高寒草原土壤交换性盐基离子对氮添加的响应: 以紫花针茅草原为例
秦书琪1,2,房凯1,2,王冠钦1,2,彭云峰1,张典业1,2,李飞1,2,周国英3,杨元合1,2,*(
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Responses of exchangeable base cations to continuously increasing nitrogen addition in alpine steppe: A case study of Stipa purpurea steppe
QIN Shu-Qi1,2,FANG Kai1,2,WANG Guan-Qin1,2,PENG Yun-Feng1,ZHANG Dian-Ye1,2,LI Fei1,2,ZHOU Guo-Ying3,YANG Yuan-He1,2,*()
)
图3. 2015年交换性盐基离子与地上生物量和土壤总无机氮含量的关系。A, 地上生物量(AGB)。B, 土壤总无机氮(TIN)。直线与阴影部分分别表示拟合曲线与95%置信区间。
Fig. 3. Relationships of soil exchangeable base cations with above-ground biomass and soil total inorganic nitrogen in 2015. A, above-ground biomass (AGB). B, soil total inorganic nitrogen (TIN). The black lines represent the fitted curves and shades for 95% confidence intervals.
