Responses of ecosystem respiration to nitrogen enrichment and clipping mediated by soil acidification in an alpine meadow

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• 作者：Ning Zong^a ; Pei-li Shi^a ; ^d ; ^{shipl@igsnrr.ac.cn} ; ^{shipl.cas@gmail.com} ; Xi Chai^a ; ^b ; Jing Jiang^c ; Xian-zhou Zhang^a ; Ming-hua Song^a
• 关键词：Alpine meadow ; Ecosystem CO2 efflux ; Clipping ; Nitrogen enrichment ; Soil acidification
• 刊名：Pedobiologia
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：60
• 期：Complete
• 页码：1-10
• 全文大小：1509 K
• 卷排序：60

文摘

N enrichment enhanced ecosystem CO2 efflux initially, but the extent decreased over years. Clipping stimulated compensatory growth and didn’t affect ecosystem CO2 efflux and plant production. Soil pH decreased with the year of N addition and decelerated the positive responses of plant growth to N addition. Soil acidification induced by N addition mediated the effects of N addition and clipping on ecosystem carbon cycling.