我市渭北灌区小麦、玉米一年两熟,争时矛盾突出,且有部分麦田晚播形成弱苗.生产中常用氮素化肥促苗,结果造成贪青晚熟,产量不高。为了解决这个问题,我们于1982年秋播进行了晚播小麦施磷试验。试验情况试验设于乾县西天堡。土壤属红油土,含有机质1.209%,全氮0.0942%,全磷0.147%,前作夏玉米,10月12日收获。试验设5个处理 Weibei Irrigation District, wheat and corn two crops a year, when the conflict prominent, and some of the late sowing wheat field to form weak seedlings. Production often use nitrogen fertilizer to promote seedling, the result of late greyness, yield is not high. In order to solve this problem, we conducted a late-sowing wheat phosphorus application in the autumn of 1982. Test conditions Test located in Xixian Fort County. Soil is a red soil, containing 1.209% organic matter, total nitrogen 0.0942%, 0.147% of total phosphorus, before the summer maize, October 12 harvest. Experiment set five treatments