PJB-2018-310
MITIGATING NITROUS OXIDE EMISSION AND INCREASING MAIZE PRODUCTIVITY THROUGH BEST FARM MANAGEMENT PRACTICES
ABDUL WAHID
Abstract
This research was conducted to mitigate nitrous oxide emission through nitrification inhibitors and increase productivity of maize by using plant growth. Three various treatments such as Urea @ 200 kg ha-1, nitrapyrin @ 200 g ha-1 and gibberellic acid and potash salt (GA-K) @ 60 g ha-1 were applied in different combinations. The application of nitrapyrin with urea and GA-K improved the yield and their components. The maximum increase in the number of grains per cob (400), grain yield (6220 kg ha-1) and biological yield (17205 kg ha-1) was calculated when urea was applied together with nitrapyrin and gibberellic acid as increased the grain yield by 37% and biological yield by 27%. It also enhanced the plant N uptake (189 kg ha-1). Urea treated with nitrapyrin and gibberellic acid improved soil NH4+ for plant uptake and reduced NO3- formation hence reduce the nitrous oxide (N2O) emission. These experimental results suggested that using nitrapyrin (nitrification inhibitor) with urea and gibberellic acid (phyto-hormone) improves the yield and their components of maize crop and reduce the nitrous oxide emission.
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