Effects of Different Nitrogen Fertilizer Synergists on Yield and Nutrients Use Efficiency in Rice
Field experiment was conducted to investigate effects of different nitrogen fertilizer synergists on rice yield and nutrients use efficiency.The results showed that nitrogen fertilizer synergists evidently improved yield of rice by significant increasing of effective panicles and grain number per panicle.The yield increasing effect of dicyandiamide treatment was the best,and its yield reached to 7982.8 kg/hm2.The yield of hydroquinone and compound synergist treatment was 7922.7 kg/hm2 and 7892.2 kg,/hn2 respectively.Nitrogen fertilizer synergists could increase the nutrient content and accumulation of rice and improve the fertilizer use efficiency,N,P and K fertilizer use efficiency was increased by 4.22% ~ 8.44%,3.91% ~7.40% and 2.90% ~ 8.72%,respectively.In this study,N and K fertilizer use efficiency in dicyandiamide treatment was the highest,which reached to 64.21% and 48.45% respectively.
ricefertilizationnitrogen fertilizer synergistfertilizer use efficiencyyield