美国猪屎豆，是一年生豆科草本植物，我市1992年开始引种，目前已广为种植。据观察，该品种适应性广，具有耐旱，耐瘠薄，抗病力强，注长快，产量高等特点，很适合果园或新开发的山地上套种。是目前较为理想的一种改良山地红黄壤的先锋绿肥作物。一、特征特性美国猪屎豆株型直 American shit beans, annual leguminous herbs, the city started to introduce in 1992, is now widely planted. It is observed that the variety of wide adaptability, with drought tolerance, infertility, disease resistance, long note fast, high yield, it is suitable for orchards or newly developed mountain interplanting. It is the most ideal pioneer green manure crop to improve the mountain red-yellow soil. First, the characteristics of the United States Zhudou bean plant type straight