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Open Access Article
1 - Isolation and identification of salinity and drought tolerant bacteria from Jiroft agricultural fields
زینب فتوحیان احمد یوسفیDue to the increasing spread of dry lands in different regions of the world, including Iran, it should be adapted to the new conditions and there must be a plan to prevent the development of these lands. Due to the fact that some areas of Jiroft city were affected by dr MoreDue to the increasing spread of dry lands in different regions of the world, including Iran, it should be adapted to the new conditions and there must be a plan to prevent the development of these lands. Due to the fact that some areas of Jiroft city were affected by drought and salinity facoers, therefore they were considered in this study. One of the new ways to cope with salinity in plants and reduce its harmful effects is to introduce salt-tolerant bacteria. In this research, indigenous bacteria resistant to salinity and drought were isolated and identified. The growth rate of isolates at different concentrations of salinity (5%, 10%, 15%, 20%, 25%, 35% and 40%), drought(0.50, -0.15, -0.03, -0.49 and -0.73 MPa), pH and temperature of 50°C was calculated by reading the optical absorption by spectrophotometer. Then, the production of auxin, siderophore and hydrogen cyanide and phosphate solubility of resistant isolates were investigated. A total of 42 soil samples were collected from the salty and dry areas of Jiroft city in the crop year 2019 and of this number of soil amples, 50 bacteria were obtained. From isolates, K4, K10, K12, K14, K15 codes for the Konar-sandal, C18, C10, C11codes for Karim-abad, A2, A3, A4 codes for anbar-abad were resistant to salinity due to their growth up to 40% salt concentration. Also, the K4, K14, K15, and C8 codes had the ability to grow in water potential at -0.73 and resistant to drought. From selective isolates, the isolate C8 had the ability to grow at high pH and C8 and K4 isolates were capable of growing at 50°C. Also, isolate C8 produced the highest amount of auxin among isolates by producing 1.8 μg/ml of auxin and it was the only isolate that dissolved phosphate. The isolates C8 and K14 had the ability to produce cidrofur in isolates. Therefore, according to biochemical and molecular identification of isolate C8, it was Bacillus subtilis as the superior isolate. This isolate was isolated from the Karim-abad region. Manuscript profile -
Open Access Article
2 - The effect of planting date and depth on the yield of potato cultivars in winter cultivation in Jiroft region
محمد رضا بهرام جردی غلامعباس محمدیIn order to investigate the effect of different winter planting dates at two planting depths on the yield characteristics of potato cultivars, an experiment was carried out in the agricultural year of 2017-2016 in the teaching and research farm of Jiroft Branch Islamic MoreIn order to investigate the effect of different winter planting dates at two planting depths on the yield characteristics of potato cultivars, an experiment was carried out in the agricultural year of 2017-2016 in the teaching and research farm of Jiroft Branch Islamic Azad University, in the form of double split plots in the form of randomized complete blocks in four The repetition was executed. The main factor was cultivar (bamboo, Colombo and Sante), the sub-factor was planting depth (10 and 20 cm) and the sub-factor was planting date (21 December, 10 and 30 January). The results showed that the planting dates of Di and Bahman are superior in terms of total yield, yield of large tubers (larger than 55 mm), seed tubers (35-55 mm) and small tubers (smaller than 35 mm). It is significant compared to the planting date of December. By increasing the planting depth from 10 to 20 cm, the total performance and the performance of large tubers increased significantly, and no significant difference was observed in other cases. The amount of total yield was 40.39 tons per hectare and the yield of large tubers was 27.84 tons per hectare in the bamboo cultivar with a statistically significant difference more than the other two cultivars. Investigating the growth and development of plants showed that the earliest time of tuber formation in plants was cultivated in December and the latest in plants was cultivated in December. The number of aerial stems in the plants cultivated in December was also less than the plants in 10 and 30 January. Also, December cultivation did not result in early harvest. Manuscript profile -
Open Access Article
3 - Study the effect of chemical and bio-fertilizers (Azotobacter and Phosphate Barvar-2) on quantity characteristics of Marigold (Calendula officinalis L.)
