冀北辽河源不同林龄油松天然次生林土壤微生物生物量及酶活性  

Soil Microbial Biomass and Enzymes Activity of Pinus tabulaeformis Forest with Different Ages in Liaohe River of Northern Hebei

作　　者：高晶[1] 韩海荣[1] 康峰峰[1] 立天宇 宋小帅 赵伟红[1] 于晓文[1] 赵金龙[1] 

机构地区：[1]北京林业大学,北京100083

出　　处：《东北林业大学学报》2015年第9期78-83,共6页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项(201204101)

摘　　要：以冀北辽河源地区不同林龄油松天然次生林为研究对象,研究其土壤微生物生物量碳、氮质量分数,土壤脲酶、过氧化氢酶、多酚氧化酶以及β-葡萄糖苷酶活性随油松林龄的时间变化趋势。结果表明:在生长季期间,土壤微生物生物量碳、氮质量分数,脲酶、过氧化氢酶和β-葡萄糖苷酶活性从5—8月份逐渐增大,然后逐渐减小,但是多酚氧化酶活性则相反,而且酶活性的衰减程度延迟于微生物生物量碳、氮质量分数的;随着油松天然次生林林龄的增加,土壤微生物量碳、氮质量分数,脲酶、过氧化氢酶和β-葡萄糖苷酶活性逐渐增加,而多酚氧化酶活性则减小。相关性分析表明,土壤微生物生物量碳、氮质量分数与脲酶、过氧化氢酶和β-葡萄糖苷酶活性呈极显著正相关,而与多酚氧化酶活性呈负相关。土壤温度和含水率与各指标之间呈极显著正相关性。We studied the temporal variation tendency of soil microbial biomass carbon （ MBC ）, microbial biomass nitrogen （MBN） , activity of urease, catalase, polyphenol oxidase, andβ -glucosidase of Pinus tabulaeformis with different ages in Liao River source region. MBC, MBN, urease, catalase and β-glucosidase in soil of all forest age groups increased gradual- ly from May to August, and then decreased until October. However, soil polyphenol oxidase exhibited the opposite trend. The attenuation degree of enzyme activity delayed than that of MBC and MBN. With the increasing age of P. tabulaeformis forest, MBC, MBN, urease, catalase and fl-glucosidase increased, while the polyphenol oxidase decreased. By correlation analysis, MBC and MBN had a statistically significantly positive correlation with the activity of urease, catalase and β-glu- cosidase. However, there was negative correlation between MBC/MBN and polyphenol oxidase. Soil temperature and water content had a significantly positive correlation with all indices. MBC, MBN and enzymes activity of soil were the biological indices to evaluate soil aualitv of different age groups in P. tabulaeformis forest.

关 键 词：油松天然次生林 土壤微生物生物量 酶活性 

分 类 号：Q148[生物学—生态学] S714.3[生物学—普通生物学]