آید. با توجه به خشکسالی­های متعدد در دو دهه اخیر در استان لرستان و همچنین مصرف بیش از حد آب در بخش کشاورزی باعث More

  کمبود آب به عنوان فاکتوری محدودکننده رشد و توسعه­ی پوشش گیاهی برای مناطق خشک و نیمه خشک به عنوان یک محدودیت ذاتی برای این اقلیم­ها به شمار می­آید. با توجه به خشکسالی­های متعدد در دو دهه اخیر در استان لرستان و همچنین مصرف بیش از حد آب در بخش کشاورزی باعث شد که مسئله بهره­وری آب در بخش کشاورزی در این استان مهم و نیازمند بررسی­های متعددی باشد. منابع آب در دنیا دارای محدودیت بوده و به علت افزایش جمعیت و تقاضای غذا، مصرف آب برای تولید محصولات کشاورزی نیز افزایش خواهد داشت. از طرفی با توجه به تجارت آب مجازی که به عنوان راهکاری نوین به منظور مقابله با کم آبی مطرح است، تولید محصولاتی که با نیاز آبی زیاد تولید می­شوند، در مناطقی که با بحران آب مواجه هستند معقول به نظر نمی­رسد. یکی از راهکارها برای بالا بردن کارآیی مصرف آب در بخش کشاورزی بالا بردن بهره­وری فیزیکی محصولات زراعی می­باشد. به همین علت تحقیقی در سال زراعی 96- 95 در شهرستان­های خرم آباد، دوره چگنی و کوهدشت برای بررسی میزان بهره­وری فیریکی آب و حجم آب مصرفی در کشت کلزا انجام گرفت. نتایج این تحقیق نشان داد که میانگین نرخ بهره­وری فیزیکی آب در شرایط مدیریتی بهره­برداران تحت پوشش پروژه، برای محصول کلزا برابراست با حداقل 5/0 و حداکثر 67/0 کیلوگرم بر مترمکعب و میانگین 613/0 کیلوگرم بر مترمکعب و میانگین حجم آب مصرفی در طول فصل رشد آن در شهرستان­های خرم آباد، دوره چگنی و کوهدشت به ترتیب برابر است با 3588 و 2971  و 3428متر مکعب در هکتار می­باشد. Manuscript profile
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  11 - بررسی مبادله آب مجازی و تأثیر آن بر بهره وری آب در اراضی تحت پوشش شبکه آبیاری و زهکشی میاناب شوشتر
  افشان فارغ زاده اصلان اگدرنژاد
  آب اولین و اساسی ترین عامل محدود کننده تولید محصولات کشاورزی است و بدون شک، بحران آب به عنوان یکی از چالش های بین المللی مورد توجه دولت ها و جوامع بشری می باشد. با توجه به اینکه آب مجازی برای اولین بار به عنوان راهی برای مقابله با کمبود آب در کشورهای دارای منابع آب محدو More

