羊草草原土壤细菌数量动态与生态因子之间关系的研究

THE STUDY OF RELATIONSHIP BETWEEN THE MOVEMENT OF SOIL BACTERIAL NUMBER AND ECOLOGICAL FACTORS ON THE LEYMUS CHINENSIS GRASSLAND

初步研究了羊草草原土壤细菌的数量动态以及与８种生态因子之间的关系。结果表明：土壤细菌的数量全年只有一个高峰值（２．６７×１０个／ｇ干土）。８种生态因子中，土壤含水量、温度、水解氮、速效钾和活性有机质与细菌数量呈正相关，土壤ＰＨ值、电导率、有效磷与土壤细菌数量呈负相关。主分量分析表明：土壤含水量、温度、电导率和活性有机质是主要影响因子。

This paper preliminary studied the movement of soil bacterial number, and the relationship with 8 kinds of ecological factors. The result indicated: soil bacterial number only appears a biggest value in one year (2. 67×10-7个 individual g-1 dry soil). Among 8 kinds of ecological factors, soil water content, temperature, hydrolyted nitrogen, quick acting postossium and active organic matter have straight relationship with siol bacteria, and have negative relationship with soil pH, electric conduct rate, effective phosphorus. The component analysis indicated that soil water content, temperature, electric conduct rate, active organic matter are principal effective factors.