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Open Access Article

1 - Investigating the yield stability of barley promising lines in temperate regions of Khorasan Razavi province
majid taherian hamid tajala hamidreza nikkhah

 The objective of this study was to evaluate genotypes (G), environments (E) and toanalyze genotype by environment (GE) interactions on the seed yield of 20 barleypromising lines by the additive main effects and multiplicative interaction(AMMI) model.The trials wer More

 The objective of this study was to evaluate genotypes (G), environments (E) and toanalyze genotype by environment (GE) interactions on the seed yield of 20 barleypromising lines by the additive main effects and multiplicative interaction(AMMI) model.The trials were conducted at two research stations (Neyshabur and Torogh Mashhad) fortwo successive years (2015-2017). The result’s of AMMI analysis for seed yield indicatedthat the Genotype main effects, environment, and GE interactions as well as two firstinteraction principal components (IPCA1-2) were significant. AMMI biplot was able todistinguish stable genotypes and environments with high and low genotype discriminationability. The genotypes 1 and 10 with higher mean yield than total mean were to be moststable genotypes, while the genotype 19 and 2 with the highest contribution to GEinteraction, were to be the most instable. The result of recommended genotypes based onAMMI analysis showed that the genotypes 18, 9 and 1 were highly adapted to Mashhadand genotype 20 was adapted to Neishabour environments during this study.  Manuscript profile

Open Access Article

2 - Investigating yield and yield components of different faba bean (Vicia faba L.) genotypes at delayed planting dates under Gorgan climatic conditions
fateme sheykh mohamad taghi feyz bakhsh safora jafer node

 To investigate the effect of sowing date on vegetative characteristics, yield and yieldcomponents of faba, 5 faba bean genotypes along with Barekat cultivar (control), a splitplot experiment based on completely randomized design with 4 replications wasconducted at More

 To investigate the effect of sowing date on vegetative characteristics, yield and yieldcomponents of faba, 5 faba bean genotypes along with Barekat cultivar (control), a splitplot experiment based on completely randomized design with 4 replications wasconducted at Agricultural Research Station of Gorgan in 2014-2015. Three sowing datesof 6th of December, 21st of December and 5th of January and Barekat cultivar and 5 largeseeded genotypes of G-faba-8, G-faba-10, G-faba-621, G-faba-9 and G-faba 620 wereassigned to main-plots and sub-plots, respectively. The results of variance analysis showedthat interaction of sowing date ×cultivar was significant for all studied traits except forplant height and tillers per plant. Due to significance of the interaction, it was sliced. Theresults of mean comparison showed that delay in sowing led to significant reduction inplant height, 100 grain weight, green pods and grain yield. Mean genotype yield forsowing dates of 6th of December, 21st of December and 5th of January was 403.17, 346.04and 337.15 g.m-2, respectively. At 5th of January, G-faba-621 ،G-faba-620 and G-faba-10genotype had a higher yield compared to other genotypes. According to the findings,higher yields may be obtained in delayed cropping using genotypes.  Manuscript profile

Open Access Article

3 - Effect of seaweed extract application on reducing chromium toxicity in cowpea (Vigna unguiculata L.)
keyvan esmaeeli omid deghpor reza monem

 In order to investigate the effect of seaweed extract application on the reduction of toxicitydue to heavy metal chromium (Cr) stress in cowpea (cv. Kamran), a pot experiment wasconducted in Shahre rey region in summer 2019. The research was a factorial experiment More

 In order to investigate the effect of seaweed extract application on the reduction of toxicitydue to heavy metal chromium (Cr) stress in cowpea (cv. Kamran), a pot experiment wasconducted in Shahre rey region in summer 2019. The research was a factorial experimentat the basis of completely randomized design with 8 treatments and 3 replications. In thisexperiment, the first factor was Cr stress at two levels including concentrations of 0 and 50mg/kg of Cr from potassium dichromate source (K2Cr2O7) and the second factor was theapplication of seaweed extract (Ascophyllum nodosum) at four levels including noapplication, pre-treatment for 12 hours, two and three stages foliar application at theconcentration of 7 mL/L. According to the results of this study, Cr stress (50 mg/kg)reduced number of pods per plant, number of seeds per pod, 100 seed weight, grain yield,biomass and harvest index. On the other hand, application of seaweed extract improvedthe above traits under Cr stress. In this study, the highest seed yield per plant (38.58 g)was obtained from control treatment with three-stage foliar application of seaweed extractand the lowest grain yield per plant (7.64 g) was recorded in Cr stress conditions with noapplication of seaweed extract. In other words, three-stage foliar application of seaweedextract increased grain yield by 90 and 94% in both non-stress and Cr stress conditions,respectively. Therefore, based on these findings, three-stage foliar application of seaweedextract can be used to improve growth and yield of cowpea under non-stress and Cr stressconditions.  Manuscript profile

Open Access Article

4 - Effect of potassium amount on reducing the effects of salinity stress in Common purslane (Portulaca oleracea L.)
mohamadreza salehabadi mohamad armin matin jamimoeini

 In salt stress conditions, the use of moderating substances such as potassium-containingfertilizers can reduce the negative effects of saline on yield and yield components of crops.The objective of this study was to determine the effect of potassium amount on yiel More

