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经过20年肥料长期定位试验,研究了在等N条件下,不同施肥处理对小麦、玉米产量的影响。结果表明:单施N肥明显减产,NP、NPK配施能增加作物产量,且NPK配施处理的产量水平与N+粪肥处理接近,达到两季产738kg/667m2。
After 20 years of long-term fertilization experiments, the effect of different fertilization treatments on the yield of wheat and corn under equal N conditions was studied. The results showed that the yield of N fertilizer decreased significantly with the combination of NP and NPK, and the yield of NPK was close to that of N + manure, reaching 738kg / 667m 2 in two seasons.