控释肥对双季稻生产及肥料利用率的影响

Effects of Controlled-Release Fertilizers on Yield and Fertilizer Utilization Efficiency of Double Cropping Rice

通过大田试验探索了双季稻种植过程中,在等氮代替常规施肥以及在基肥和追肥分别给予减量的条件下,控释肥对比常规施肥对水稻产量、主要性状、氮肥表观利用率和投入产出的影响。结果表明:与常规施肥相比,施控释肥(等氮或减氮处理)处理的双季稻总产量和年收益均有显著提高,其中总产量增加2.46%~8.11%,收益增加2 070.8~3 074.4元/hm^(2);等氮控释肥处理极显著提高了早稻氮肥表观利用率(提高19.57~24.14个百分点),但降低了晚稻氮肥表观利用率(降低6.56~13.64个百分点)。

Field experiments were conducted to explore the effects of controlled-release fertilizers on rice yield,main traits,apparent utilization efficiency of nitrogen fertilizers,and input-output compared with conventional fertilizers under the condition of equal nitrogen fertilizers instead of conventional fertilizers and reduced base fertilizers and top dressing,respectively.The results show that compared with conventional fertilizers,the total yield and annual yield of double cropping rice treated with controlled-release fertilizers(equal nitrogen fertilizers or reduced nitrogen fertilizers)were significantly increased,with the total yield increasing by 2.46%-8.11%and the economic benefits increasing by 2070.8-3074.4 yuan/hm^(2).The controlled-release fertilizers(equal nitrogen fertilizers)significantly improve the apparent utilization efficiency of nitrogen fertilizers in early-season rice by 19.57-24.14 percentage points,but they reduce the apparent utilization efficiency of nitrogen fertilizers in late-season rice by 6.56-13.64 percentage points.