北方农牧交错带中心支轴式灌溉模式对水土资源的影响
连杰, 冯静, 苏娜, 刘尚华, 张雷, 王新源, 张蕊, 吴明润

Effects of center-pivot irrigation on soil and water resources in the agro-pastoral ecotone of Northern China
Jie Lian, Jing Feng, Na Su, Shanghua Liu, Lei Zhang, Xinyuan Wang, Rui Zhang, Mingrun Wu
图4 地上生物量和生物量碳、氮、磷密度(置信水平α= 0.05)
注:不同小写字母表示差异显著,P<0.05
Fig.4 Aboveground biomass and biomass densities of carbon, nitrogen and phosphorus