The Effect of Applying Phosphate in the Young Alnus cremastogyne Plantation

Satisfactory effect was achieved by applying calcium magnesium phosphate(200g/hole) before planting the seedling of Alnus cremastogyne. When 2-year-old, Alnus plantation's mean height,mean diameter at foot,mean stand volume and mean biomass are 13%～65%,7.6%～37.5%,63%～281%,61%～260% higher than those of the control respectively. The mean biomass of above-ground is 61%～260% more,but the biomass of the underground part is only raised a little bit.So applying phosphate for plantling A.cremastogyne is an effective methods to improve its growth and productivity.