中亚热带3种典型森林土壤碳氮含量和酶活性的关系

鲍勇,高颖,曾晓敏,袁萍,司友涛,陈岳民,陈滢伊

Relationships between carbon and nitrogen contents and enzyme activities in soil of three typical subtropical forests in China

Yong BAO,Ying GAO,Xiao-Min ZENG,Ping YUAN,You-Tao SI,Yue-Min CHEN,Ying-Yi CHEN

表2 不同林分类型的主要土壤理化性质和有效养分(平均值±标准偏差, n = 3)

Table 2 Main soil physical and chemical properties and soil available nutrients in different forest types (mean ± SD, n = 3)

林分类型 Forest type	pH	含水率 Moisture (%)	土壤总有机碳 Total soil organic carbon (g·kg^-1)	全氮 Total nitrogen (g·kg^-1)	C:N	NH₄⁺-N (mg·kg^-1)	NO₃^--N (mg·kg^-1)	可溶性有机碳 Dissolved organic carbon (mg·kg^-1)	可溶性有机氮 Dissolved organic nitrogen (mg·kg^-1)
SF	4.72 ± 0.18^a	27.24 ± 1.42^b	41.69 ± 1.46^a	2.43 ± 0.11^b	17.20 ± 0.50^a	80.17 ± 5.10^a	7.67 ± 1.93^a	87.47 ± 29.59^a	8.80 ± 2.28^a
AR	4.79 ± 0.10^a	35.02 ± 0.56^a	45.82 ± 5.64^a	2.89 ± 0.16^a	15.80 ± 1.03^a	92.40 ± 3.76^a	4.83 ± 2.80^a	76.98 ± 12.55^a	6.68 ± 2.28^a
PM	4.63 ± 0.06^a	28.79 ± 2.49^b	25.16 ± 0.52^b	1.83 ± 0.04^c	13.73 ± 0.59^b	54.47 ± 11.28^b	6.50 ± 0.24^a	26.55 ± 6.44^b	5.84 ± 1.46^a