商品有机肥在水稻不同施氮水平下的应用效果

[目的]为了验证商品有机肥在水稻不同施氮水平下的应用效果。[方法]通过裂区设计对比试验,研究了不同用量的商品有机肥在水稻不同施氮水平下的应用效果。[结果]施氮255 kg/hm2、商品有机肥9 000 kg/hm2时产量最高。在同一施氮水平上随着商品有机肥施用量的提高,产量递增速度逐步下降。随商品有机肥和氮施用量的增加,水稻有效穗数、千粒重、生育期增加,穗型变小。低氮水平下施商品有机肥可以替代氮的不足,有效减轻水稻病虫害的发生和危害。[结论]增施商品有机肥有利于提高水稻单产。综合考虑江苏省商品有机肥适宜用量为6 750 kg/hm2。

Application Effect of Commercial Organic Fertilizer on Rice trader Different Nitrogen Levels

[Objective] The aim of the research was to verify the application effect of commercial organic fertilizer on rice under different nitrogen levels.[Method] In the comparison experiments with split-plot design,the application effects of different amounts of commercial organic fertilizer on rice under different nitrogen levels were studied.[Result] Under the nitrogen application of 255 ?kg/hm2 and the commercial organic fertilizer amount of 9 000 ?kg/hm2,the yield was highest.Under the same nitrogen level,the increasing speed of yield by degrees was decreased gradually with the increment of application amount of commercial organic fertilizer.As the application amount of commercial organic fertilizer and nitrogen was increased,the number of effective panicles,1 000-grain weight and the growth period of rice were increased,and the panicle type became smaller.Under low-nitrogen level,the application of commercial organic fertilizer could take place of the deficiency of nitrogen and alleviate the occurrence and harm of rice diseases and insects effectively.[Conclusion] Applying commercial organic fertilizer was propitious to increase the yield per unit area.Considering synthetically,the suitable application amount of commercial organic fertilizer in Jiangsu Province was 6 750 kg/hm2.