陕北渭北冬小麦降水产量关系与补灌时期研究

在分析陕北、渭北地区旱地冬小麦生育期水分盈亏量和不同月份降水自给率地区分异的基础上 ,研究了不同分区典型县旱地降水产量积分回归函数和降水对产量的影响规律 ,确定了陕西丘陵沟壑区和渭北台塬东部冬小麦最佳补充灌溉时期为 :冬前分蘖期和返青、拔节期 ;洛川塬区 :返青、拔节期 ;渭北台塬西部 :越冬期

Relationship between winter wheat production with rainfall and compensation irrigation period in North Shaanxi and Weibei Areas

Based on the analysis of regional features of soil moisture deficit and rainfall distribution with different months of winter wheat growing season in North Shaanxi and Weibei areas,the winter wheat rainfall production integration correction function of typical counties and the effect of rainfall on winter wheat production in different districts are studied.It is concluded that the optimal compensation irrigation period is tillering before winter and reviving jointing stage in the north of Shaanxi hilly area and the east part of Weibei loess tableland,reviving and jointing stage in Luochuan highland,and over wintering stage in the west part of Weibei loess tableland.