一、银合欢的作用北澳大利亚属强季节性降雨型气候,最高雨量出现在夏季(12—3月),土壤普遍养分低,严重缺磷、氮,并缺其它大量元素和微量元素。展兴肉牛业是北澳最基本的产业之一。银合欢(Leucaena,含白头银合欢L.leucocephala)是该产业潜在的饲料资源。由于环境条件的限制,长期以来这里的牧草都是低养值。为了改良牧草和豆科植物的收获与发展,已做了大量的研究工作。许 First, the role of Acacia North Australia is a strong seasonal rainfall climate, the highest rainfall appeared in the summer (December-March), the soil generally low in nutrients, lack of phosphorus, nitrogen, and the lack of other large elements and trace elements. Zhanxing beef cattle industry is one of the most basic industries in North Australia. Leucaena (L. leucocephala) is a potential feed source for the industry. Because of environmental conditions, the pasture has long been low-maintenance value. In order to improve the harvest and development of pasture and legumes, a great deal of research work has been done. Xu