 In salt stress conditions, the use of moderating substances such as potassium-containingfertilizers can reduce the negative effects of saline on yield and yield components of crops.The objective of this study was to determine the effect of potassium amount on yield andyield components of Common Purslane (Portulaca oleracea L.) grown under salt stress.The study was conducted in pot experiments under greenhouse conditions in Sabzevarbranch, Islamic Azad university in 2016. A factorial experiment was carried based oncompletely randomized design with three replication. Factors were: amount of potassium(0. 150 and 300 kg k2O ha-1) as Solopotash form and salinity levels (0, 6, 9 and 12 dS.m-1).The results showed that increasing potassium amount in salt stress conditions increasedthe yield and yield components of Common purslane and the highest plant height, numberof lateral branches, number of capsule per plant, number of seeds per capsule, dry weightof plant, grain yield, potassium content and lowest amount of sodium was obtained byconsuming 300 kg. ha-1. Salinity at 12 dS.m-1 level, 57.75% reduced plant height, 55.75%number of lateral branches, 37.27% capsules per plant, 68.56% seeds per capsule, 67.57%1000 seed weight, 71% plant dry weight, 47.21% grain yield and 41.91% plant potassiumcontent and increased 27.65% sodium content compared to control. In total, the resultsshowed that till 9 dS.m-1 grain yield was not statistically significant and consumption of300 kg.ha-1 was more suitable for reducing the effects of salinity stress.  Manuscript profile

Open Access Article

5 - Effect of Plant Growth Promoting Rhizobacteria (PGPRs) on yield and yield components of Black cumin under drought stress conditions in Shahr-e-Rey region
mohamad amin akbari alireza pazoki

 In order to study the effect of Plant Growth Promoting Rhizobacteria (PGPR) on yield andyield components of Black cumin (Nigella sativa L.) under drought stress conditions inShahr-e-Rey region, an experiment was done as split plot based on completely randomizedblo More

 In order to study the effect of Plant Growth Promoting Rhizobacteria (PGPR) on yield andyield components of Black cumin (Nigella sativa L.) under drought stress conditions inShahr-e-Rey region, an experiment was done as split plot based on completely randomizedblock design with three replications in research farm of Islamic Azad University Yadegare-Imam Khomeini (RAH) Shahre-rey Branch during 2015. In this experiment, irrigation asa major factor in three levels (55, 95, 135 mm evaporation from class A evaporation pan )and methods of PGPRs application as a sub in four levels (seed inoculation, using inirrigation water, seed inoculation + using in irrigation water) were considered. The resultsshowed that drought stress had significant effect on all traits at %1 level of probability, sothat the highest plant height (99/18 cm), number of branches per plant (4.5), capsulesnumber per plant (6), number of seeds per capsule (2.19), 1000 grain weight (18.2 g),grain yield (234.79 kg/ha), biological yield (626.58 kg/ha), harvest index (%42.37) wereconducted in irrigation at 55 mm evaporation from class A evaporation pan. The use ofPGPRs on plant height, number of branches per plant, number of capsules per plant, grainyield, biological yield and harvest index were significant at 1% level of probability. Thehighest amounts of traits were observed in seed inoculation + using in irrigation water. Soit can be stated that the PGPRs application can reduce destructive effects of drought inblack cumin. The seed inoculation + using in irrigation water were the best recommendedtreatment in water deficit stress conditions.  Manuscript profile

Open Access Article

6 - Effect of drought stress, nitrogen resources and plant density on some agro-physiological traits of Sunflower (Haysan variety) in the north of Golestan province
serajodin moezi mohamadreza dadasi hosein ajamnorozi

 The present study was carried out to investigate the effect of drought stress, nitrogenresources and plant density on some agro-physiological traits of Sunflower (Haysanvariety) in the north of Golestan province. This experiment was done as split plot factorialbas More

 The present study was carried out to investigate the effect of drought stress, nitrogenresources and plant density on some agro-physiological traits of Sunflower (Haysanvariety) in the north of Golestan province. This experiment was done as split plot factorialbased on completely randomized design with 3 replication for two consecutive years and27 treatments in 2017 and 2017. Irrigation factor in 3 levels: S1: rainfed, S2: one plantingirrigation stage, S3: three irrigation (planting, flowering and seed filling) as main factorand nitrogen fertilizer resources in 3 levels: N1: 100% urea, N2: 50% urea and 50%nitroxin, N3: 100% nitroxin and plant density in 3 levels: D1: 50000 plants per hectare,D2: 75000 plants per hectare, D3: 100000 plants per hectare were considered as subfactor. The results showed that the highest mean of CGR was obtained in the S3N2 andN3D3 treatments with an average of 26.041 and 22.0300 g/m2, respectively. The highestplant height with values of 155.75 cm and 1252.89 cm was related to S3N2 and S3D3treatments, respectively. The highest number of seeds per inflorescence belonged to S3N2(285.68) the maximum 1000 seed weight with 29.27 g and 26.69 g were gained in S3D3and N1D1 treatments. According to findings, the highest economic yield (192.88 kg/ha )was conducted in irrigation at 3 stages, 50% urea fertilizer consumption + 50% nitroxinand 100,000 plant density per hectare.  Manuscript profile

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