有机肥与无机肥配合施用及氮肥运筹对晚稻产量·农艺性状的影响

Effects of Combining Application of Different Organic Fertilizer and Inorganic Fertilizer and N-fertilizer Operation Method on Late Rice Yield and Agronomic Traits

[目的]探明沿江双季稻区适宜稻草、沼液还田量和化肥施用量下水稻优质高产氮肥运筹技术。[方法]将稻草3 750 kg/hm2和沼液15 000 kg/hm22种有机肥与化肥配合施用,同时结合氮肥不同运筹方式。[结果]施用稻草还田产量高于施用沼液,其增产原因是增加了有效穗和穗粒数。氮肥运筹方式中均以氮肥运筹基蘖穗为5∶3∶2的比例最高。[结论]不同种类有机肥对晚稻产量的影响较大,施用稻草处理产量较沼液处理要高;氮肥的运筹方式对晚稻产量也有影响,具体运筹方式与单施无机肥相似。

[ Objective ] The research aimed to study the N-fertilizer operation technique under the application of straw, biogas liquid with chemic fertilizer in double season rice area along the river. [ Method ] The chemic fertilizer was applied with different organic fertilizer such as straw 3 750 kg/hm2 or biogas 15 000 kg/hm2, and different N-fertilizer operation method was adopted. [ Result] The late rice yield using straw was higher than that using biogas liquid because of the higher effective spike and the number of grain per spike. The best operation ratio of N- fertilizer was 5： 3： 2. [ Conclusion] Different type of organic fertilizer had distinct effects on the late rice yield, and the yield of straw treatment was higher than that of biogas hquid treatment. The operation method of N-fertilizer also had effects on the late rice yield, and the effect using chemic fertilizer was as same as that using organic fertilizer.