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紫云英是我县冬季主要绿肥作物,常年种植面积10～15万亩,最高1974年达16.4万亩,占稻田面积46.1%.实践证明,多种和种好紫云英,对增肥改土,培养地力,促进畜牧业的发展和粮食增产起了很大的作用.但近年来由于品种及栽培管理等问题,紫云英鲜草和种子产量普遍下降.鲜草亩产由七十年代的1500多公斤,降到1000公斤左右,种子亩产一般只有10～15公斤,1975年尤溪县650亩留种田平均种子亩产仅6公斤.
ShiYunYing is my county winter main green manure crops, perennial acreage of 10 to 15 acres, the highest in 1974 reached 16.4 million mu, accounting for 46.1% of paddy field area. Practice has proved that a variety and species of asparagus, change of fertilizer Soil, cultivate fertility, and promote the development of animal husbandry and grain production has played a significant role, but in recent years because of species and cultivation management and other issues, the general decline in fresh grass and seed production of milk vetch fresh grass per mu by the seventies Of more than 1,500 kilograms, down to about 1,000 kilograms, seed generally only 10 to 15 kilograms per mu, 650 acres in Youxi County in 1975 to keep farming average seed yield of only 6 kg.