Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release.However,to date,few studies have addressed these processes.Here,we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon(SIC)stocks in China.We observe an overall decrease in SIC stocks in topsoil(0-30 cm)(11.33 g C m-2 yr-1)from the 1980s to the 2010s.Total SIC stocks have decreased by～8.99±2.24％(1.37±0.37 Pg C).The average SIC losses across China(0.046 Pg C yr-1)and in cropland(0.016 PgCyr-1)account for～17.6％-24.0％of the terrestrial C sink and 57.1％of the soil organic carbon sink in cropland,respectively.Nitrogen deposition and climate change have profound influences on SIC cycling.We estimate that～19.12％-19.47％of SIC stocks will be further lost by 2100.The consumption of SIC may offset a large portion of global efforts aimed at ecosystem carbon sequestration,which emphasizes the importance of achieving a better understanding of the indirect coupling mechanisms of nitrogen and carbon cycling and of effective countermeasures to minimize SIC loss.

Xiao-Dong Song;Fei Yang;Hua-Yong Wu;Jing Zhang;De-Cheng Li;Feng Liu;Yu-Guo Zhao;Jin-Ling Yang;Bing Ju;Chong-Fa Cai;Biao Huang;Huai-Yu Long;Ying Lu;Yue-Yu Sui;Qiu-Bing Wang;Ke-Ning Wu;Feng-Rong Zhang;Ming-Kui Zhang;Zhou Shi;Wan-Zhu Ma;Gang Xin;Zhi-Ping Qi;Qing-Rui Chang;En Ci;Da-Gang Yuan;Yang-Zhu Zhang;Jun-Ping Bai;Jia-Ying Chen;Jie Chen;Yin-Jun Chen;Yun-Zhong Dong;Chun-Lan Han;Ling Li;Li-Ming Liu;Jian-Jun Pan;Fu-Peng Song;Fu-Jun Sun;Deng-Feng Wang;Tian-Wei Wang;Xiang-Hua Wei;Hong-Qi Wu;Xia Zhao;Qing Zhou;Gan-Lin Zhang

State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;College of Advanced Agricultural Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China;Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,China;Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Harbin 150081,China;College of Land and Environment,Shenyang Agricultural University,Shenyang 110161,China;School of Land Science and Technology,China University of Geosciences,Beijing 100083,China;College of Land Science and Technology,China Agricultural University,Beijing 100193,China;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China;Institute of Digital Agriculture,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;College of Agriculture,Heilongjiang Bayi Agricultural University,Daqing 163319,China;Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China;College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China;College of Resources and Environment,Southwest University,Chongqing 400715,China;College of Resources,Sichuan Agricultural University,Chengdu 611130,China;College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China;Institute of Agricultural Product Quality Standard and Testing Research,Tibet Academy of Agricultural and Animal Husbandry Sciences,Lhasa 850032,China;School of Agricultural Sciences,Zhengzhou University,Zhengzhou 450001,China;Institute of Agriculture Environment and Resources Research,Shanxi Academy of Agricultural Sciences,Taiyuan 030006,China;College of Resources and Environment,Henan Agricultural University,Zhengzhou 450002,China;College of Resources and Environment,China Agricultural University,Beijing 100193,China;College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;College of Resources and Environment,Shandong Agricultural University,Taian 271018,China;Agricultural College,Guangxi University,Nanning 530005,China;College of Grassland and Environment Science,Xinjiang Agricultural University,Urumqi 830052,China;College of Geographical Science,Qinghai Normal University,Xining 810008,China;Key Laboratory of Watershed Geographic Sciences,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China

国家科学评论（英文版）

[1]Xiao-Dong Song;Fei Yang;Hua-Yong Wu;Jing Zhang;De-Cheng Li;Feng Liu;Yu-Guo Zhao;Jin-Ling Yang;Bing Ju;Chong-Fa Cai;Biao Huang;Huai-Yu Long;Ying Lu;Yue-Yu Sui;Qiu-Bing Wang;Ke-Ning Wu;Feng-Rong Zhang;Ming-Kui Zhang;Zhou Shi;Wan-Zhu Ma;Gang Xin;Zhi-Ping Qi;Qing-Rui Chang;En Ci;Da-Gang Yuan;Yang-Zhu Zhang;Jun-Ping Bai;Jia-Ying Chen;Jie Chen;Yin-Jun Chen;Yun-Zhong Dong;Chun-Lan Han;Ling Li;Li-Ming Liu;Jian-Jun Pan;Fu-Peng Song;Fu-Jun Sun;Deng-Feng Wang;Tian-Wei Wang;Xiang-Hua Wei;Hong-Qi Wu;Xia Zhao;Qing Zhou;Gan-Lin Zhang-.Significant loss of soil inorganic carbon at the continental scale)[J].国家科学评论（英文版）,2022(02):8-15

PgCyr

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