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%.
parastoo moradi; Jafar Asghari; Gholam Reza Mohsen Abadi; Habibollah Samiezadeh
Abstract
To compare the quantity and quality of forge production in intercropping systems with maize, pinto bean and pumpkin, an experiment based on randomized complete block design with three replications was conducted at faculty of agricultural science, University of Guilan, during 2012 growing season. The ...
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To compare the quantity and quality of forge production in intercropping systems with maize, pinto bean and pumpkin, an experiment based on randomized complete block design with three replications was conducted at faculty of agricultural science, University of Guilan, during 2012 growing season. The treatments consisted of maize, pinto bean and naked pumpkin sole cropping, maize – pinto bean and maize – pumpkin double cropping and maize-pinto bean-pumpkin triple cropping . The results showed that the highest forage dry weight produced in triple cropping and the lowest in pinto bean sole cropping. The highest and lowest crude protein productions observed in triple cropping and maize sole cropping systems, respectively. The highest acid detergent fiber (ADF) and neutral detergent fiber (NDF) were observed in maize sole cropping, versus, both were reduced in triple cropping system due to intercropping with pinto bean and pumpkin. The ADF and NDF of maize in triple cropping systems reductions were more than sole cropping systems; therefore, the total digestible nutrients and consumable dry matter were increased. This research showed that the quantity and quality of total forage production of triple cropping systems of maize, pinto bean and pumpkin were significantly superior to the other cropping systems.