降雨量和土壤氮含量对半干旱沙质草地生产力的影响
张晶, 左小安, 吕朋

Effects of soil nitrogen content and rainfall on vegetation productivity in semi-arid sandy grassland
Jing Zhang, Xiaoan Zuo, Peng Lv
表3 降雨变化和氮添加影响下沙质草地土壤理化性质的方差分析
Table 3 Analysis of variance of soil physicochemical properties in sandy grassland under the effects of rainfall variation and nitrogen addition
处理土壤含水量pH电导率容重黏粉粒土壤碳土壤氮
降雨2.440.210.822.360.680.570.53
加氮0.9759.35**1.750.554.96*0.133.11
20.38**45.80**9.60**0.2710.81**5.77*10.09**
降雨×加氮0.781.420.281.970.340.390.31
降雨×年0.991.200.961.722.410.550.60
加氮×年0.034.36*2.171.892.160.070.04
降雨×加氮×年1.260.800.540.580.740.220.05