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麻豆秧又叫地丁、砂打旺、紫绵草,即直立黄芪,是豆科黄芪属多年生草本植物。主根粗而长,侧根很多,着生大量根瘤。茎由基部分枝,可达三十个以上。株高一米以上。耐寒、耐瘠薄、耐盐碱,抗砂、抗旱性强。它能养地、能沤肥、能做饲草。每百斤鲜草含氮素相当15斤硫铵,含营养物质比一般秸秆高20～25％。经过喂养试验,猪和大牲口都很爱吃,很有发展前途。麻豆秧在我省黑龙港流域砂薄碱地上多有分布。一九七六年张家口地区坝下农科所在万
Hemp seedlings and called D, sand playing Wang, purple cotton grass, that is upright Astragalus, Leguminosae is a perennial herb. The main root thick and long, many lateral roots, with a large number of nodules. Stems branched from the base, up to thirty or more. Plant height of more than one meter. Cold hardy, barren, salinity, sand, drought resistance and strong. It can raise land, fertilize, forage. Each kilogram of fresh grass contains 15 kg of nitrogenous ammonium sulfate, with nutrients than the average straw 20 to 25%. After feeding experiments, pigs and big animals are very loving, very promising. Ma Dou Yang seedlings in the province of Heilongjiang Valley Sandy ground more distribution. Zhangjiakou area in 1976 under the dam of agriculture