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从七十年代中期开始,我们组织市内各县进行绿肥追施发草肥试验,七十年代末期大面积示范,八十年代初期大面积推广。从1979到1984年6年中,我市绿肥追施发草肥共413.1万亩,占冬绿肥掩青利用面积的40％。1984年应用面积最大,追施发草肥达95.58万亩,比1983年追肥面积扩大5.1％。 绿肥追施发草肥的增产效果十分显著。据我市大量试验统计,绿肥每亩追施标准氮肥20斤,紫云英可增产鲜草1153.2～2300斤,平均增产1778.6斤,
From the mid-1970s, we organized various counties in the city to carry out green manure top-dressing and fertilizer experiments, a large-scale demonstration in the late seventies and a large-scale promotion in the early 1980s. From 1979 to 1984, six years, the city topdressing fertilizer green manure a total of 4,131,000 mu, accounting for winter green manure cover 40% of the area used. 1984, the largest area of application, topdressing grass and grass up to 955,800 mu, more than 1983 top dressing area expanded 5.1%. Green manure topdressing fertilizer production effect is very significant. According to a large number of city statistics, green manure topdressing standard nitrogen fertilizer 20 acres per acre, Astragalus can yield 1153.2 ~ 2300 pounds of fresh grass, an average yield of 1778.6 pounds,