紫云英是我县一种重要的冬季绿肥.1971年后,全县紫云英种植面积每年都在12万亩以上.1974年高达16.4万亩,占稻田面积46.1%,对于提高土壤肥力,促进粮食增产起了重要作用.但是,近年来紫云英种植面积明显下降,1983年种植面积不到5.0万亩.因此,恢复和发展紫云英种植面积,是我县农业生产上的当务之急.1983年6月我们承担了省绿肥试验示范课题,在团结公社音头大队进行紫云英高产栽培示范.1984年3月27日,由省、地、县、社科 Aspen is an important winter green manure in our county .After 1971, the county planted asparagus annual area of ​​120,000 mu or more in 1974 up to 164,000 mu, accounting for 46.1% of paddy fields, for improving soil fertility, However, in recent years, the area planted by asparagus decreased obviously, and the planted area was less than 50,000 mu in 1983. Therefore, the restoration and development of the area planted by asparagus was the most urgent task in the agricultural production of our county. In 1983 June we assume the demonstration project of green manure experiment in the United Tone group Toudou for high-yielding cultivation of Shiyuning demonstration March 27, 1984, by the provincial, prefectural and county social sciences