凋落物输入变化和氮添加对半干旱草原群落生产力及功能群组成的影响

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嘎玛达尔基¹^,², 杨泽¹^,², 谭星儒¹^,², 王珊珊¹^,², 李伟晶¹^,², 游翠海¹^,², 王彦兵¹^,², 张兵伟¹^,³, 任婷婷¹^,², 陈世苹¹^,²^,^*(

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Effect of altered litter input and nitrogen addition on ecosystem aboveground primary productivity and plant functional group composition in a semiarid grassland

GAMADAERJI ¹^,², YANG Ze¹^,², TAN Xing-Ru¹^,², WANG Shan-Shan¹^,², LI Wei-Jing¹^,², YOU Cui-Hai¹^,², WANG Yan-Bing¹^,², ZHANG Bing-Wei¹^,³, REN Ting-Ting¹^,², CHEN Shi-Ping¹^,²^,^*(

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图7. 群落地上净初级生产力与生长季降水量(A)、土壤温度(B)、土壤含水量(C)和土壤含水量季节变异(D)之间的关系。图中标出相关系数(R²)和差异显著性分析结果(ns, p > 0.05; *, p < 0.05; **, p < 0.01; ***, p < 0.001)。C0, 凋落物去除; C1, 凋落物对照; C2, 凋落物添加; N0, 无氮添加; N1, 氮添加。

Fig. 7. Correlation analysis between aboveground net primary productivity (ANPP) and precipitation (A), soil temperature (Ts)(B), soil water content (SWC)(C), and seasonal variation of soil water content (CV_SWC)(D) during the growing season. The correlation coefficient (R²) and the significance levels are presented in the figure (ns, p > 0.05; *, p < 0.05; **, p < 0.01; ***, p < 0.001). C0, litter removal; C1, control; C2, litter addition; N0, without nitrogen addition; N1, nitrogen addition.