Land-use conversion and changing soil carbon stocks in China's 'Grain-for-Green' Program: a synthesis

Global Change Biology
Lei DengZhou-Ping Shangguan

Abstract

The establishment of either forest or grassland on degraded cropland has been proposed as an effective method for climate change mitigation because these land use types can increase soil carbon (C) stocks. This paper synthesized 135 recent publications (844 observations at 181 sites) focused on the conversion from cropland to grassland, shrubland or forest in China, better known as the 'Grain-for-Green' Program to determine which factors were driving changes to soil organic carbon (SOC). The results strongly indicate a positive impact of cropland conversion on soil C stocks. The temporal pattern for soil C stock changes in the 0-100 cm soil layer showed an initial decrease in soil C during the early stage (<5 years), and then an increase to net C gains (>5 years) coincident with vegetation restoration. The rates of soil C change were higher in the surface profile (0-20 cm) than in deeper soil (20-100 cm). Cropland converted to forest (arbor) had the additional benefit of a slower but more persistent C sequestration capacity than shrubland or grassland. Tree species played a significant role in determining the rate of change in soil C stocks (conifer < broadleaf, evergreen < deciduous forests). Restoration age was the main facto...Continue Reading

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Citations

Apr 20, 2016·Ecology and Evolution·Shunlei PengQiufeng Wang
Aug 17, 2016·International Journal of Environmental Research and Public Health·Caili SunSha Xue
Nov 23, 2017·Frontiers in Microbiology·Yang YangShaoshan An
Aug 31, 2018·Environmental Science and Pollution Research International·Li ZhangWenfeng Tan
Apr 19, 2018·Proceedings of the National Academy of Sciences of the United States of America·Fei LuGuirui Yu
Nov 22, 2018·Environmental Science and Pollution Research International·Renhuan ZhuTao Liu
Sep 13, 2019·Population and Environment·Qi ZhangQingfeng Huang
Apr 5, 2020·Environmental Science and Pollution Research International·Zhifeng JinXuesong Kong
Oct 30, 2019·International Journal of Environmental Research and Public Health·Man LiuQian Zhang
Mar 19, 2019·Global Change Biology·Derong XiaoKun Tian
Jul 3, 2019·International Journal of Environmental Research and Public Health·Qianru YuDan Wang
Nov 17, 2020·The Science of the Total Environment·Stephen M BellAntoni Rosell-Melé
Dec 29, 2020·The Science of the Total Environment·Zhiming GuoTimothy A Quine
Sep 6, 2018·The Science of the Total Environment·Yin ZhouYanli Lu
Mar 20, 2021·The Science of the Total Environment·Wenjie HuangJunsheng Li

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