Quantities of soil microbe and enzymatic activities of Phyllostachy edulis forests under different management in hilly region of central Hunan Province | 湘中丘陵区不同经营目标毛竹林土壤微生物数量与酶活性

Chinese. 研究了湘中丘陵区不同经营目标下毛竹笋用林（Ⅰ）、笋材兼用林（Ⅱ）、材用林（Ⅲ）土壤微生物数量、酶活性及其典范相关关系。结果表明：细菌是土壤微生物的主要类群,所占比例为84.51%～91.31%;真菌数量其次,所占比例为8.39%～14.84%;放线菌数量最少,所占比例为0.17%～0.65%。0～60cm土层细菌、真菌和放线菌数量总体均以笋用林最高,分别为83.68×106、8.27×106和0.26×106 cfu/g。脲酶、蛋白酶、蔗糖酶、过氧化氢酶和多酚氧化酶活性分别为0.008～0.027、0.019～0.026、1.23～2.46mg/g、0.28～0.46mL/g和0.35～1.57mg/g。脲酶活性总体以毛竹材用林最高,蛋白酶、蔗糖酶以及过氧化氢酶活性总体均以笋材兼用林最高,多酚氧化酶活性则以笋用林最高。典范变量系数反映了真菌数量（1.264 5）与典范变量的正相关以及细菌数量（-1.091 8）、蔗糖酶活性（-0.876 7）与典范变量的负相关关系。

English. Based on plot data of shoot utilizing stands（Ⅰ）,shoot and timber utilizing stands（Ⅱ） and timber utilizing（Ⅲ） of Phyllostachy edulis forests located at the hilly region of central Hunan,quantities of soil microbe,enzymatic activities and their canonical correlation analysis（CCA） were investigated in the three typical patterns of management.Results showed that bacterium was the major kind of the total soil microbe with the highest proportion of 84.51%-91.31%,followed by fungus and actinomyces with the proportion of 8.39%-14.84% and 0.17%-0.65%,respectively.Within 0-60 cm soil layers the highest quantities of bacteria,fungi and actinomycetes occurred in type Ⅰ that were 83.68×106 cfu/g,8.27×106 cfu/g and 0.26×106 cfu/g,respectively.The variable activities of soil urease,proteinase,sucrase,catalase and polyphenol oxidase were 0.008-0.027 mg/g,0.019-0.026 mg/g,1.23-2.46 mg/g,0.28-0.46 mL/g and 0.35-1.57 mg/g in soil layer of 0-60 cm,respectively.The highest activities of urease appeared in type Ⅲ.Activities of proteinase,sucrase and catalase were the highest in type Ⅱand the highest activities of polyphenol oxidase were in type Ⅰ.Through canonical correlation analysis（CCA）,the canonical variable（U） was positively related with fungus number（1.264 5） and negatively related with bacteria number（-1.091 8）.The canonical variable（V） was negatively related with sucrase activities（-0.876 7）.