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2 降雨变化和氮添加影响下沙质草地植物群落特征的方差分析
Table 2 Analysis of variance of plant community characteristics in sandy grassland under the effects of rainfall variation and nitrogen addition
处理盖度物种丰富度密度AGBBGB凋落物量HDJ
降雨13.28**2.142.353.67*3.61*7.29**0.841.291.91
加氮25.46**10.20**1.9821.98**10.63**2.0223.29**29.26**18.70**
27.67**19.18**18.61**16.01**18.15**3.1517.39**12.85**2.02
降雨×加氮1.901.441.722.221.871.021.031.462.82
降雨×年1.520.663.74*0.410.911.191.391.442.40
加氮×年0.130.300.533.050.700.180.852.371.61
降雨×加氮×年0.330.391.060.240.390.190.200.440.56