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Open Access Article
1 - Multivariate Statistical Analysis to Yield of Canola under Drought Stress and Spraying of Gibberellin and Salicylic Acid
Abbas Maleki Amin FathiBACKGROUND: Drought stress is one of the most critical factors in the reduction of yield among plant growth factors. Salicylic acid is a regulator that plays a vital role in the physiological processes of the plant. Gibberellin is one of the plant growth-regulating horm MoreBACKGROUND: Drought stress is one of the most critical factors in the reduction of yield among plant growth factors. Salicylic acid is a regulator that plays a vital role in the physiological processes of the plant. Gibberellin is one of the plant growth-regulating hormones that have different effects on the growth and development of many plants during growth stages. OBJECTIVES: The purpose of this research is to identify the traits that have a strong and productive relationship with the performance of canola under conditions of drought stress and levels of Gibberellin acid and salicylic acid application. METHODS: An experiment was conducted as a split-split plot based on randomized complete block design (RCBD) with three replications during the cultivation season of 2017-2018 in Darreh-Shahr city, Ilam Province. The experimental factors were four levels of irrigation, including normal irrigation, cut of irrigation in stem elongation, cut of irrigation at the start of flowering. The cut of Irrigation at the beginning of the pod were allocated as main plots. Sub factors and sub-sub factors were two levels of spraying and non-spraying of Gibberellin hormone and salicylic acid, respectively. RESULT: Based on the results of correlation coefficients between the traits, it was determined that all of the studied traits had a significant correlation with grain yield. Investigation of regression coefficients using t-test showed that only the effects of three traits such as the number of flowering branches, 1000-seed weight, and harvest index were significant, but other characteristics in the model had a feeble impact on grain yield prediction. The number of flowering branches and harvest index has a more substantial contribution than other characters in predicting grain yield because one unit of increase causes the grain yield to increase by 42% in the standard deviation scale. CONCLUSION: According to the results, to improve the yield of rapeseed, three at-tributes of 1000 seed weight and number of flowering branches and harvest index have to be emphasized that directly or indirectly affect this trait. Manuscript profile -
Open Access Article
2 - Determination Effect of Mycorrhiza and Vermicompost on Accumulation of Seed Nutrient Elements in Maize ( Zea mays L.) Affected by Chemical Fertilizer
Hadis Karami Abbas Maleki Amin FathiBACKGROUND: Nutrient management is one of the most important factors that affect the growth and production of maize. OBJECTIVES: Current research was conducted to investigate the effect of Mycorrhizas and vermicompost on seed yield, its components and quantities traits MoreBACKGROUND: Nutrient management is one of the most important factors that affect the growth and production of maize. OBJECTIVES: Current research was conducted to investigate the effect of Mycorrhizas and vermicompost on seed yield, its components and quantities traits such as concentration of protein, starch, zinc, potassium and nitrogen of corn seed. METHODS: Current research was conducted via split split-plot arrangement based on randomized complete block design with three replications during the 2016-2017. Main plot included of chemical fertilizer at four level (Control, 33, 66 and 100%) also vermicompost at tow level (nonuse and use of vermicompost) belonged to subplot and mycorrhiza (nonuse and use of mycorrhiza) as a sub-subplot. RESULT: Interaction effect of chemical fertilizer × vermicompost × mycorrhiza had a significant effect on zinc, nitrogen, potassium, starch and protein content. The highest seed yield and its components were obtained from interaction effects of 66% chemical fertilizer × vermicompost × mycorrhiza and the lowest one was for 33% chemical fertilizer × nonuse of vermicompost × nonuse of mycorrhiza, respectively. The highest zinc, nitrogen, potassium, starch, and protein in seed were obtained from interaction effects of 66% chemical fertilizer × vermicompost × mycorrhiza and the least yield and its components obtained from in 33% chemical fertilizer × without of using of vermicompost × nonuse of mycorrhiza, respectively. Vermicompost and mycorrhiza had a positive affect on seed yield and seed quality and seed nutrients had a better status in presence of vermicompost and mycorrhiza. Use of vermicompost and mycorrhiza with fertilizer levels significantly increased nutrient elements uptake, due to the added supply of nutrient and well-developed root system resulting in better absorption of water and nutrient. CONCLUSION: The combined application of mycorrhiza and vermicompost fungi increased yield, its components and increases the absorption of food by the root and ultimately improves growth and nutrient transfer to seed. Manuscript profile
List of Articles Abbas Maleki
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