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
吕亚香1,2, 戚智彦1,2, 刘伟1, 孙佳美1,*(
), 潘庆民1,2
), 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
), PAN Qing-Min1,2
图4. 氮(N)在无磷(P)添加和有磷添加情况下对净生态系统碳交换(NEE, A)、生态系统呼吸(ER, B)和总生态系统生产力(GEP, C)的作用以及磷在无氮添加和有氮添加情况下对NEE (D), ER (E)和GEP (F)的作用(平均值±标准误)。**,p < 0.01; ***, p < 0.001; ns, p> 0.05。
Fig. 4. Nitrogen (N)-induced changes in net ecosystem carbon exchange (NEE, A), ecosystem respiration (ER,B) and gross ecosystem productivity (GEP, C) with and without phosphorus (P) fertilization, and P-induced changes in NEE (D), ER(E) and GEP (F) with and without N fertilization (mean ± SE). **, p < 0.01; ***, p < 0.001; ns, p> 0.05.
