[Objective] The study was to test the optimum quantity of nitrogen fertilizer of Yongxian 975. [Method] According to randomized block arrangement with three replications, there were 5 nitrogen fertilizer treatments an...[Objective] The study was to test the optimum quantity of nitrogen fertilizer of Yongxian 975. [Method] According to randomized block arrangement with three replications, there were 5 nitrogen fertilizer treatments and 1 blank control, the net area of each plot was 13.4 m2. [Result] There was no significant difference between different nitrogen fertilizer treatments. The spike, grain and weight were more coor- dinated and the yield-increasing potential was great when the quantity of pure nitro- gen was 210.0 kg/hm2. The real harvest yield was the highest and the profit was the best, but the utilization rate of fertilizer was poor, plant diseases, insect pests, lodging risk and the ecological burden were increased when the quantity of pure nitrogen was 270.0 kg/hm2. While the quantity of pure nitrogen was 150.0 kg/hm2, the fertilizer utilization rate was the highest, the yield and the economic benefit were high. [Coaclusie,] With comprehensively considering the high and stable yield and the efficiency, the best quantity of nitrogen fertilizer on Yongxian 975 was controlled at about 150.0 kg/hm2. The quantity of pure nitrogen could be increased to 180.0 kg/hm2 when the field fertility was moderate or low. In order to explore its high-yield potential, the quantity of nitrogen fertilizer could be increased to 210.0 kg/hm2 in the high-yield tackling field.展开更多
文摘[Objective] The study was to test the optimum quantity of nitrogen fertilizer of Yongxian 975. [Method] According to randomized block arrangement with three replications, there were 5 nitrogen fertilizer treatments and 1 blank control, the net area of each plot was 13.4 m2. [Result] There was no significant difference between different nitrogen fertilizer treatments. The spike, grain and weight were more coor- dinated and the yield-increasing potential was great when the quantity of pure nitro- gen was 210.0 kg/hm2. The real harvest yield was the highest and the profit was the best, but the utilization rate of fertilizer was poor, plant diseases, insect pests, lodging risk and the ecological burden were increased when the quantity of pure nitrogen was 270.0 kg/hm2. While the quantity of pure nitrogen was 150.0 kg/hm2, the fertilizer utilization rate was the highest, the yield and the economic benefit were high. [Coaclusie,] With comprehensively considering the high and stable yield and the efficiency, the best quantity of nitrogen fertilizer on Yongxian 975 was controlled at about 150.0 kg/hm2. The quantity of pure nitrogen could be increased to 180.0 kg/hm2 when the field fertility was moderate or low. In order to explore its high-yield potential, the quantity of nitrogen fertilizer could be increased to 210.0 kg/hm2 in the high-yield tackling field.