سهیلا کوره پز محمود آبادی جابر آقا رحیمیTo study the effect of chemical and bio-fertilizers (Azotobacter and Phosphate Barvar-2) on quantity characteristics of Marigold (Calendula officinalis L.) an experiment was conducted in the Jiroft. Field experiment was arranged base on randomized complete block design MoreTo study the effect of chemical and bio-fertilizers (Azotobacter and Phosphate Barvar-2) on quantity characteristics of Marigold (Calendula officinalis L.) an experiment was conducted in the Jiroft. Field experiment was arranged base on randomized complete block design with three replications. Treatments were involved: T1: nochemical, biological as control, T2: 100% NPK, T3: Azotobacter, T4: Azotobacter + 50% NPK, T5: Phosphate Barvar-2, T6: Phosphate Barvar-2+ 50% NPK, T7: Azotobacter Phosphate Barvar-2, T8: Azotobacter Phosphate Barvar-2 + 50% NPK and T9: Azotobacter Phosphate Barvar-2 + 100% NPK. result showed that the signification effect of chemical and bio-fertilizers on height, flowering stem length, stem diameter, number of branches, number of leaf, Fresh and dry weight plant, Fresh and dry weight flower and harvest index. So that most of these traits were obtained from treatment (T8): Azotobacter + fertile phosphate 2 + 50% NPK. Biochemical and chemical fertilizers had a significant effect on the percentage and yield of marigold essential oil. The highest amount of essential oil was obtained from Azotobacter + fertile phosphate 2 treatment. Also, the application of biochemical fertilizers had a significant effect on the number of days to flowering and the lowest time was related to T8 treatment. In general, the results showed that Applying bio-fertilizers (Azotobacter and Phosphate Barvar-2) benefited on growth and generative and yield Marigold. The use of bacteria not only increased yield, quality and early yield, but also reduced the use of chemical fertilizers. Manuscript profile -
Open Access Article
4 - Examining the problems and solutions for managing the use of agricultural pesticides to achieve sustainable development
نجمه عظیمی زاده عباس پرورIn recent years, due to the increase in world population and the need to produce more food, a significant growth in the consumption of chemical pesticides has been seen in developed and especially developing countries. Although chemical pesticides are essential componen MoreIn recent years, due to the increase in world population and the need to produce more food, a significant growth in the consumption of chemical pesticides has been seen in developed and especially developing countries. Although chemical pesticides are essential components of modern agriculture, they are also considered as one of the important sources of environmental pollution. Resistance of pest and disease species and weeds to chemical poisons, poisoning, destruction and severe erosion of soil, water pollution, adverse effect on non-target organisms, threat to human health and destruction of the environment are among the most important effects of these substances. are chemical. In this regard, integrated pest management (IPM) is introduced as one of the protective technologies in sustainable agriculture, which means the correct, logical and principled use of pesticides as a powerful tool along with other methods. Therefore, minimizing the use of chemical poisons, reducing the dose of poisons and using them on time, using selective, non-chemical and environmentally friendly pesticides, and finally introducing and using integrated pest management methods should be on the agenda. This is a way to achieve sustainable development in agriculture. Manuscript profile -
Open Access Article
5 - The effect of different amounts of phosphorus and nitrogen on tuber yield and agronomic traits of potato
مجید زاهدی دهنوئی حسن سرحدی مهدی ثباتی گاوگانیPotato is one of the most important crops in the world. This plant is in the third place after rice and wheat in terms of consumption in the world, for this reason this plant is considered as one of the plants that protect food security. Low soil fertility is the most i MorePotato is one of the most important crops in the world. This plant is in the third place after rice and wheat in terms of consumption in the world, for this reason this plant is considered as one of the plants that protect food security. Low soil fertility is the most important limitation for potato production. Farmers should deal with this problem by using mineral fertilizers that improve soil productivity. Using the right amount of NP fertilizer is the main factor in potato production. A field experiment was conducted in the main cropping season of 2022 and 2023 to investigate the optimal amount of NP on potato tuber yield in Jiroft region. The treatments including four levels of nitrogen (0, 46, 92, 138 kg/ha) and three levels of phosphorus (0, 46, 69 kg/ha) were factorially combined in a randomized complete block design with three replications. The results of the study showed that the use of 92 kg of nitrogen per hectare is recommended in Jiroft. Even if P application does not affect potato tuber yield, 23 kg/ha of P fertilizer should be applied to maintain soil fertility. Manuscript profile -
Open Access Article
6 - Investigating the effect of low irrigation and nitrogen on vegetative structure and morphological characteristics of henna ecotypes in Jiroft region
