Soil organic carbon fractions and C-14 ages through 70 years of cropland cultivation
文献类型：期刊论文
| 作者 | Yu, Xia1,2,9; Zhou, Weijian1,2,3,8; Cheng, Peng1,2,4,5; Wang, Yunqiang2,3,8; Hou, Yaoyao1,2; Burr, G. S.1,7; Xiong, Xiaohu1,2; Wang, Ya1,2,9; Yang, Ling1,2,9; Dodson, John6 |
| 刊名 | SOIL & TILLAGE RESEARCH
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 195页码:10 |
| ISSN号 | 0167-1987 |
| 关键词 | C-14 age Cultivation time Soil organic carbon fractions Temperature stepped-combustion Reclaimed cropland |
| DOI | 10.1016/j.still.2019.104415 |
| 通讯作者 | Zhou, Weijian(weijian@loess.llqg.ac.cn) |
| 英文摘要 | Understanding the biogeochemistry of soil organic carbon (SOC) and SOC components is essential to assess soil quality and management practices in reclaimed croplands. Here we study the radiocarbon (C-14) ages in profiles to a depth of 500 cm for five cultivation timespans: 5, 15, 35, 60, and at least 70 years from the Gutun watershed on the Chinese Loess Plateau. We isolated an acid-extractable SOC component (F1), three temperature stepped-combustion SOC components: F2 (400 degrees C), F3 (600 degrees C), and F4 (900 degrees C), and measured their C-14 ages. Our results show that SOC stocks in reclaimed soils declined from cultivation times of 5 years (R5) to 15 years (R15), then increased with longer cultivation times, until 70 years (R70). The SOC content of the F2 and F3 fractions was higher than F1 and F4 over the past 60 years, while the F4 fraction in R70 had the highest value. Since the newly reclaimed croplands were heavily fertilized, R5 had high SOC and carbon management index (CMI) values, and C-14 ages close to the other SOC fractions in the surface soil. The C-14 ages of SOC fractions in deep soils were older than others, indicating a weak capacity to fix fresh C that infiltrated the deeper soils in R5. R70 contained the highest SOC stocks, but with a large proportion of old, non-labile SOC that contributed to relatively low SOC quality and CMI. Therefore, we predict that the R70 site would be unable to sustain optimal maize productivity. The SOC stocks under R35 were significantly lower than those from R5 and R70, but contained a high proportion of labile SOC, with relatively young C-14 ages (compared to R60), even to a depth of 500 cm. This observation suggests that planting forest nurseries can improve SOC quality and promote SOC sequestration even in relatively deep soils. This study demonstrates the efficacy of labile SOC content and C-14 ages as measures of SOC quality, and our findings offer useful guidance for the management of reclaimed croplands. |
| WOS关键词 | MANAGEMENT INDEX ; INORGANIC CARBON ; TEMPERATURE SENSITIVITY ; VEGETATION RESTORATION ; QUALITY ; MATTER ; POOLS ; TILLAGE ; SEQUESTRATION ; INDICATORS |
| 资助项目 | National Natural Science Foundation of China[41730108] ; National Natural Science Foundation of China[41773141] ; National Natural Science Foundation of China[41573136] ; National Research Program for Key Issues in Air Pollution Control[DQGG0105-02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23010302] ; International Partnership Program of Chinese Academy of Sciences[132B61KYSB20170005] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1724] ; CAS Light of West China Program[XAB2016A01] ; Youth Innovation Promotion Association CAS[2017452] ; State Key Laboratory of Loess and Quaternary Geology[LQ1301] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000494053700056 |
| 资助机构 | National Natural Science Foundation of China ; National Research Program for Key Issues in Air Pollution Control ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; CAS Light of West China Program ; Youth Innovation Promotion Association CAS ; State Key Laboratory of Loess and Quaternary Geology |
| 源URL | [http://ir.ieecas.cn/handle/361006/12917]  |
| 专题 | 地球环境研究所_加速器质谱中心 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Zhou, Weijian |
| 作者单位 | 1.Xian AMS Ctr, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266237, Shandong, Peoples R China 5.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China 6.Australian Nucl Sci & Technol Org, Inst Environm Res, Kirrawee, DC 2232, Australia 7.Natl Taiwan Univ, Dept Geosci, Taipei 10617, Taiwan 8.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China 9.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Xia,Zhou, Weijian,Cheng, Peng,et al. Soil organic carbon fractions and C-14 ages through 70 years of cropland cultivation[J]. SOIL & TILLAGE RESEARCH,2019,195:10. |
| APA | Yu, Xia.,Zhou, Weijian.,Cheng, Peng.,Wang, Yunqiang.,Hou, Yaoyao.,...&Dodson, John.(2019).Soil organic carbon fractions and C-14 ages through 70 years of cropland cultivation.SOIL & TILLAGE RESEARCH,195,10. |
| MLA | Yu, Xia,et al."Soil organic carbon fractions and C-14 ages through 70 years of cropland cultivation".SOIL & TILLAGE RESEARCH 195(2019):10. |
入库方式： OAI收割
来源：地球环境研究所
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