小麦套玉米平衡施肥研究初探

通过采用“3414”完全设计方案，对参试肥料因子N、P、K 在小麦套玉米上进行肥效试验，从而获得本县不同农田等级种植小麦套玉米的最高产量和最佳经济合理产量施肥量、施肥比例、施肥时期、施肥方法。分析N、P、K三因子之间的主效因和交互效因，构建本县不同肥力水平农田（不同农田等级）小麦套玉米的施肥配方，为肥料配方和推广测土配方施肥技术提供科学的依据。研究结果：本地区与该试地验肥力相当的中产田可按照上述经济合理产量的施肥量进行小麦套种玉米生产。每公顷应施：纯N=571.23 kg P2O5=121.38kg、 K2O=68.6kg，氮磷钾比例为N：P2O5：K2O=8.3：1.77：1。

A Primary Research on the Balanced Fertilizer in Interplanting Corn with Wheat

Use the ＂3414＂ completely design project, to test the wheat set corn planted mode of N, P, K fertilizer efficiency. Obtained the highest maize yield and the best economical production of fertilizer, the proportion of fertilizer, fertilizer application period, and the method of fertilization in different farmland grades of wheat set corn planted mode in Yongning County. Analyzed the N, P, K main factor and interaction factor to build the fertilizer formula of wheat set corn planted mode in different level of fertility farmland （different farmland level） in Yongning County, and provided a scientific basis for the fertilizer formula and soil testing fertilization technology.The results： Compared with the high-yield field and the middle field, the highest production of wheat set corn planted mode need to use fertilizer： pure N 577.4 kg, P2O5127.5 kg, K2O 69 kg per hectare, in this condition could have more than 12110.1 kg/hm^2 production. The NPK ratio were N ：P2O5：K2O =8.3：1.85：1. The most reasonable economic output and fertilizer should be 12118.4 kg production per hectare and required： pure N 571.23 kg, P205 121.38 kg, K20 68.6 kg, NPK ratio were N： P2O5：K2O = 8.3：1.77：1.