数字农科院2.0

Effects of nitrogen and water addition on ecosystem carbon fluxes in a heavily degraded desert steppe

文献类型： 外文期刊

作者： Chao Wen;Yumei Shan;Tingting Xing;Li Liu;Guomei Yin;Ruhan Ye;Xinchao Liu;Hong Chang;Fengyan Yi;Sibo Liu;Pujin Zhang;Jianhui Huang;Taogetao Baoyin

作者机构：

关键词： Desert steppe;Ecosystem CO2 fluxes;Nitrogen addition;Precipitation increase

期刊名称： Global Ecology and Conservation

ISSN： 2351-9894

年卷期： 2024 年 52 卷

页码：

收录情况： SCIE（2024版）

摘要： Changes in global precipitation patterns and increased nitrogen (N) deposition have important effects on the dynamics of the carbon (C) cycle in grassland ecosystems. Long-term overgrazing caused heavy degradation of grasslands and more than 60 % of China's natural grasslands experienced moderate to severe degradation. To elucidate the effects of increasing precipitation and N deposition on C fluxes in a desert steppe ecosystem, experiments with nitrogen and water addition were conducted with four treatments, i.e., control (CK), N addition (N), water addition (W), combined addition of N and water (NW), in a Stipa breviflora desert steppe that had been heavily degraded. The ecosystem CO2 fluxes, including gross ecosystem productivity (GEP), net ecosystem CO2 exchange (NEE), and ecosystem respiration (ER), were determined using the closed chamber method during the growing seasons (May–October) of 2019 and 2020. Our results showed that water and nitrogen addition did not change the patterns of the seasonal dynamics of the ecosystem CO2 fluxes, indicating that water is the main limiting factor of CO2 fluxes in the studied desert steppe ecosystem. Precipitation increase (both W and NW treatments) stimulated all three components of the ecosystem CO2 fluxes, but N addition alone enhanced NEE and GEP while had no significant effects on ER, indicating water-induced increase of GEP was caused by both NEE and ER while N-induced increase of GEP was mainly caused by increases of NEE. Water addition can increase the effectiveness of N addition, but there was little interaction between the two factors. Soil moisture was more significantly correlated than soil temperature with ecosystem CO2 fluxes, and water addition could further enhance the correlation of ecosystem CO2 fluxes with soil temperature and moisture. Overall, ecosystem CO2 fluxes are more sensitive to the precipitation increase than to the N addition. These findings indicate that water supply will play more important role in ecosystem productivity of the desert steppe under the predicted scenarios of precipitation increase and increasing N deposition, which also provides scientific evidence for the restoration of those degraded desert steppe induced by overgrazing can not be achieved simply by increasing soil N availability.

分类号：

  • 相关文献

[1]Changes of soil CO2 flux under different stocking rates during spring-thaw period in a northern desert steppe, China. Tang, Shiming,Zhai, Xiajie,Liu, Kesi,Wang, Kun,Tang, Shiming,Han, Guodong,Jiang, Yuanyuan,Zhou, Pei,Wang, Chengjie,Zhang, Yujuan,Guo, Yupin,Wilkes, Andreas. 2015

[2]Microbial dynamic changes under different grazing intensities in growing seasons of Desert steppe. He, Jing,Yang, Tingting,Shi, Tao. 2014

[3]Can Litter (Dead Herbage) Management Affect the Production and Composition of a Desert Steppe Community?. Wang, Jing,Wang, Zhen,Yang, Jianqing,Wang, Zhongwu,Li, Zhiguo,Zhao, Mengli. 2023

[4]Spatial-Temporal Characteristics and Driving Forces of Aboveground Biomass in Desert Steppes of Inner Mongolia, China in the Past 20 Years. Wu, Nitu,Liu, Guixiang,Wuyun, Deji,Yi, Bole,Du, Wala,Han, Guodong. 2023

[5]Grazing exclusion is more effective for vegetation restoration and nutrient transfer in the heavily degraded desert steppe. Dongjie Hou,Jiayue Liu,Nan Li,Beilei Han,Changcheng Liu,Zhongwu Wang. 2024

[6]Greenhouse gas emissions from livestock production tripled those from household consumption in the Eurasian desert steppe. Wang, Lulu,Liu, Xinchao,Wu, Susie,Legesse, Tsegaye Gemechu,Xu, Zhuwen,Chen, Jiquan,Zhang, Yaoqi,Xin, Xiaoping,Dong, Xiaobing,Liu, Yun,Cao, Kexin,Shao, Changliang. 2025

