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紫云英是我县种植面积最大的冬绿肥,但产种量很低,亩产仅20—30斤。近年来,我们改进了栽培技术,建立了上万亩的留种基地,种子产量普遍提高,有的达到百斤水平。根据27个典型田块的调查,紫云英亩产百斤种子的群体结构是:每亩基本苗26—40万,平均33万;每亩越冬茎枝数37.5—66万,平均51.2万;每亩收获时茎枝数32—48万,平均40万;单株花序6.7—
Aspen is the largest planting area of winter green manure in our county, but the yield is very low, only 20-30 kg per mu. In recent years, we have improved cultivation techniques and established a base of 10,000-mu remaining species. The output of seeds has generally increased, and some have reached the level of pests. According to the survey of 27 typical plots, the population structure of Astragalus mongholicus seeds per kilogram is: 26-40 million mu per acre, with an average of 330,000; the number of overwintering stems per acre is 37.5-66 million with an average of 512,000; Mu harvested when the stem branch number 32-48 million, an average of 400,000; inflorescence 6.7-