黑荆树(Acacia mearnsii)作为短周期工业人工林进行集约经营,施肥是一项重要的增产措施。南方各省一般用于营造黑剂树的山地土壤较瘠薄,加上黑剂树生长快、伐期短,吸收土壤养分多,而只有少数枝叶能形成矿质养分回到土壤。南非试验表明:施一定量过磷酸钙的黑荆树人工林,10年轮伐时,每公顷可增加鲜树皮6t、木材30t。本试验主要探讨N、 Acacia mearnsii is intensively managed as a short-cycle industrial plantation and fertilization is an important stimulation. The mountainous soils commonly used to create the black agent tree in southern provinces are barren, and the black agent tree grows fast with a short cutting period and absorbs more soil nutrients. However, only a few branches and leaves can form mineral nutrients and return to the soil. South Africa test shows: Castration of a certain amount of superphosphate Acacia plantations, 10 years of rotation, per hectare can increase the fresh bark 6t, wood 30t. This experiment mainly discusses N,