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通过 1996和 1998两年田间试验 ,研究了吉林黑土上化肥对玉米的增产效应及肥料利用率 ,得出N肥是主导的增产因素 ,其最佳产量和最佳施肥量分别为 12 738 6kg/hm2 和 2 91 6kg/hm2 ,及 115 42 7kg/hm2 和2 77 8kg/hm2 ;不同N肥用量下肥料利用率分别变化在 32 3%～ 6 4 3%及 35 5 %～ 6 2 2 %之间 ,并根据最佳产量找出最佳利用率分别在 49%和 5 1%左右。
Through two years of field experiments in 1996 and 1998, the effects of fertilizers on corn yield and fertilizer utilization in Jilin black soil were studied. It was concluded that N fertilizer was the dominant factor for yield increase. The best yield and the best fertilization rate were 12 738 6 kg / hm2 and 2 91 6 kg / hm2, and 115 42 7 kg / hm2 and 2 77 8 kg / hm2, respectively. The fertilizer utilization rates varied from 32 3% to 643% and from 35 5% to 62 22% According to the optimal yield, the best utilization rate was found to be 49% and 51% respectively.