水稻专用控释BB肥增产效应的研究

Effects of controlled release bulk blending fertilizer(CRBBF)on rice yield

应用测土诊断计量平衡施肥原理 ,制成水稻专用Ⅰ型和Ⅱ型控释BB肥。结果表明 ,控释BB肥具有养分释放的平衡性和缓释性 ,可实现水稻整个生育期一次性施肥技术 ,植株N、K含量增加明显 ,水稻分蘖数、有效穗、每穗实粒数、结实率等显著提高。与常规施肥技术比较 ,施用Ⅰ型控释BB肥早稻增产 9.0 %～ 14.6 % ,晚稻增产 4 .3%～ 9.2 % ,肥料养分效率可提高 5 3.2 9%～79 4 7% ;施用Ⅱ型控释BB肥早稻增产 7.5 %～ 12 .1% ,晚稻产量略有增加 ,肥料养分效率可提高17.4 1%～ 2 5 .0 7%。

The controlled release bulk blending fertilizer(CRBBF) was mixed with coated nitrogen and soluble nitrogen, phosphorus, potassium fertilizer in according to the principle of balance fertilization. The CRBBF Ⅰwas applied together with carbonic ammonium, and the CRBBF Ⅱwas spreaded with no other fertilizer in single time basal fertilization. Results showed that the CRBBF possessed balancing and slow releasing nutrients. It is adaptable to single time basal fertilization during whole rice growth. The content of N, K of rice plant increased obviously by applying CRBBF,the number of tillers, effective panicle and filled grain of rice improved a lot, and the grain setting rate rose markedly. Comparing with normal fertilization, the early rice yield increased by 9.02% to 14.57%, and late rice yield increased by 4.28% to 9.17% with application of CRBBF Ⅰ; the early rice yield increased by 7.45% to 12.14%, and late rice yield also improved with application of CRBBF Ⅱ. Fertilizer production efficiency increased by 53.29% to 79.47% and 17.41% to 25.07% respectively with application of CRBB I and CRBB II.