  آب اولین و اساسی ترین عامل محدود کننده تولید محصولات کشاورزی است و بدون شک، بحران آب به عنوان یکی از چالش های بین المللی مورد توجه دولت ها و جوامع بشری می باشد. با توجه به اینکه آب مجازی برای اولین بار به عنوان راهی برای مقابله با کمبود آب در کشورهای دارای منابع آب محدود مورد استفاده قرار گرفت، لذا کشورهای با آب کم باید به واردات مواد غذایی از کشورهای دارای آب فراوان به منظور صرفه جویی در منابع محدود آب بپردازند. بنابراین آب مجازی می تواند در کشورهای کم آب مانند ایران به عنوان راهکاری برای کاهش فشار بر منابع آب در نظر گرفت. لذا توجه به مقوله آب مجازی به عنوان راهکاری جهت مدیریت مصرف آب در شرایط بحرانی کم آبی می تواند ضروری به نظر برسد. هدف از این پژوهش، محاسبه آب مجازی محصولات کشاورزی بوده و پس از شناسایی جریان آب مجازی و برآورد میزان آن، شاخص های میزان صادرات، واردات و خالص مبادله آب مجازی، بهره وری، شدت مصرف آب در منطقه و وابستگی یا خودکفایی منطقه به آب مورد نیاز بررسی شده است. محصولات مورد مطالعه در این پژوهش، صیفی جات شامل خیار و گوجه فرنگی بوده که اطلاعات مورد نیاز از سال 1390 الی 1396 جمع آوری شد. نتایج نشان داد، صیفی جات جزء محصولات کم مصرف با بهره وری آب بالا قرار دارند و صادرات آب مجازی در مقایسه با واردات آب مجازی بیشتر بوده و خالص آب مبادله آب مجازی 32/7838- مترمکعب در هکتار است. همچنین شدت وابستگی به آب در منطقه پژوهش در طول دوره افزایشی بوده و در کل از نظر تأمین آب مورد نیاز برای تولید محصولات کشاورزی (خیار و گوجه فرنگی) خودکفا می باشد. Manuscript profile
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  12 - محاسبه بهره‎وری فیزیکی و حجم آب مصرفی در کشت چغندرقند و تاثیر آن بر آب‎های زیرزمینی در شرایط خشکسالی شهرستان کوهدشت
  منوجهر دانش زاد یداله یوسفی فرد مریم قربانی
  کمبود آب در آینده، دنیا را با بحران مدیریت منابع آب مواجه خواهد کرد. از دیرباز مصرف آب در بخش کشاورزی، به عنوان بزرگ‎ترین متقاضی آب، ذهن خیلی از دست اندرکاران حوزه­های اقتصادی، اجتماعی و سیاسی را به خود مشغول نموده است که  به دنبال آن  پژوهش­هایی د More

  کمبود آب در آینده، دنیا را با بحران مدیریت منابع آب مواجه خواهد کرد. از دیرباز مصرف آب در بخش کشاورزی، به عنوان بزرگ‎ترین متقاضی آب، ذهن خیلی از دست اندرکاران حوزه­های اقتصادی، اجتماعی و سیاسی را به خود مشغول نموده است که  به دنبال آن  پژوهش­هایی در زمینه  بهره‎وری و کارایی آن انجام گرفته شد. از طرفی با توجه به خشک‎سالی های متعدد در دو ده اخیر در استان لرستان  و همچنین مصرف بیش از حد آب در کشاورزی باعث شد که مسئله بهره‎وری آب در بخش کشاورزی در این استان، مهم و نیازمند بررسی های متعددی باشد. به همین علت تحقیقی در سال زراعی 97-96 در شهرستان کوهدشت برای بررسی میزان بهره‎وری فیریکی آب و حجم آب مصرفی در کشت چغندر قند انجام گرفت. نتایج این تحقیق نشان داد که میانگین نرخ بهره­وری فیزیکی آب در شرایط مدیریتی بهره­برداران تحت پوشش پروژه، برای محصول چغندر قند برابراست با 06/6 کیلوگرم بر مترمکعب و حجم آب مصرفی در طول فصل رشد آن برابر است با 14841 مترمکعب می‎باشد. در پایان پروژه و با توجه به نتایج به‎دست آمده، توصیه­های دقیق در جهت ارتقای بهره‎وری و کاهش حجم آب مصرفی به  بهره­برداران ارائه گردید. Manuscript profile
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  13 - تعیین بهره وری آب در مزارع آبی اندیمشک خوزستان
  ایمان هرمزی نژاد
  با محدود شدن منابع آبی و اثرات تغییرات اقلیمی‌ در چند دهه اخیر و همچنین افزایش نیاز بخش‌های صنعت، شرب و محیط زیست، مصرف آب در بخش کشاورزی به عنوان مصرف‌کننده اصلی منابع آب، باید به نفع سایر بخش‌ها کنترل شود. در این راستا، تعیین و تحلیل شاخص‌های بهره‌وری آب می‌تواند راهک More

