洪湖沉积柱中磷形态的垂直分布及指示意义

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Abstract

A sediment core was collected from central Honghu Lake at the end of 2014 and the P forms, total nitrogen, organic mater in sediment samples were analyzed. The results indicated that the average concentrations of TP, TN and OM were higher than the corresponding threshold value of sediment quality in Ontario, which presented a different pollution levels. Correlation analysis indicated that Fe/Al-P and OP were the main contributors to TP in sediment core. The vertical distribution of P forms could be divided into 3periods according to ¹³⁷Cs and ²¹⁰Pb dating results. The concentration of Ca-P was the highest than other forms reveled that the source of P in sediment was controlled by natural processes before 1952. During 1950s~1980s, the increasing of Fe/Al-P and OP concentrations were related to industrial and agricultural activities, while the decreasing of Ca-P might result from the hydrological change of Honghu Lake. After 1980s, the concentrations of P forms presented an increasing trend except Ca-P. The positive Person correlation between P forms and socioeconomic index (population, grain production, fertilizer usage and purse seine fishing area) of Honghu Lake indicated that anthropogenic activities were the main sources of P input into the lake.

Key words： P forms sediment core anthropogenic activities Honghu Lake

Received: 01 July 2016

PACS:

X524

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	Articles by authors
	ZHENG Huang
	YANG Dan
	JIN Meng-yun
	HU Tian-peng
	XING Xin-li

Cite this article:

ZHENG Huang,YANG Dan,JIN Meng-yun等. The vertical distribution of P forms and significance in a sediment core from Honghu Lake, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1540-1547.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I4/1540

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