donya behruzi; Marjan Diyanat; Eslam Majidi; mohammad Javad Mirhadi; ali shirkhani
Abstract
Drought is one of the most important factors limiting corn production in the world. On the other hand, the use of renewable resources and inputs such as vermicompost is one of the principles of sustainable agriculture. Therefore, in order to investigate the effect of deficit irrigation, chemical fertilizers ...
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Drought is one of the most important factors limiting corn production in the world. On the other hand, the use of renewable resources and inputs such as vermicompost is one of the principles of sustainable agriculture. Therefore, in order to investigate the effect of deficit irrigation, chemical fertilizers and vermicompost an experiment has been performed in the form of split split plots in a randomized complete block design with 3 replications for two years (2017 and 2018) in Kermanshah Agricultural Research and Training Center. Irrigation treatment include optimum, 80% and 60% of water requirement. Chemical fertilizer include 100% and 50% recommended and vermicompost include 0, 2, 4,and 6 ton ha-1 arranged as main plots, sub plots, and sub sub plots, respectively. Results show that leaf area index is decreased from 4.51 to 1.6 from normal irrigation to intense drought stress. The highest yield of fresh forage (82.5 ton ha-1) is obtained in optimal irrigation treatment and combined use of 100% chemical fertilizer and 6 ton ha-1 of vermicompost and the lowest rate (30.1 ton ha-1) is related to 60% water requirement and no use of vermicompost chemical fertilizers. At all irrigation tratments, the percentages of forage protein increase with the use of fertilizers and vermicompost, and the highest percentage of forage protein (10.2%) is obtained in complete irrigation treatment and 100% fertilizer application and 6 ton ha-1 vermicompost. Based on the results in irrigation treatment by 60% of water requirement and application of 50% of chemical fertilizer, application of vermicompost at the rate of six tons per hectare, compared to no application, increases fresh forage by 26.26% and protein by 6.9%.
hossein khoshvaghti; mahdi taj bakhsh
Abstract
In order to investigate the effect of various chelated nano and amino acid fertilizers on grain yield, biological yield, harvest index, oil quantity and quality, starch content and percentage of protein in corn grain, an experiment has been conducted based on a randomized complete block design with 16 ...
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In order to investigate the effect of various chelated nano and amino acid fertilizers on grain yield, biological yield, harvest index, oil quantity and quality, starch content and percentage of protein in corn grain, an experiment has been conducted based on a randomized complete block design with 16 treatments and three replications simultaneously in Urmia University and Ajabshir during the 2017 cropping year. Results show that the highest content of starch (80.66%), protein (12.70%), and harvest index (34.60%) related to NPK nano-chelate fertilizer treatment, the highest amount of oil (4.98%), grain yield (16596 kg / ha), and biological yield (52393 kg / ha) are related to iron amino chelate and the highest weight of 100 grains (36.34 g) is related to zinc nano chelate, which are 22.03%, 30.92%, 23.66%, 25.44%, 50.81%, 33.15%, and 24.65% more than the control treatment, respectively. The use of magnesium amino chelate, micro-mix amino chelate, potassium amino chelate, and NPK nano-chelate increase the amount of saturated fatty acids more than other fertilizers, but Copper nano-chelate, phosphorus amino-chelate, pigeon, and salicylic acid fertilizers increase the content of unsaturated fatty acids by 16.04%, 16.35%, 17.44%, and 20.29%, respectively, compared to the control treatment.