Warming increases soil carbon input in a Sibiraea angustata-dominated alpine shrub ecosystem

作     者：Mei Liu Jia-Hao Wen Ya-Mei Chen Wen-Juan Xu Qiong Wang Zhi-Liang Ma 

作者机构：Ecological Security and Protection Key Laboratory of Sichuan ProvinceMianyang Normal UniversityMianyang 621000China Department of Watershed Sciences and the Ecology CenterUtah State UniversityLoganUT 84321USA College of Life SciencesChina West Normal UniversityNanchong 637009China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2022年第15卷第2期

页      面：335-346页

核心收录：

学科分类：0710[理学-生物学] 0907[农学-林学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 090301[农学-土壤学] 

基　　金：supported by the Open Project from the Ecological Security and Protection Key Laboratory of Sichuan Province(ESP1904,ESP2102) the Doctoral Scientific Research Foundation of China West Normal University(18Q047) the Scientific Research Innovation Team Project of China West Normal University(CXTD2020-4) 

主　　题：soil organic carbon foliar litter root litter root exudates climate warming alpine shrub Qinghai-Tibetan Plateau 

摘      要：Plant-derived carbon(C)inputs via foliar litter,root litter and root exudates are key drivers of soil organic C ***,the responses of these three input pathways to climate warming have rarely been studied in alpine *** employing a 3-year warming experiment(increased by 1.3℃),we investigated the effects of warming on the relative C contributions from foliar litter,root litter and root exudates from Sibiraea angustata,a dominant shrub species in an alpine shrubland on the eastern Qinghai-Tibetan *** soil organic C inputs from foliar litter,root litter and root exudates were 77.45,90.58 and 26.94 g C m^(-2),*** only slightly increased the soil organic C inputs from foliar litter and root litter by 8.04 and 11.13 g C m^(-2),but significantly increased the root exudate C input by 15.40 g C m^(-2).Warming significantly increased the relative C contributions of root exudates to total C inputs by 4.6%but slightly decreased those of foliar litter and root litter by 2.5%and 2.1%,*** results highlight that climate warming may stimulate plant-derived C inputs into soils mainly through root exudates rather than litter in alpine shrublands on the Qinghai-Tibetan Plateau.