小麦花生两熟制一体化施肥氮效应研究

小麦花生两熟制一体化双高产栽培大田N肥试验表明：前茬（小麦）施N不仅小麦增产显著，而且具有较大的后效作用；后茬（麦套）花生施N花生增产显著，而对前茬小麦籽粒无明显增产作用；在前茬小麦培肥地力的基础上，当茬配施一定数量的N肥，有利于充分发挥花生的增产潜力；小麦花生各6750～7500kg／hm2高产田全年需施N263～356kg／hm2，前后两作适宜的分配比为1：0．4～0．55。

Nitrogen effects and balancing application for wheat and peanut in two cropping system

Field experiment on nitrogen fertilizer application to wheat and intercropped peanut showed that:N applied to wheat not only increased the wheat yield, but also produced a great residual effect to peanut (subsequent crop). N applied to intercropped peanut increased peanut yield significant, but little influence on what grain yield. To obtain a higher yield of intercropped peanut, a proper amount N should be applied to peanut. The yearly optimum rate of N for double the high yields 6750~7500kg/ha of wheat and peanut was 263 ~ 356kg/ha and N ratio of wheat to peanut was 1:0 . 4~0. 55.