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Soil pH changes in a small catchment on the Chinese Loess Plateau after long-term vegetation rehabilitation

文献类型：期刊论文

作者Jin, Zhao1,6,7; Luo, Da5,7; Yu, Yunlong4,7; Yang, Siqi2,7; Zhang, Jing1,3; Cao, Guofan1,3
刊名ECOLOGICAL ENGINEERING
出版日期2022-02-01
卷号175页码:10
ISSN号0925-8574
关键词Afforestation Catchment topography Hydrogeochemical processes Paired catchments
DOI10.1016/j.ecoleng.2021.106503
通讯作者Jin, Zhao(jinzhao@ieecas.cn)
英文摘要Soil pH is a fundamental parameter of soil chemical properties, and changes in soil pH (CIPs) alter hydrogeochemical processes in the Earth's critical zone. Afforestation has long been reported to change surface soil pH at the site scale or regional scale, while few studies have discussed the effects of afforestation and microtopography on soil pH at the catchment scale. We hypothesize that both afforestation and microtopography affect surface soil pH in a catchment. To test this hypothesis, two neighboring catchments in which one catchment was restored with natural vegetation and the other was afforested in 1954 were selected and surface soils were sampled. The soil pH, soil water content (SWC), total nitrogen (TN), soil organic and inorganic carbon (SOC and SIC) were analyzed for those soil samples. Moreover, trees coverage, LAI and grass cover were investigated in the two catchments. The results showed that over 60 years of afforestation in the catchment reduced the soil pH values at the depth of 0-80 cm in only the topography of the downhill gully, and the CIPs ranged from -0.02 to -0.15. In the topography of the upper hillslope, afforestation showed no significant impacts on soil pH. The reduction in soil pH in the gullies of the forestland catchment had a significant linear and negative relationship with TN and SOC. Moreover, microtopography showed significant impacts on soil pH. In the forestland catchment, the downhill gully showed lower soil pH values than those in the upper hillslope, while the opposite difference was detected in the grassland catchment. The high coverage of vegetation in the forestland gully and frequent gravity erosion in the grassland gully could explain the contrasting trends of soil pH differences between the two landforms in the catchment. The results of this study deepen our understanding of the effects of afforestation and catchment topography on soil pH and the related critical zone processes.
WOS关键词EARTHS CRITICAL ZONE ; CARBON ; TOPOGRAPHY ; RESPONSES ; REGION
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Natural Science Foundation of China[41790444] ; National Key Research and Development Program[2018YFC1504701]
WOS研究方向Environmental Sciences & Ecology ; Engineering
语种英语
出版者ELSEVIER
WOS记录号WOS:000728757700008
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program
源URL[http://ir.ieecas.cn/handle/361006/17332]  
专题地球环境研究所_生态环境研究室
第四纪科学与全球变化卓越创新中心
通讯作者Jin, Zhao
作者单位1.Natl Observat & Res Stn Earth Crit Zone Loess Pla, Xian 710061, Peoples R China
2.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier IRCE, Beijing 100875, Peoples R China
3.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China
4.Hangzhou Dianzi Univ, Chinese Acad Sci & Educ Evaluat, Hangzhou 310018, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
7.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Jin, Zhao,Luo, Da,Yu, Yunlong,et al. Soil pH changes in a small catchment on the Chinese Loess Plateau after long-term vegetation rehabilitation[J]. ECOLOGICAL ENGINEERING,2022,175:10.
APA Jin, Zhao,Luo, Da,Yu, Yunlong,Yang, Siqi,Zhang, Jing,&Cao, Guofan.(2022).Soil pH changes in a small catchment on the Chinese Loess Plateau after long-term vegetation rehabilitation.ECOLOGICAL ENGINEERING,175,10.
MLA Jin, Zhao,et al."Soil pH changes in a small catchment on the Chinese Loess Plateau after long-term vegetation rehabilitation".ECOLOGICAL ENGINEERING 175(2022):10.

入库方式： OAI收割

来源：地球环境研究所

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