降水量变化与氮添加下荒漠草原土壤酶活性及其影响因素

朱湾湾, 王攀, 许艺馨, 李春环, 余海龙, 黄菊莹

Soil enzyme activities and their influencing factors in a desert steppe of northwestern China under changing precipitation regimes and nitrogen addition

ZHU Wan-Wan, WANG Pan, XU Yi-Xin, LI Chun-Huan, YU Hai-Long, HUANG Ju-Ying

表1 降水和氮(N)添加处理前试验样地0-20 cm土壤理化性质(平均值±标准误)

Table 1 Soil physical and chemical properties in 0-20 cm layer of experimental field before precipitation and nitrogen (N) addition treatments (mean ± SE)

pH 有机碳含量 Organic carbon content (g·kg-1) 全氮含量 Total nitrogen (N) content (g·kg-1) 全磷含量 Total phosphorus (P) content (g·kg-1) NH4+-N含量 Ammonium N content (mg·kg-1) NO3--N含量 Nitrate N content (mg·kg-1) 速效磷含量 Available P content (mg·kg-1) 8.85 ± 0.01 3.70 ± 0.11 0.48 ± 0.00 0.34 ± 0.01 1.83 ± 0.07 9.96 ± 0.59 2.55 ± 0.29