【摘要】 由于土壤养分的变化 ,化肥的增产效应也相应地发生了改变 ,化肥增产率在玉米作物上由1986～ 1987年的 35 .3% ,上升到 2 0 0 0年的 4 7.9%。由于土壤养分的变化 ,在施肥技术上我们采用了施肥参数试验和分区配方的办法 ,推广平衡施肥技术 ,取得了较好的增产效果和经济效益更多还原

【Abstract】 Because of the nutritive change in soil, the relevant changes have taken place in the effect of increasing production of chemical fertilizers. The rate of increasing production of maize crop is risen from 35.3 percent in 1986～1987 to 47.9, percent in 2000.Parameter experiment and prescribing according to plots have been taken in application technology as well as releasing balance applying, which has made better increasing result and economic benefit.更多还原