论文部分内容阅读
以土壤微生物为研究对象,应用Biolog方法研究4种人工林(白桦、兴安落叶松、红皮云杉、水曲柳)土壤微生物群落对Biolog不同类型碳源底物的利用情况。培养基平均颜色变化率(AWCD)以及微生物多样性指数均为红皮云杉和白桦林型较高,表明二者土壤微生物群落的碳源代谢能力高于兴安落叶松和水曲柳人工林。4种针、阔叶林型土壤微生物群落对氨基酸、羧酸和糖类等3类碳源的利用率较高;而在主成分中有主要贡献的也是这3类碳源,因此认为这3类碳源是导致土壤微生物群落变化的敏感碳源。
Using the soil microorganism as the research object, Biolog method was used to study the utilization of Biolog different carbon substrate in four kinds of plantations (Betula platyphylla, Larix gmelinii, Picea koraiensis and Fraxinus mandshurica). Average color change rate (AWCD) and microbial diversity index of medium were higher in Phrynoccus dioicae and Betula platyphylla, indicating that soil microbial community had higher carbon source metabolic capacity than Larix gmelinii and Fraxinus mandshurica plantations. The soil microbial community of four needle and broad-leaved forest had higher utilization rate of three types of carbon sources, such as amino acids, carboxylic acids and carbohydrates. However, these three types of carbon sources were also the major contributors to the main components. Therefore, Carbon-like sources are sensitive carbon sources that lead to changes in soil microbial communities.