【摘要】 在东北东部山区,选择对天然白桦次生林进行"栽针保阔"人为干扰后形成的人工红松白桦混交林和天然白桦次生林为研究对象,利用传统统计学,研究分析两林型内表层土壤各养分指标的差异。结果表明,各养分指标在两林型内(除有效磷外),均有显著性差异;除全钾含量在天然次生白桦林比人工混交林的含量稍低,(全钾含量8.07gkg-1小于9.26gkg-1),其他所测的土壤养分指标含量天然次生白桦比人工红松白桦混交林要高。更多还原

【Abstract】 In the eastern mountain area in Northeast of China,selected natural secondary birch forest as a case study. We applied the methods of tradition statistic and the geo-statistics. In this paper it was studied that the heterogeneity of soil nutrients both in the natural secondary birch forest and mixed forest which in natural secondary birch forest through the method of by "plant conifer and reserve broad-leave". The result show that except the total K is lower in natural secondary birch forest than in mixed forest,the others soil nutrients are higher in natural secondary birch forest than in mixed forest.更多还原