藏北高寒草地土壤有机质化学组成对土壤蛋白酶和脲酶活性的影响

马书琴, 汪子微, 陈有超, 鲁旭阳

Effect of soil organic matter chemical compositions on soil protease and urease activity in alpine grassland soils in Northern Xizang, China

MA Shu-Qin, WANG Zi-Wei, CHEN You-Chao, LU Xu-Yang

表3 藏北不同高寒草地类型土壤净氮矿化速率、净氨化速率和净硝化速率(平均值±标准误)

Table 3 Net nitrogen (N) mineralization rate, net ammonification rate and net nitrification rate in different alpine grassland soils in Northern Xizang, China (mean ± SE)

高寒草地类型 Alpine grassland type	净氮矿化速率 Net N mineralization rate (mg·g^-1·d^-1)	净氨化速率 Net ammonification rate (mg·g^-1·d^-1)	净硝化速率 Net nitrification rate (mg·g^-1·d^-1)
高寒草甸 Alpine meadow	0.33 ± 0.17^a	0.010 ± 0.004^a	0.32 ± 0.16^a
高寒草原 Alpine steppe	0.15 ± 0.06^b	0.008 ± 0.002^b	0.14 ± 0.06^b
高寒荒漠 Alpine desert	0.05 ± 0.02^b	0.003 ± 0.002^c	0.05 ± 0.01^b
高寒草甸草原 Alpine meadow steppe	0.12 ± 0.05^b	0.004 ± 0.001^c	0.12 ± 0.05^b
高寒荒漠草原 Alpine desert steppe	0.05 ± 0.02^b	0.004 ± 0.002^c	0.04 ± 0.02^b