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华北土石山区刺槐和栓皮栎人工林土壤微生物数量和微生物量碳､氮研究

作者：王风芹   出版商：河南农业大学生命科学学院   出版日期：2016 年 5 月
[Objective]In order to provide the theoretical basis for evaluating the effect on soil microbial propertiesand for establishing reasonable sustainable forest management to reduce soil erosion and land degradation,soilchemical properties and microbial biomass of main tree species-Robinia pseudoacacia and Quercus varaibilis in rockymountain area of northern China were studied. [Methods]The chemical properties,microorganism amount,micro-bial biomass carbon and nitrogen in soil of R. pseudoacacia and Q. varaibilis plantations were analyzed. The factorsinfluencing soil fertility were also studied with principal component analysis and stepwise regression analysis. [Re-sults]The results showed that three kinds of main soil microorganisms and microbial biomass carbon and nitrogendecreased with the deepening of the soil depth. The amount of soil bacteria in the R. pseudoacacia plantation was 2.13 - 2. 26 times that in the soil of Q. varaibilis plantation. While the amount of actinomycetes in the soil of Q. vari-abilis plantation was 4. 48 - 6. 05 times that in the soil of R. pseudoacacia plantation. No obvious difference was ob-served between the amounts of fungi in these two kinds of forest soil. The content of nitrate nitrogen,organic matter,available phosphorus and the total amount of microbes,microbial biomass carbon and nitrogen in the soil humus lay-er of R. pseudoacacia plantation were significantly higher than that of Q. variabilis plantation. 
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