早春和夏季氮磷添加对内蒙古典型草原退化群落碳交换的影响

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吕亚香¹^,², 戚智彦¹^,², 刘伟¹, 孙佳美¹^,^*(

), 潘庆民¹^,²

Effects of nitrogen and phosphorus addition at early-spring and middle-summer on ecosystem carbon exchanges of a degraded community in Nei Mongol typical steppe

LÜ Ya-Xiang¹^,², QI Zhi-Yan¹^,², LIU Wei¹, SUN Jia-Mei¹^,^*(

), PAN Qing-Min¹^,²

图1. 氮、磷对碳交换参数互作效应示意图。N, 氮单独添加下氮对生态系统碳交换指标的效应; P, 磷单独添加下磷对生态系统碳交换指标的效应。N_NP, 氮磷共同添加下氮对生态系统碳交换指标的效应; NP, 氮磷共同添加下氮和磷对生态系统碳交换指标的效应; P_NP, 氮磷共同添加下磷对生态系统碳交换指标的效应。

Fig. 1. A conceptual framework illustrating interactive effects between nitrogen and phosphorus on parameters of carbon exchanges. N, effect of nitrogen on parameters of carbon exchanges under the scenario of only nitrogen addition; P, effect of phosphorus on parameters of carbon exchanges under the scenario of only phosphorus addition. N_NP, effect of nitrogen on parameters of carbon exchanges under the scenario of nitrogen and phosphorus co-addition;NP, co-effect of nitrogen and phosphorus on parameters of carbon exchanges under the scenario of nitrogen and phosphorus co-addition; P_NP, effect of phosphorus on parameters of carbon exchanges under the scenario of nitrogen and phosphorus co-addition.