亚热带常绿阔叶林土壤胞外酶活性对碳输入变化及增温的响应

刘珊杉, 周文君, 况露辉, 刘占锋, 宋清海, 刘运通, 张一平, 鲁志云, 沙丽清

Responses of soil extracellular enzyme activities to carbon input alteration and warming in a subtropical evergreen broad-leaved forest

LIU Shan-Shan, ZHOU Wen-Jun, KUANG Lu-Hui, LIU Zhan-Feng, SONG Qing-Hai, LIU Yun- Tong, ZHANG Yi-Ping, LU Zhi-Yun, SHA Li-Qing

表2 实验前土壤基本理化性质(平均值±标准偏差)

Table 2 Basic physical and chemical properties of soil before the experiment started in 2010 (mean ± SD)

观测项目 Observation item 测定值 Value 酸碱度 pH 4.25 ± 0.05 容重 Bulk density (g·cm-3) 0.54 ± 0.02 总孔隙度 Total porosity (%) 71.7 ± 2.0 土壤最大持水量 Maximum water capacity of soil (%) 119.1 ± 6.0 有机质含量 Organic matter content (g·kg-1) 175.1 ± 11.7 总氮含量 Total nitrogen content (g·kg-1) 7.18 ± 0.34 碳氮比 C:N 14.1 ± 1.6