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Combinations of soil properties, carbon inputs and climate control the saturation deficit dynamics of stable soil carbon over 17-year fertilizaiton

文献类型： 外文期刊

作者： Di, Jiaying 1 ; Xu, Minggang 1 ; Zhang, Wenju 1 ; Tong, Xiaogang 3 ; He, Xinhua 4 ; Gao, Hongjun 6 ; Liu, Hua 7 ; Wang, B 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Agr Informat Inst, Minist Agr, Key Lab Agroinformat Serv Technol, Beijing 100081, Peoples R China

3.Northwest Sci Tech Univ Agr & Forestry, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

4.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China

5.Univ Western Australia, Sch Biol Sci, Crawley, WA 6009, Australia

6.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Changchun 130033, Jilin, Peoples R China

7.Xinjiang Acad Agr Sci, Inst

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2018 年 8 卷

页码：

收录情况： SCI

摘要： The soil organic carbon (SOC) saturation deficit (C-sd) of silt and clay fractions represents the potential for SOC sequestration in a stable form and can influence organic C stabilization efficiency. Little is known, however, about temporal changes of stable soil C-sd and how it is affected by soil properties, climate and C inputs. We investigated the temporal changes in the C-sd of fine fractions (< 53 mu m) and examined the factors controlling these changes at three dry-land sites with 17-year fertilizer management histories in China. The rates of change in the stable soil C-sd under manure treatments varied from -0.72 to -1.24% yr(-1) after 17 years of fertilization, indicating that stable C levels under manure treatments were significantly higher than those under other treatments. Stable soil C-sd was controlled by a combination of soil properties, temperature, and C inputs at all sites, and the higher variance of C-sd of fine fractions can be explained by the soil properties (up to 50%). Furthermore, the quantity of C inputs was the most influential variable for stable soil C-sd. These results revealed key controls on stable C sequestration potential and indicated the need to develop management strategies to promote stable C sequestration under long-term intensive fertilization.

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