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5. 不同年份土壤交换性Na+与土壤总无机氮含量的关系。A, 2014年。B, 2015年。TIN, 土壤总无机氮。直线与阴影部分分别表示拟合曲线与95%置信区间。
Fig. 5. Relationships of soil exchangeable Na+ with soil total inorganic nitrogen in different years. A, 2014. B, 2015. TIN, soil total inorganic nitrogen. The black lines represent the fitted curves and shades for 95% confidence intervals.
