Synchronizing Nitrogen and Potassium Supply with Crop Demand to Enhance Nutrient and Water Use Efficiency on Bt. Cotton Hybrid(NSPL-999)

摘要

A field experiment was conducted to assess N and NK split application to synchronize nutrient application with crop demand. Eight timings of application and different dose of N and NK both were taken as different treatments. Timings were planned to supply the fertilizer at different crop growth stages i e., at 10, 30, 45, 60 and 75 DAS. Split application of N and NK did not have any significant effect on plant height (cm), monopodia per plant, sympodia per plant ,boll per plant, boll weight, and G.O.T. (Ginning Percentage). Bolls per plant was affected significantly with different mode of fertilizers application as well as timing of split application. The seed cotton yield did not deviate significantly due to split-cum-basal fertilizer application;however, timings of split application of fertilizers resulted in significant changes in this productivity parameter. The extra net income from F, was only Rs. 2884/ha. over F,. Amongst the timing of split application, S4 and S5 having three splits up to60 DAS proved significantly superior to some of the remaining treatments, seed cotton yield ranged from 21.15 to 21.19 q/ha with extra net income from Rs. 6109 to Rs. 6205 / ha over SI. Other treatments except S7 showed monetary loss from Rs. 900 to Rs.2250/ha. The treatment interactions were found to be significant GMR, and NMR the characters under study.