  با محدود شدن منابع آبی و اثرات تغییرات اقلیمی‌ در چند دهه اخیر و همچنین افزایش نیاز بخش‌های صنعت، شرب و محیط زیست، مصرف آب در بخش کشاورزی به عنوان مصرف‌کننده اصلی منابع آب، باید به نفع سایر بخش‌ها کنترل شود. در این راستا، تعیین و تحلیل شاخص‌های بهره‌وری آب می‌تواند راهکار مناسبی جهت سیاست‌گذاری‌های صحیح برای تولید محصولات کشاورزی و غیرکشاورزی در تحصیل حداکثر سود، توسعه پایدار، امنیت غذایی، اشتغال مولد و مواردی از این دست باشد؛ و بدیهی است که نمی‌توان تنها به راندمان آبیاری جهت تعیین مصرف صحیح آب اکتفا نمود. شاخص CPD به عنوان یک شاخص، جهت ارزیابی سالیانه تغییرات بهره‌وری آب کشاورزی در کشور قابل استفاده است. این تحقیق جهت تعیین بهره‌وری آب به وسیله محاسبه شاخص CPD در مزارع تحت کشت غالب منطقه از جمله غلات، سبزیجات، محصولات جالیزی و نباتات علوفه‌ای در منطقه اندیمشک خوزستان در سه سال زراعی 89-88، 90-89 و 91-90 انجام گرفت. نتایج نشان داد که میانگین بهره‌وری آب در پیاز 01/1، گوجه‌فرنگی 94/0، هندوانه 88/0، خیار 84/0 و گندم 76/0 (کیلوگرم بر مترمکعب) می­باشد که در این میان پیاز از نظر بهره‌برداری صحیح‌ترین مصرف آب و گندم  بیشترین مصرف آب را در منطقه مورد مطالعه داشته است. Manuscript profile
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  14 - The Effect of Number of Steps on the Performance of a Cascade Type Solar Still
  Nader Rahbar فاطمه علی پناه
  The purpose of this study is to simulate fluid flow in a weir-type cascade solar still, assuming steady-state and air being the ideal gas and incompressible. The commercial software FLUENT is used for numerical simulation of the process. SIMPLE algorithm is used to calc More

  The purpose of this study is to simulate fluid flow in a weir-type cascade solar still, assuming steady-state and air being the ideal gas and incompressible. The commercial software FLUENT is used for numerical simulation of the process. SIMPLE algorithm is used to calculate the relationship between pressure and velocity. In addition, first order upwind method is applied for separation of displacement and interpolation of pressure. Numerical simulations are performed for Solar Still with four to ten and also with twelve steps. Results of investigations on a Solar Still with different number of steps, in which the height of the steps is constant value of 2 cm, show that increasing the number of steps causes to increase water production up to eight steps. Furthermore, the highest rate of water production was 232 ml/m3hr for solar still with eight steps. Manuscript profile
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  15 - Assessment of Maize Yield (S.C. 704) Responses to Appropriate Planting Date and Deficit Irrigation Using Multivariate Analysis
  Babak Mirshekarnezhad Farzad Paknejad Mohammad Nabi Ilkaee
  10.30495/JCEP.2022.1880528.1614
  Arid and semiarid climate in many parts of Iran dictates the employment of agronomic practices. With this approach, a statistical experiment was set up in split-plot based on randomized complete block design with three replicates during 2015 and 2016 cropping seasons. T More

