不同磷肥用量对玉米产量及磷素流失的影响

摘要

利用田间小区长期定位试验, 研究不同磷肥用量对玉米地地表磷素径流损失、玉米产量及磷肥利用率的影响, 研究结果表明, 与常量过磷酸钙处理相比, 过磷酸钙减量10％～30％可降低31.58％～39.47％的磷素地表径流损失量;磷素淋溶损失量减少了13.44％～42.73％;磷肥利用率分别提高了0.6, 1.78和2.89个百分点, 且磷素损失量随磷肥用量的减少而降低, 磷肥利用率随磷肥用量的减少而不断提高.%The corn-Chinese cabbage rotation field plot experiments was conducted to study the effect of different phosphate input on phosphorus loss. The influence of crop yield and fertilizer use efficiency, the results showed that compared with constant calcium superphosphate, calcium superphosphate reduction (10％～30％) could reduce the phosphorus surface runoff loss of 31.58％ to 39.47％; P seepage quantity decreased by 13.44％～42.73％; Phosphate fertilizer utilization ratio increased by 0.6, 1.78 and 2.89 percentage respectively. And P loss along with the reducing of phosphate fertilizer consumption decreasing, phosphate fertilizer utilization ratio increasing along with the reducing of phosphate fertilizer dosage.