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本文以东北东部山区重要主态系统之一的天然次生白桦林为研究对象,在研究土壤中9种营养元素静态含量的基础上,对其含量动态变化进行了较为详尽的分析讨论。结果表明:(1)土壤各层中,除Cu元素含量外,其它8种营养元素全量含量、6种营养元素速(有)效含量、有机质含量和PH值的变动幅度均以0—20cm土中为最大;(2)土壤0—20cm层次,有机质含量的变动规律与PH值、全量N、速效N、速效P、有效Zn含量动态变化规律基本一致,具有较高的正相关。相关系数均达0.88以上。
In this paper, the natural secondary birch forest, one of the major host systems in the eastern mountainous area of northeastern China, was studied. Based on the study of the static content of nine nutrient elements in the soil, the dynamic changes of its contents were analyzed and discussed in detail. The results showed as follows: (1) The content of 8 kinds of nutrients, the content of 6 kinds of nutrients (effective), the content of organic matter and the pH of all 8 kinds of soil were 0-20cm soil (2) In the 0-20 cm soil layer, the variation of organic matter content was in good agreement with the dynamic changes of pH, total N, available N, available P and available Zn, and had a high positive correlation. The correlation coefficient reached more than 0.88.