  Arid and semiarid climate in many parts of Iran dictates the employment of agronomic practices. With this approach, a statistical experiment was set up in split-plot based on randomized complete block design with three replicates during 2015 and 2016 cropping seasons. The experiment took place in College of Agriculture and Natural Resources, University of Tehran. Experimental treatments scheduled on three planting dates: (21st April, 11th May and 31th May) and four irrigation regimes: I100: 100%ETc, I80: 80%ETc, I60: 60%ETc and I40: 40%ETc, based on plant water need. The highest value of water productivity of economical yield (1.19 kg.m-3) and the greatest value of water productivity of biological yield (1.03 kg.m-3) obtained in early-planting date in both years, respectively. Path analysis showed that ear weight with direct effect (1.27) and water productivity of biological yield (0.973), positively contributed to the final yield determination under irrigation regimes I100 and I60, respectively. According to principal component analysis (PCA), the variables such as grain yield, ear weight, biological yield, total number of grain, kernel weight and harvest index as agronomic traits in PC1 and water productivity of economical yield and biological yield as physiological traits in PC2 were accounted for 70% of the final yield variations in total. Due to interactions of planting date and irrigation level on the grain yield (p ≤ 0.01), early planting of grain maize and deficit irrigation management as early season strategies will have great potential to achieve optimal yield and higher water productivity by mitigating early abiotic factors. Manuscript profile
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  16 - Investigating Water Use Efficiency in Agricultural Production in Irrigation and Drainage Networks of Khuzestan Province (Case Study: Northern Karkheh Irrigation and Drainage Network)
  mohammad pirmoradi ali asareh mehdi asadi loor
  Increasing water productivity in agriculture is one of the effective strategies for sustainability of water resources. In this research, irrigation management and water productivity in North Karkheh irrigation and drainage network were evaluated by examining the croppin More

  Increasing water productivity in agriculture is one of the effective strategies for sustainability of water resources. In this research, irrigation management and water productivity in North Karkheh irrigation and drainage network were evaluated by examining the cropping pattern and the use of land use productivity indices, CPD, BPD and NBPD. The results of the study showed that the mean wheat cultivation in the 5 years period of study (2009-2013) increased by 132% compared to the designer's proposed cultivar, while the average barley yield decreased by 470% compared to the design pattern of the designer. Also, the cultivation of fodder plants such as alfalfa and clover has not been welcomed by farmers in the region. The average 5 years of cultivation at the network level was 5924 hectares and the average water consumption per year was 55.5 million cubic meters; if the water required for the designer crop pattern was an average of 86 million cubic meters per year For 6500 hectares. The five-year average CPD index for wheat, as the product with the highest cropping area, was 818 gm-cubic meters, and for spring crop watermelon, as the product that had the highest water intake among cropping patterns It was 2301 grams per cubic meter. The five-year average of BPD and NBPD for wheat was 5870 and 3018 Rials per cubic meter. Manuscript profile
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  17 - Comprehensive Study of the Crop Water Productivity in Bushehr Province, Iran
  Hamzehali Alizadeh Bijan Nazari Abdolmajid Liaghat
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  18 - The rol of fungus Piriformospora indica on improving the grain related parameters of two native and improved rice cultivars under limited irrigation regimes
  ABED AGHAJANI DELAVAR mehdi parsa Hemmatollah Pirdashti Mohammad Kafi Valiollah Babaeizad
  In order to evaluate the rol of mycorrhiza-like fungus Piriformospora indica on rice grain yield and water use efficiency under different limited irrigation regimes a field experiment was conducted in split factorial design with three replicates during 2014. Treatments More

