牛膝是苋科多年生革本植物,其根干燥即可供药用,又名怀牛膝、牛夕、怀膝等。全国各地均有分布,年正常需要量约140万公斤。现在均以栽培供药用。主产河南、山东、河北等省。一般亩产达200～400公斤,现市场价12元/公斤,用于腰膝酸痛,筋骨无力等病症。生长习性牛膝是深根系适应较强的植物,喜温暖向阳,土层深厚、高燥的土地,忌重茬。二年生植株结 Achyranthes is a genus of perennial leathery plants, its roots for medicinal dry, also known as Achyranthes, Niu Xi, with knee and so on. All parts of the country are distributed, with a normal requirement of about 1.4 million kilograms. Now cultivated for medicinal purposes. Main production in Henan, Shandong, Hebei and other provinces. General mu produce 200 ~ 400 kilograms, the market price is 12 yuan / kg, for waist and knee pain, weakness and other diseases. Growing habits Achyranthes is a deep root adapted to stronger plants, hi warm sunny, soil deep, high dry land, avoid heavy cropping. Biennial plant knot