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3 年份(α)、降水量(β)、氮添加(γ)及其交互作用对土壤酶活性的影响

Table 3 Effects of sampling year (α), precipitation (β), nitrogen addition (γ), and their interactions on soil enzyme activities

差异来源 Difference source α β γ α × β α × γ β × γ α × β × γ SA 25.571** 4.421** 24.767** 5.802** 0.179 0.433 0.472 UA 385.536** 5.662** 8.980** 4.755** 0.563 3.530* 2.959* PA 186.338** 7.070** 3.716 16.133 1.207 1.143 3.945**