掺混型缓/控释肥对杂交晚稻产量的影响

采用田间小区试验,以不施肥(CK1)和施用等量NPK化肥(CK2)为对照,研究掺混型缓/控释肥对水稻产量的影响.结果表明,各缓释肥处理的产量均高于等量NPK处理.其中,在长沙点中肥力水稻土上,35%聚乙烯醇混聚物(CF2)胶结复混肥+65%废弃泡沫塑料(PS)混聚物包膜复混肥(简称CF2+PS)效果最好,比等量NPK处理增产27.68%,其次是35%高岭土-聚酯胶结肥+65%PS包膜肥,比等量NPK处理增产24.70%;在宁乡点低肥力水稻土上,35%高岭土-聚酯胶结肥+65%PS包膜肥处理效果最好,比等量NPK处理增产37.25%;宁乡试验点各施肥处理的增产效果均高于长沙点,说明土壤肥力越低,肥料的增产率越高;减少20%掺混型缓释复混肥施用量(处理9),仍然比等量NPK处理增产,说明根据作物各生育期对养分的需求比例,将不同时间段释放养分的缓释肥料按比例掺混,效果较佳,节肥、增产是可行的.

Effect of slow/controlled-release fertilizer on yield of late hybrid rice

Field experiment was trialed to study effect of slow/controlled-release fertilizer on yield of late hybrid rice and CK1 was no fertilizer and CK2 was same amount of NPK. The results showed that yields of slow/controlled-release fertilizer treatments were higher than NPK treatment Compared to NPK treatment, in Changsha normal fertility paddy soil, the effect was best for 35%polyethylene alcohol mixing for adhesive (CF2) felted fertilizer+65% wasted foam (PS) mixed and coated fertilizer (for short CF2 + PS) that increased yield by 27. 68% , and the second was 35% kaolin-polyesterfelted fertilizer + 65% PS coated fertilizer and yield increased by 24. 70%. In Ningxiang low fertility paddy soil, the effect was best for 35% kaolin-polyesterfelted fertilizer +65% PS coated fertilizer and yield increased by 37. 25% , effect of increasing yield for treatments in Ningxiang were better than that of treatments in Changsha. The lower fertility of soil and the higher of increasing rate of fertilizer. Compared to NPK treatment, yield was higher when amount of blend slow release fertilizer decreased by 20%. According to crop grow period, the effects of blending slow release fertilizer with different nutrient release period in some percentage were better.