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近年来,我省绿肥播种面积逐年有所扩大,对粮食增产起了重要作用。紫云英是我省的主要绿肥,播种面积占绿肥总面积80％以上。随着粮食生产上《纲要》的形势要求,紫云英的栽培必须进一步发展。目前紫云英种子单产不高,扩大留种面积对早稻及时移栽、防螟治螟存在一定的矛盾。因此提高紫云英种子产量,已成为当前绿肥生产和科研上的一个重要研究课题。根据我们多年调查和试验材料,为了提高紫云英种子产量,必须做好以下几方面工作:
In recent years, sown area of green manure in our province has been expanded year by year, which has played an important role in increasing grain output. Astragalus is the main green manure in our province, sown area accounts for more than 80% of the total area of green manures. With the requirements of the “outline” of food production, the cultivation of the milk vetch must be further developed. At present, the yield of Asparagus seedlings is not high, so it is contradictory to expand the planting area for timely transplanting of early rice and preventing and controlling stem borer. Therefore, improving the yield of Astragalus sinicus has become an important research topic in the current green manure production and research. According to our years of investigation and test materials, in order to improve the seed yield of Chinese milk vetch, we must do the following work: