文献类型： 外文期刊
作者： Wang, Yidong 1 ; Xue, Dongmei 1 ; Hu, Ning 3 ; Lou, Yilai 4 ; Zhang, Qingzhong 4 ; Zhang, Limin 4 ; Zhu, Ping 5 ; Gao, Ho 1 ;
作者机构： 1.Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China
2.Tianjin Normal Univ, Sch Geog & Environm Sci, Tianjin 300387, Peoples R China
3.Univ Oklahoma, Inst Environm Genom, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
5.Jilin Acad Agr Sci, Inst Agr Resources & Environm, Changchun 130001, Peoples R China
6.Henan Acad Agr Sci, Inst Plant Nutr & Environm Resources Sci, Zhengzhou 450002, Peoples R China
7.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
8.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
9.Russian Acad Sci, Inst Physicochem & Biol Problems Soil Sci, Moscow 142290, Russia
10.Univ Goettingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, D-37077 Gottingen, Germany
11.RUDN Univ, Agrotechnol Inst, Moscow 117198, Russia
关键词： Natural vegetation restoration; Particulate organic matter; Physical and biochemical protection; Soil organic matter fractionation; Land use
期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）
ISSN： 0341-8162
年卷期： 2021 年 200 卷
页码：
收录情况： SCI
摘要： Post-agricultural natural restoration is a worldwide strategy for eco-environmental sustainability. However, it is unclear how it affects soil organic carbon (SOC) pools and composition among soil types across climate gradient. Here, we investigated 23-year post-agricultural restorations of SOC in three soils: Luvic Phaeozem, Calcaric Cambisol and Ferralic Cambisol typical for mid-temperate, warm-temperate and subtropical zones, respectively. Six SOC fractions with different protection mechanisms (non-protected, physically, chemically, biochemically, physico-chemically and physico-biochemically) were separated. Compared with pre-restoration in 1990, post-agricultural restoration rebuilt SOC similarly (+68-+91%) among the three soils despite of different SOC background. Compared with continuous cultivation, post-agricultural restoration increased total SOC pools in all the three soils (+33-+60%) mainly because of the increments of non-protected pool (coarse particulate organic C, cPOC). However, the pure physically, chemically, and biochemically protected SOC fractions were less sensitive to post-agricultural restoration. The physico-biochemically protected SOC was hampered by restoration in the two temperate soils but remained stable in the subtropical soil, suggesting a divergent self-restoring trend. Positive correlations of the total SOC and most fractions with wetness (precipitation/temperature ratio) demonstrated the climate dependency of SOC. In conclusion, post-agricultural natural restoration builds up SOC pool mainly due to the cPOC increment and shifts SOC composition towards more easily available C in three soils across the climatic gradient.
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