حسن سرحدی زهرا مختاریIn order to investigate the phenology of henna plant ecotypes with different amounts of nitrogen fertilizer and low irrigation, an experiment was carried out in the form of completely random chopped plots in 4 replications in the field and in the crop year 2018-2019. Lo MoreIn order to investigate the phenology of henna plant ecotypes with different amounts of nitrogen fertilizer and low irrigation, an experiment was carried out in the form of completely random chopped plots in 4 replications in the field and in the crop year 2018-2019. Low irrigation stress is the main factor (100%, 75% and 50% of the plant''s water requirement), nitrogen is the secondary factor (including 50, 100 and 150 kg). Net nitrogen per hectare was investigated at three levels and sub-factors (including Bami, Bushehri and Rudbari) and the results of analysis of variance showed that all three factors had a significant effect on leaf weight, total, dry leaf weight and total dry weight at a statistical level of 1%. With Paying attention to the results of this research and the importance of using drought-resistant varieties and ecotypes using 150 nitrogen per hectare, 9.77 and 2.37 tons, respectively, were determined. Optimum management of fertilizer consumption in order to preserve the environment and increase the effective substance of henna plant cultivated in Bami ecotype under drought stress of 75% water requirement and consumption of 100 kg of nitrogen per hectare and without stress using henna leaf of Bari ecotype with consumption of 150 kg of nitrogen per hectare It is recommended in the same area and conditions. Manuscript profile -
Open Access Article
7 - Impacts of Nitrogen Fertilizer Sources, Amount and Timing on Yield and Yield Components of Potato
محمد رضا بهرامجردیTo obtain the optimum N fertilizer amounts, sources and timing for potato, we conducted an experiment in split plot-factorial form based on randomized complete block designs with 3 replicates in Jiroft city, located in the south of Kerman Province, Iran. In this study, MoreTo obtain the optimum N fertilizer amounts, sources and timing for potato, we conducted an experiment in split plot-factorial form based on randomized complete block designs with 3 replicates in Jiroft city, located in the south of Kerman Province, Iran. In this study, we took into account N sources for the main plots and N fertilizer amount and time for the subplots. As to the N fertilizer consumption timings and the levels, T1 stands for the total consumption of N fertilizer during cultivation, T2 for consumption of 1/2 N at cultivation and the remaining 1/2 simultaneous with the beginning of flowering and T3 for of 1/3 N consumption at planting, 1/3 of N consumption coincided with the soil hilling and 1/3 at the same time as flowering; N rates were of the levels R1:150, R2:200 and R3:250 kg/ha. Sources were considered to be of two levels: S1=urea and S2-ammonium sulfate. According to our results, treatments were significantly different with regard to yields so as to obtain the highest yield from R3 treatment consumption at the rate 26.72 ton/ha, which statistically had no particular difference from R2 treatment with a rate of 23.86 ton/ha. In addition, the highest yield was obtained from the time T2 with the rate 30.83 ton/ha and from the source S1 the highest yield was 27.38 ton/ ha. Regarding such results, the highest yield belonged to the treatment R2S1T2. Manuscript profile -
Open Access Article
8 - Changing the cultivation pattern and providing the growing degree-day for the phenological stages of three types of tropical legumes in the south of Kerman and its relationship with grain yield
محمد حاتمی حسین حیدری شریف آباد حمید مدنی عنایت الله توحیدی نژاد غلامرضا افشارمنشIn order to study the effect of changing the cultivation pattern in providing growth and development temperature in different phenological stages of three types of tropical legumes in the south of Kerman and to investigate the relationship between temperature and seed y MoreIn order to study the effect of changing the cultivation pattern in providing growth and development temperature in different phenological stages of three types of tropical legumes in the south of Kerman and to investigate the relationship between temperature and seed yield, a factorial experiment was conducted in the form of a randomized complete block design with three replications. It was implemented in Jiroft Agriculture and Natural Resources Research Center in 2019-2020. The experimental treatments included three planting dates, 30 Jan, 9 and 19 Feb, and three types of tropical legumes, including tepari or local Jiroft beans, cowpeas, and green mung beans. The results showed that the highest requirement for growth degree-days from planting to germination, from planting to greening and one to five leaf stages in all three planting dates was related to green mung bean. After mung beans, the highest need for growing degree-days in the above stages was observed in Tepari or Jiroft local beans and nightly beans, respectively. In the stages of flowering, pod formation and filling and ripening, the difference between mung beans and two types of beans in the number of degree-days of growth decreased. Although, the delay in planting in all three plants led to a decrease in the supply of growth degree-days from flowering to full maturity, but all three plants had more seed yield in the dates of cultivation than the common planting dates. So that mung bean had the same grain yield on all three planting dates with an average of 770 kg/ha. Tepari beans produced the highest yield in early cultivation, i.e. on 30 Jan, with an average of 2.3 tons per hectare. This legume was associated with a 39% decrease in seed yield on 9 and 19 Feb cultivation dates compared to the first cultivation date. Among the three tropical legumes, cowpea has the highest seed yield with an average of 4.6 tons per hectare and on 30 Jan and 19 Feb there was no difference in production and on the planting date of 9 Feb 26% decrease in seed yield was observed. In general, in the Jiroft region, the date of early winter crops, considering the provision of temperature and humidity necessary to complete the growth and development process and complete the phenological stages for tropical legumes, considering the negative effect of drought on the growth cycle of plants and also Their performance was completely superior to spring cultivation and this finding can be effective in managing the use of air temperature to reduce water consumption in the region. Manuscript profile
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