文献类型：期刊文献

英文题名：Increasing soil carbon stocks in eight permanent forest plots in China

作者：Zhu, Jianxiao[1,2,3] Wang, Chuankuan[4] Zhou, Zhang[2,3,5] Zhou, Guoyi[6] Hu, Xueyang[2,3] Jiang, Lai[2,3] Li, Yide[5] Liu, Guohua[7] Ji, Chengjun[2,3] Zhao, Shuqing[2,3] Li, Peng[2,3] Zhu, Jiangling[2,3] Tang, Zhiyao[2,3] Zheng, Chengyang[2,3] Birdsey, Richard A.[8] Pan, Yude[9] Fang, Jingyun[2,3]

第一作者：Zhu, Jianxiao

通信作者：Fang, JY[1];Fang, JY[2]

机构：[1]Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China;[2]Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China;[3]Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China;[4]Northeast Forestry Univ, Ctr Ecol Res, 26 Hexing Rd, Harbin 150040, Peoples R China;[5]Chinese Acad Forestry, Res Inst Trop Forestry, 682 Guangshanyi Rd, Guangzhou 510520, Peoples R China;[6]Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China;[7]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China;[8]Woods Hole Res Ctr, Falmouth, MA 02540 USA;[9]US Forest Serv, USDA, Durham, NH 03824 USA

年份：2020

卷号：17

期号：3

起止页码：715-726

外文期刊名：BIOGEOSCIENCES

收录：;Scopus(收录号：2-s2.0-85079770955);WOS:【SCI-EXPANDED(收录号:WOS:000514114600002)】；

基金：This research has been supported by the National Key Research and Development Program of China (grant no. 2017YFC0503906), the National Natural Science Foundation of China (grant nos. 31700374 and 31621091), and the International Programs, US Forest Service (grant no. 07-JV-11242300-117).

语种：英文

摘要：Forest soils represent a major stock of organic carbon (C) in the terrestrial biosphere, but the dynamics of soil organic C (SOC) stock are poorly quantified, largely due to lack of direct field measurements. In this study, we investigated the 20-year changes in SOC stocks in eight permanent forest plots, which represent boreal (1998-2014), temperate (1992-2012), subtropical (1987-2008), and tropical forest biomes (1992-2012) across China. SOC contents increased significantly from the 1990s to the 2010s, mostly in the upper 0-20 cm soil depth, and soil bulk densities do not change significantly during the same period. As a result, the averaged SOC stocks increased significantly from 125.2 +/- 85.2 Mg C ha(-1) in the 1990s to 133.6 +/- 83.1 Mg C ha(-1) in the 2010s across the forest plots, with a mean increase of 127.2-907.5 kg C ha(-1) yr(-1). This SOC accumulation resulted primarily from increasing leaf litter and fallen logs, which accounts 3.6 %-16.3% of above-ground net primary production. Our findings provided direct evidence that China's forest soils have been acting as significant C sinks, although their strength varies in forests with different climates.