水稻专用缓释复合配方肥增产效果研究

为了筛选出适合当地的缓释肥配方和施用技术，减少肥料用量，增加经济效益，应用测土配方及平衡施肥原理，制成水稻专用缓释复混肥(N:P2O5:K2O=24:8:10)，研究不同施用量对水稻茎蘖动态、产量及氮素效率的影响。结果表明，缓释肥处理因其养分释放的平衡性和长效性，水稻分蘖数、每穗实粒数、千粒重等均明显提高，与常规肥料比较，T1（等氮处理）水稻增产7.06%，T2（等价处理）水稻增产0.66%，T2在减少20%的氮肥用量情况下，仍可微幅提高水稻产量，氮素利用率提高8.16个百分点，环境效益显著。

Effects of Slowed Release Compound Fertilizer on Rice Yield

The slowed release fertilizer (SRF) test on rice was carried for screening the SRF formula of advisable local circumstances, reducing fertilizer amount and increasing economic benefit. The SRF (N:P2O5:K2O=24:8:10) was mixed with coated urea, phosphate and potassium fertilizer in according to the principle of balance fertilization. The effects of different amount of SRF on rice till dynamic development yield and N-absorption were studied. Results showed that the SRF possessed balancing and slow releasing nutrients, the number of productive tillers, grains per panicle and 1000-grain weight improved a lot, and the grain setting rate rose markedly. Comparing with the normal fertilization, T1 (the same amount of nitrogen treatment) rice yield increased 7.06%, T2 (the same input cost of fertilizer treatment) rice yield increased 0.66%. The SRF reduced nitrogen application rates by 20% under the same input cost of fertilizer treatment. The nitrogen use percent of SRF increased by 8.16% compared to the normal fertilization, the environmental profit was remarkable.