[7]Moderate grazing drives contrasting microbial network reorganization and functional shifts in desert and meadow steppes of Inner Mongolia. Gai Hang,Chengyang Zhou,Shining Zuo,Li Liu,Ding Huang. 2025

[8]N-Fertilizer-Driven Association Between The Arbuscular M.ycorrhizal Fungal Community And D iazotrophic Community Impacts Wheat Yield. Tian, Guangli,Luo, Gongwen,Wang, Min,Tian, Guangli,Shen, Qirong,Kong, Yali,Zhu, Chen,Ling, Ning,Guo, Shiwei,Guo, Junjie. 2018

[9]Interactions of water and nitrogen addition on soil microbial community composition and functional diversity depending on the inter-annual precipitation in a Chinese steppe. Sun Liang-jie,Qi Yu-chun,Dong Yun-she,He Ya-ting,Peng Qin,Liu Xin-chao,Jia Jun-qiang,Guo Shu-fang,Cao Cong-cong,Sun Liang-jie,Liu Xin-chao,Jia Jun-qiang,Guo Shu-fang,Cao Cong-cong,He Ya-ting. 2015

[10]Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow. Dongxue Tao,Taiping Chen,Yan Luo,Honghui Wu,Xinyu Wang,Jing Wang,Yingzhi Gao. 2021

[11]Mowing increased plant diversity but not soil microbial biomass under N-enriched environment in a temperate grassland. Ning, Qiushi,Jiang, Liangchao,Niu, Guoxiang,Yu, Qiang,Liu, Jushan,Wang, Ruzhen,Liao, Sha,Huang, Jianhui,Han, Xingguo,Yang, Junjie. 2022

[12]N Addition Overwhelmed the Effects of P Addition on the Soil C, N, and P Cycling Genes in Alpine Meadow of the Qinghai-Tibetan Plateau. Jiannan Xiao,Shikui Dong,Hao Shen,Shuai Li,Kelly Wessell,Shiliang Liu,Wei Li,Yangliu Zhi,Zhiyuan Mu,Hongbo Li. 2022

[13]Contrasting effects of plant inter- and intraspecific variation on community trait responses to nitrogen addition and drought in typical and meadow steppes. Aixia Guo,Xiaoan Zuo,Senxi Zhang,Ya Hu,Ping Yue,Peng Lv,Xiangyun Li,Shenglong Zhao,Qiang Yu. 2022

[14]Effects of winter grazing and N addition on soil phosphorus fractions in an alpine grassland on the Qinghai-Tibet Plateau. Zhen Huan Guan,Zuonan Cao,Xiao Gang Li,Peter Kühn,Guozheng Hu,Thomas Scholten,Jianxiao Zhu,Jin Sheng He. 2023

[15]Temporal coupling of plant and microbial nitrogen uptake and plant nitrogen reallocation improve grassland nitrogen retention under nitrogen addition. Jirui Gong,Biao Wang,Zihe Zhang,Liangyuan Song,Siqi Zhang,Weiyuan Zhang,Jiaojiao Dong,Xuede Dong,Yingying Liu,Yuchun Yan. 2024

[16]Mechanisms underlying the negative effects of nitrogen addition on soil nematode communities in global grassland ecosystems. Wen Xing,Xiaoming Lu,Shoubao Geng,Jingyi Ding,Yongfei Bai. 2023

[17]Warming intensified the effects of nitrogen addition on N2O emissions from alpine meadow in the northern Qinghai-Tibet Plateau. Li, Ming-Jie,Ge, Yi-Qing,Ganjurjav, Hasbagan,Hu, Guo-Zheng,Wu, Hong-Bao,Yan, Jun,He, Shi-Cheng,Gao, Qing-Zhu. 2024

[18]Synergistic effects of multiple global change drivers on terrestrial ecosystem carbon sink. Tang, Shiming,Tian, Dashuan,Wang, Jinsong,Zhang, Ruiyang,Wang, Song,Song, Jian,Wan, Shiqiang,Zhang, Jinxin,Zhang, Shuang,Li, Zhaolei,Niu, Shuli. 2024

[19]Nitrogen addition-driven soil organic carbon stability depends on the fractions of particulate and mineral-associated organic carbon. Xu, Yulin,Zhao, Yuqing,Cha, Xinyu,Yang, Wanlin,Zheng, Mengtao,Liu, Shuang,Wang, Yuxiao,Cai, Andong,Han, Xinhui,Yang, Gaihe,Ren, Chengjie. 2024

[20]Global patterns of the interactive effects of N and P enrichment on terrestrial microbial biomass. Li S.,Zhang S.,Tang S.,Duan S.,Shao Q.,Zhan Q.,Jin K.. 2024

作者其他论文 更多>>