前言冬小麦是河北省播种面积最大的夏收粮食作物,90%以上分布在河北平原上。七十年代以来,小麦生产发展较快,全省现在冬小麦面积占耕地的40%,占粮食作物总播种面积的30%,对提高我省粮食产量起了一定的作用。但同时也存在一些问题:第一,没有合理的明确品种布局类型区,又曾不看条件追求高产,致使品种种植混乱,半冬性品种大量北移,常常受冷害减产;第二,面积的迅速扩大与自然资源的实际情况和生产条件的改善程度不相适应,产量不稳,增产幅度小,投资大,收益小;第三、小麦面积迅速扩大,复种指数迅速提高,致使粮食作物内部,尤其是夏秋之间、粮食与经济作物之间 Preface Winter wheat is the largest summer harvest grain crop in Hebei Province with more than 90% distributed in the Hebei Plain. Since the 1970s, wheat production has developed rapidly. Nowadays, the area of ​​winter wheat accounts for 40% of the total cultivated land in the province, accounting for 30% of the total sown area of ​​food crops, which plays a role in raising the grain output of our province. However, there are also some problems at the same time. First, there is no reasonable and clear type and type of layout area, and once again see the conditions of the pursuit of high-yielding, resulting in the cultivation of varieties of confusion, a large number of semi-winter species northward shift, often cold cut; second, area The rapid expansion has not matched the actual situation of natural resources and the improvement of production conditions. The output is not stable, the yield is small, the investment is large, and the income is small. Thirdly, the area of ​​wheat rapidly expands and the multiple cropping index rapidly increases, Especially between summer and autumn, between food and cash crops