白桦和红松根际土壤养分的林龄分布及季节动态

在相同立地类型组的白桦幼、中和成熟林中各取土壤剖面３￣４块，分别于６、８、１０月进行根际取样化验，以研究白桦和红松根际部土壤养分的林龄分布及季节动态。结果表明：白桦红松林中，白桦与红松根际土壤养分具有互补性特征；根际土壤ｐＨ环境趋向酸碱平衡过程；根际土壤养分、ｐＨ植林龄分布和动态过程中，中龄林起承上启下转换作用。

Age Distribution and Season Dynamics of Root Biochore Soil Nutrition of White Birch-Korean Pine Stand

In the young, mid-age and mature stands, on the same site group, 3-4 experimental plots in each stand were set up. The root biochore sampling of white birch and Korean pine was done in June, August and October. Sample organic matter, pH and other properties were tested and analyzed. In the white birch-Korean pine forest, the soil nutrients at white birch root and Korean pine root has mutual compensation. Acid-base mutual compensation and balance process presents at root biochore of the two species. In the age-distribution and dynamic process of root biochore soil, nutrients and pH value, mid-age tree or stand always act as a convertor connected young stand with mature stand.