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本文通过在吉林省中部两种土壤类型区设立不同N、P、K肥料量级试验,探讨吉林省中部玉米生产中化肥的适宜用量,以期为生产上合理施用化肥和提高肥料利用率提供依据。结果表明,氮磷钾配合施用能够有效提高玉米产量,通过模型优化与经济效益综合分析,建议吉林省中部黑土区玉米的化肥适宜用量为N 145~170 kg/hm~2、P2O569~71 kg/hm~2和K_2O60~81 kg/hm~2,黑钙土区玉米的化肥适宜用量为N 190~200 kg/hm~2、P_2O_569~83 kg/hm~2和K_2O 135 kg/hm~2。
In this paper, we set up different N, P and K fertilizers in two soil types in the central part of Jilin Province to study the appropriate amount of chemical fertilizers in the corn production in central Jilin Province in order to provide a basis for the rational use of chemical fertilizers and fertilizer utilization in production. The results showed that N, P, K combined application can effectively increase the yield of maize. Through the comprehensive analysis of model optimization and economic benefit, it is suggested that the optimum dosage of fertilizer for maize in the black soil area of central Jilin Province is N 145 ~ 170 kg / hm ~ 2, P2O569 ~ 71 kg / hm ~ 2 and K_2O ~ 60 kg / hm ~ 2, respectively. Suitable fertilizers for corn in calcareous soil were N190 ~ 200 kg / hm ~ 2, P2O569 ~ 83 kg / hm ~ 2 and K_2O135 kg / hm ~ 2.