摘要
通过对黑土区玉米生产氮磷肥配合多年多点次的试验研究，建立产量与肥效的优化模型，优化解析出黑土区玉米生产氮磷配合最佳用量为N172.9kg／ha，P2O557.4kg／ha，氮磷比为3.0:1，可获最佳产量7791.0kg／ha;最佳用量范围内，氮、磷用量相同时，平均每公斤氮可增产玉米14.4kg，每公斤磷可增产玉米16.9kg。磷的肥效比氮好，但氮的增产潜力远比磷大。单施磷可增产玉米734.9kg／ha，而单施氮可增产玉米1597.9kg／ha;氮磷配合最佳用量范围内，氮肥利用率为23.8～37.1％，磷肥利用率为14.2～22.2％;黑土区玉米产量对土壤的依存率平均为68.9％。
An optimization model for yield and fertilizer efficiency was established by many years and sites experimentation of N and P fertilizer combination for maize production in black soil region. The results showed that the optimum rate of N applied was 172.9kg /ha,that of P2O5 was 57.4kg/ha, and the optimum N:P2O5 ratio was 3:1,which could win an optimum yield of 7791.0 kg / ha. Within the range of ophmum rate of fertilizer application 14.4kg and 16.9kg of maize yields could be increased by each kg of N and P separately when the applied arnounts of N and P were equal.The efficiency of phosphorus fertilizer was better than that of nitrogen fertilizer, but the yield-increasing potential of N was far higher than that of P. 734.9kg / ha of maize yield could be increased if only phosphorus fertilizer was applied, but 1597.9kg/ha of the yield could be increased when only nitrogen fertilizer was applied.Under the condition of optimum fertilizer appliction, N fertilizer's efficiency was 23.8-37.1%, and P fertilizer's efficiency was 14.2-22.2%. 68.9% of maize yield was dependent upon the soil.
出处
《土壤学报》
CAS
CSCD
北大核心
1998年第3期392-397,共6页
Acta Pedologica Sinica
关键词
产量
肥效
模型
玉米
氮磷配合
Yield, Fertilizer efficiency, Model, Maize
