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通过17年的长期定位肥料试验,研究了不同施肥制度对肥料利用率的影响,以期为合理施肥提供理论依据。结果表明:N、P、K肥的当季利用率随施肥不同差异较大,施用有机肥的处理作物对N、P、K的利用率高于单施化肥的处理。P肥累积利用率在各个处理中均有明显的增加,表现出极好的残效;除单施N肥处理外,其他处理的N肥累计利用率均呈增加趋势;K肥的累计利用率在施用有机肥的处理上表现出明显的增加趋势,其他处理不明显。
Through 17 years of long-term fertilization experiments, the effects of different fertilization systems on fertilizer utilization were studied in order to provide a theoretical basis for rational fertilization. The results showed that seasonal utilization efficiency of N, P and K fertilizers differed greatly with fertilization. Utilization of organic fertilizers on N, P and K was higher than that of single application of chemical fertilizers. The cumulative utilization rate of P fertilizer increased obviously in all treatments and showed excellent residual effects. The cumulative utilization rate of N fertilizer increased with the application of N fertilizer alone. The cumulative utilization rate of K fertilizer was in the range of The application of organic fertilizer showed a clear upward trend in the treatment, the other treatment is not obvious.