中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 水土保持研究所
  3. 中国科学院水利部水土保持研究所
  4. 水保所科研产出--SCI
  5. 2018--SCI
Aggregate stability and associated organic carbon and nitrogen as affected by soil erosion and vegetation rehabilitation on the Loess Plateau

文献类型：期刊论文

作者Zhihua Shi3,5; Fang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.; Yixia Wang2,3; Lishan Ran1; Nufang Fang2,3; Shi, ZH (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China.
刊名CATENA
出版日期2018
卷号167页码:257-265
ISSN号0341-8162
关键词Soil Erosion Land Use Aggregate Check Dam Soil Organic Carbon
DOI10.1016/j.catena.2018.05.005
文献子类Article
英文摘要Although soil erosion and land use change have long been focuses in carbon research, the combined influence of soil erosion and vegetation rehabilitation on aggregate stability and the associated soil organic carbon (SOC) and total nitrogen (TN) remains unclear. The current study evaluated the effects of soil erosion on aggregate stability and the associated SOC and TN dynamics in relation to vegetation rehabilitation after the implementation of the "Grain-for-Green" project in the hilly Loess region. A check dam sediment sequence was dated using Cs-137 activity and erosive rainfall events. The SOC and TN in the bulk soil and aggregate fractions were measured in soils from rehabilitated grasslands and sloping croplands and in sediments retained by the check dam. The results showed that vegetation rehabilitation led to 78%, 27% and 9% average increases in the macroaggregate amount, mean weight diameter (MWD) and mean geometric diameter (MGD), respectively. In addition, rehabilitation resulted in the highest SOC and TN concentrations and contents in macroaggregates among all the aggregate size fractions. Soil erosion facilitated the modification of the aggregate size distributions along with soil mineralization and induced the incorporation of deeper SOC-poor soils during transport. These processes resulted in the aggregate-associated SOC and TN concentrations and contents in the sediments being significantly lower than those in the eroding sloping cropland soils. The highest reductions were found in micro aggregates, which exhibited decreases of 48% and 44% for SOC and TN, respectively. Moreover, reaggregation and gully soils incorporated during soil erosion led to higher values of macroaggregate amount and aggregate stability at depositional sites than those at eroding sloping cropland sites in this study. Our study contributes to the understanding of the effects of soil erosion and vegetation rehabilitation on SOC and TN dynamics, which is crucial for understanding the restoration efficiency in soil erosion control and ecosystem security evaluation.
学科主题Geology ; Agriculture ; Water Resources
出版地PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000436382700024
资助机构National Key Research and Development Program of China [2016YFC0402401] ; National Key Research and Development Program of China [2016YFC0402401] ; National Natural Science Foundation of China [41671282, 41525003] ; National Natural Science Foundation of China [41671282, 41525003] ; National Key Research and Development Program of China [2016YFC0402401] ; National Key Research and Development Program of China [2016YFC0402401] ; National Natural Science Foundation of China [41671282, 41525003] ; National Natural Science Foundation of China [41671282, 41525003]
源URL[http://ir.iswc.ac.cn/handle/361005/8202]  
专题水保所科研产出--SCI_2018--SCI
通讯作者Fang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.; Shi, ZH (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China.
作者单位1.Univ Hong Kong, Dept Geog, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Zhihua Shi,Fang, NF ,Yixia Wang,et al. Aggregate stability and associated organic carbon and nitrogen as affected by soil erosion and vegetation rehabilitation on the Loess Plateau[J]. CATENA,2018,167:257-265.
APA Zhihua Shi,Fang, NF ,Yixia Wang,Lishan Ran,Nufang Fang,&Shi, ZH .(2018).Aggregate stability and associated organic carbon and nitrogen as affected by soil erosion and vegetation rehabilitation on the Loess Plateau.CATENA,167,257-265.
MLA Zhihua Shi,et al."Aggregate stability and associated organic carbon and nitrogen as affected by soil erosion and vegetation rehabilitation on the Loess Plateau".CATENA 167(2018):257-265.

入库方式： OAI收割

来源：水土保持研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。