Phosphorus sorption capacity in soils from freshwater restored coastal wetlands increased with restoration age

doi:10.1016/j.geoderma.2022.115926

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Phosphorus sorption capacity in soils from freshwater restored coastal wetlands increased with restoration age
	Xu, Gang 1,4; Ren, Yuxuan 4; Yue, Mengyu 4; Lv, Yingchun 4; Chen, Xiaobing 3; Hui, Haibin 2
刊名	GEODERMA
	2022-09-15
卷号	422 页码:8
关键词	Phosphorus Freshwater restored wetland Phosphorus sorption capacity Eutrophication risk index Degree of P saturation
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2022.115926
通讯作者	Xu, Gang(gxu126@foxmail.com)
英文摘要	Coastal wetlands, located at the intersection of land and sea, are considered to be a phosphorus (P) sink, source, and reactor in the global P cycle. However, the variation in P sorption capacity with wetland age and the related sorption mechanisms are not well understood. In this study, we collected the surface soil samples (0-20 cm) from 10 coastal freshwater wetlands that had been restored for 0-44 years surrounding China's Bohai Rim. Through a series of batch experiments, we studied the factors controlling P sorption and release in these soils. The results showed that the maximum P sorption capacity (Qmax) in these wetlands was 294-2447 mg kg(-1), with an average of 1472 mg kg(-1). The Qmax generally increased with increasing wetland restoration age. The degree of P saturation (DPS) and the P eutrophication risk index (ERI) for coastal wetlands were 0.5-9.5% and 0.9-21.1%, respectively. The DPS and ERI values did not vary significantly with wetland age. These data suggest that freshwater restoration significantly increases P sorption capacity, while not greatly affecting the P release potential in the coastal wetlands surrounding Bohai Rim. These observations may be related to the soil desalination and organic matter and amorphous Fe and/or Al accumulation that occur during the freshwater restoration of degraded wetlands. Coastal wetlands (especially restored wetlands) were suggested as P storage hotspots among upland, wetland, and offshore along the coastal watersheds of Bohai. These findings indicate that the freshwater restoration significantly improved the soil properties in the degraded coastal wetlands, and therefore increased P sorption capacity in the restored wetlands.
WOS关键词	RIVER DELTA ; SEDIMENTS ; PHOSPHATE ; SALINITY ; EUTROPHICATION ; RECLAMATION ; REMOVAL ; RELEASE ; CARBON ; PH
WOS研究方向	Agriculture
语种	英语
WOS记录号	WOS:000802548500002
资助机构	National Natural Science Foundation of China ; Key Deployment Project of the Chinese Academy of Sciences ; Science and Technology Service Network Initiative
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/31159]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者	Xu, Gang
作者单位	1.80 Yantai Rd, Rizhao, Peoples R China 2.Agrotech Serv Ctr Rizhao city, Rizhao 276826, Peoples R China 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China 4.Qufu Normal Univ, Sch Geog & Tourism, Rizhao 276826, Peoples R China
推荐引用方式 GB/T 7714	Xu, Gang,Ren, Yuxuan,Yue, Mengyu,et al. Phosphorus sorption capacity in soils from freshwater restored coastal wetlands increased with restoration age[J]. GEODERMA,2022,422:8.
APA	Xu, Gang,Ren, Yuxuan,Yue, Mengyu,Lv, Yingchun,Chen, Xiaobing,&Hui, Haibin.(2022).Phosphorus sorption capacity in soils from freshwater restored coastal wetlands increased with restoration age.GEODERMA,422,8.
MLA	Xu, Gang,et al."Phosphorus sorption capacity in soils from freshwater restored coastal wetlands increased with restoration age".GEODERMA 422(2022):8.