【摘要】 通过小区试验研究,玉米产量和化肥利用率在不同的施肥技术条件下存在差异。其优化次序为:NPK有机肥>NPK>NP>NK>N>PK>ck;深施NPK有机肥>深施NPK>常规施NPK>薅土浅施NPK>撒施NPK>ck。根据养分平衡法建立了目标产量、空白田产量与土壤养分测定值及相应N、P、K化肥施用量的函数关系,在产前提出N、P、K肥的适宜用量和比例以及相应的施肥技术。更多还原

【Abstract】 Through the plot experimental study,the corn output and the chemical fertilizer use factor in different applies fertilizer technical condition remains after deduction in the difference.Its optimized order is: NPK organic fat >NPK>NP>NK>N>PK+ck;Deeply executes NPK organically is fat >deeply executes the NPK>convention executes NPK>weeds out the earth shallowly executes NPK>scatter NPK>ck.Established the goal output,the blank field output and the soil nutrient according to the nutrient zero-method measures the definite value and corresponding N,P,the K chemical fertilizer executed the amount used the functional relation,in pre-natal proposed N,P,the K chemical fertilizer was suitable the amount used and the proportion as well as corresponding applies fertilizer the technology.更多还原