金合欢属在全世界约有1200多种,是含羞草亚科最大的属,在整个豆科也居第二位。它是一个泛热带的属,大多数分布在干旱或半干旱地区。在北半球至亚热带,包括亚洲和美洲,但只偶尔在欧洲的一些公园出现。在南半球达到暖温带,主要在大洋洲和非洲,原产澳大利亚的超过750种,也有分布至南美洲的。在我国,原产的和已基本引种成功的有18种,主要成分布于北热带和南亚热带,在保持水土,防风固沙,改良土壤,营 Acacia in the world there are about 1200 species, is the largest mimosa subfamily genus, also ranked second in the entire leguminous. It is a pantropical genus, mostly in arid or semi-arid regions. In the northern hemisphere to the subtropics, including Asia and the Americas, but only occasionally in some European parks. Reaching a warm temperate zone in the southern hemisphere, mainly in Oceania and Africa, over 750 species native to Australia and also distributed to South America. In our country, there are 18 native species and their basic introductions. The main components are distributed in the northern and southern subtropics. While maintaining the soil and water resources, fixing wind and sand, improving the soil and camping