Phosphorus Sorption and Sedimentation in a Multipond System within a Headstream Agricultural Watershed

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	Phosphorus Sorption and Sedimentation in a Multipond System within a Headstream Agricultural Watershed
	Liu, Yang ; Fu, Qiang ; Yin, Chengqing
刊名	WATER QUALITY RESEARCH JOURNAL OF CANADA
	2009
卷号	44 期号:3 页码:243-252
关键词	phosphorus sorption sediment pond watershed
中文摘要	The movement, transformation, and assimilation of phosphorus (P) in a watershed are often related to the physicochemical characteristics of the sediments of the water storage structures in the watershed. Field and laboratory experiments were conducted to study P sorption by pond sediments in a multipond system in a watershed of 6.9 km(2) in southeastern China. Being scattered in different ambient land uses, and receiving soil particles from various sources, the multipond system provides an excellent research example for P sorption as well as the relationship between pond properties and their location in a watershed. It was found that the pond sediments showed largely variable P sorption capacities in this watershed. The P sorption maximum (S(max)) ranged from 390.0 to 729.2 mg/kg, and equilibrium P concentration (EPC(0)) ranged from 0.007 to 0.023 mg/L. The mean degree of P saturation (DPS) of the pond sediments was only 9.5%. Due to the large annual delivery of sediments to the ponds by soil erosion, the pond sediments never reached saturation. The location of the ponds could influence the physicochemical properties of sediments and their sorption characteristics. For S(max), the Hill pond value was significantly higher than that for the Village pond. For EPC(0), the result was reverse. The oxalate-extractable Fe (Ox-Fe) and KCl-extractable P (KCl-P) were the key factors that influenced P sorption of the pond sediments. Ox-Fe could explain 84% of the variability in S(max) and KCl-P could explain 82% of the variability in EPC(0). The acidic and high Fe contents of laterite soil in southeastern China was the most important cause of the high P sorption capacity of the pond sediments.
WOS记录号	WOS:000207849700005
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21712]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Yang,Fu, Qiang,Yin, Chengqing. Phosphorus Sorption and Sedimentation in a Multipond System within a Headstream Agricultural Watershed[J]. WATER QUALITY RESEARCH JOURNAL OF CANADA,2009,44(3):243-252.
APA	Liu, Yang,Fu, Qiang,&Yin, Chengqing.(2009).Phosphorus Sorption and Sedimentation in a Multipond System within a Headstream Agricultural Watershed.WATER QUALITY RESEARCH JOURNAL OF CANADA,44(3),243-252.
MLA	Liu, Yang,et al."Phosphorus Sorption and Sedimentation in a Multipond System within a Headstream Agricultural Watershed".WATER QUALITY RESEARCH JOURNAL OF CANADA 44.3(2009):243-252.