  In order to evaluate the rol of mycorrhiza-like fungus Piriformospora indica on rice grain yield and water use efficiency under different limited irrigation regimes a field experiment was conducted in split factorial design with three replicates during 2014. Treatments were different irrigation methods at three levels (flooding, flooding after falling water depth less than 10 and 20 cm of soil surface) in main plot, two levels of P. indica inoculation (control and inoculation of six days old seedlings) and two rice cultivars (Tarom-Hashemi and Shiroudi) in sub plots as factorial. Results showed that maximum grain yield was obtained in Shiroudi cultivar in flooding (7801 kg/ha), followed by -10 and -20 cm irrigation regimes (5592 and 5575 kg/ha, resectively). This reduction in Tarom-Hashemi cultivar, however, was only significant where falling water depth was less than 20 cm of soil surface and yield loss was about 18 percent as compared to the flooding treatment. Nevertheless, P. indica inoculation in Shiroudi cultivar increased biological yield by 8 %, as compared to Tarom-Hashemi cultivar. Water use productivity and efficiency amounts in limited irrigation regimes was increased significantly in falling water depth less than 20 cm of soil surface treatment by 55 and 57 % , respectively as compared to flooding treatment. In conclusion, results represented a positive effect of coexistence between P. indica and rice plants particularly to ameliorate water deficit negative effects. Manuscript profile
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  19 - Evaluating the Effects of Deficit Irrigation Strategies on Potato (Solanumtuberosum L.) Yield, Tuber Quality and Water use Efficiency
  BIJAN HAGHIGHATI - BOROUJENI
  10.30486/roce.2021.704646
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  20 - Study of Reducing Water Consumption with Irrigation Method in Different Common Bean (Phaseolus vulgaris L.) Cultivars at Shahrekord Region
  Foroud Salehi ALI SOLEYMANI MAJID SHAMS
  10.30486/roce.2019.678270
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  21 - Study of Deficit Irrigation in Different Common Bean (Phaseolus vulgaris L.) Cultivars at Shahrekord Region
  Foroud Salehi Bijan Haghighati-Boroujeni
  10.30486/roce.2018.676041
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  22 - The study assessed effect of irrigation and nutrition management on yield and water productivity of forge and grain maize hybrids (S.c.704) in the north of the country
  R. Rezaei Sokht Abandani M. Rezaei N. Rezaei M. Ebrahimi
  Experimental crop year from 2010-2011 as a split plot in a randomized complete block design with three replications at the Agricultural Research Station, salesperson biokola (Neka) was performed. The main factor for irrigation interval is in four levels of I1, I2, I3 an More

  Experimental crop year from 2010-2011 as a split plot in a randomized complete block design with three replications at the Agricultural Research Station, salesperson biokola (Neka) was performed. The main factor for irrigation interval is in four levels of I1, I2, I3 and I4 (75, 100, 125 and 150mm grouped evaporation from pan evaporation respectively) and nitrogen sub factors are which equal to zero, 200 and 400 urea kg in hectar. Results show that more wet forage performance reached in hectar with 125mm evaporation from pan evaporation in irrigation interval 71230 in hectar, but the most wet forage performance in hectar in gain with 75 and 125mm evaporation from pan evaporation respectively which is equal 19030 and 17810 kg in hectar. Maximum profitability of dry material water usage reached with 125mm irrigation interval in evaporation from evaporation pan is equal to 15.37 kg on mg. Most performance of wet forage reached in wet forage performance according to irrigation + raining under the care of interaction effects in irrigation interval × nitrogen fertilizer for cares with 125mm irrigation interval and 150mm evaporation from evaporation pan with and 184 kg nitrogen usage in hectar which is equal 79200, 13000 kg in hectar and 67.34 and 12.44 percent. Manuscript profile
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  23 - Review effect of system and different amounts of irrigation water on Yield and Yield Components of Potato Plant
  hossain ardalani hossain Babazadeh
  In order to investigate the effects of irrigation water method and water on yield, yield components and potato water productivity of Satina cultivar, a field experiment was conducted as split plots in randomized complete block design with three replications in Damavand More

  In order to investigate the effects of irrigation water method and water on yield, yield components and potato water productivity of Satina cultivar, a field experiment was conducted as split plots in randomized complete block design with three replications in Damavand city. The treatments consisted of Furrow irrigation (F), Drip irrigation (D), one-row irrigation (T1), Two- row irrigation (T2) and irrigation regimes including 30, 50 and 70% water requirement. Statistical analysis showed that the highest yield was obtained by irrigation (T2) with irrigation with 70% irrigation regime (average 22070 kg.ha) and the lowest yield was obtained by irrigation treatments with one-row and Furrow irrigation treatments with 30% irrigation regime respectively (16200, 16410 kg.ha).The highest productivity was obtained by two-row irrigation (T2) with irrigation regime of 30% (9.8 kg.m3) and the lowest productivity with furrow irrigation with 70% irrigation regime equal 2 kg.m3.The result showed that Two-row strip-irrigation method is recommended with a 70% irrigation regime for potato cultivation. Manuscript profile