1·1 历史的回顾。我县地处浙江省东部沿海的宁波市,是省重点商品粮县和部省级绿肥种子基地县,也是紫云英著名的优良品种“姜山种”的原产地,仅1985～1990六年间就向省内外提供了350万千克优质种子,据测算,可比安徽种增产鲜草350万吨,折纯氮1.2万吨,对提高和保持土壤肥力,发展畜牧业,作出了较大贡献,“姜山种”也因此闻名南方诸省。 Historical Review. My county is located in Ningbo City, Zhejiang Province, eastern coast of the province is the key grain grain provincial and provincial ministerial green seed base county, is also the famous famous varieties of “Astragalus species” “Jiangshan species” of origin, only 1985 ~ 1990 six years It has provided 3.5 million kilograms of high-quality seeds to both inside and outside the province. According to the calculation, it can produce 3.5 million tons of fresh grass and 1.2 million tons of pure nitrogen in comparison with Anhui. It has made great contributions to raising and maintaining soil fertility and developing animal husbandry. “Jiangshan species ” is also famous for the southern provinces.