摘要
采用连续提取法和欧洲SM T法对福建省山仔水库和西湖表层沉积物的磷形态进行分级提取测定。分析结果表明,两者的总磷含量分别与国内发生富营养化的深水库、浅层湖泊表层沉积物总磷含量相当,说明沉积物可能是上覆水中溶解性磷的重要来源。2个湖泊沉积物无机磷都占大多数,无机磷中铁磷含量远远高于铝磷和钙磷的含量,山仔水库铁磷占总磷量的35%～45%,西湖铁磷占总磷量的60%以上,2个湖泊表层沉积物中低百分含量的钙磷和闭蓄态磷表明沉积物中磷主要来自人为输入。
The role of sediment in balancing nutrient of eutrophicated lake has been documented in many literatures from many parts of the world.In many cases,the physical-chemical and biological processes of uptake,sedimentation and reactivation have been found to determine phosphorus concentrations in water column,as well as primary productivity.There have been bloom algae in most lakes of Fujian Province in the past decade,especially during warmer seasons.After controlling the input phosphorus from the total catchment,there is still little improvement in these lakes.Since there is few investigation concerning sediment nutrients in terrestrial lakes in Fujian Province,this paper uses the sequential extraction and SMT methods for extraction of various phosphorus forms in surface sediments of the Shanzi Reservior and of the West Lake.The results showed that the contents of total phosphorus in these two lakes surface sediments were found to be475.97to728.85μg·g -1 for Shanzi Reservior and736.48to873.85μg·g -1 for West Lake,equal to the amounts of phosphorus in the sediments of eutrophicated deep reservoirs and shallow lakes in other parts of China,suggesting that the sediment might exceed the water as a major source of dissolved phosphorus.Additionally,inorganic phosphorus was higher than organic phosphorus forms in each sediment and Fe-P was the major phosphorus form in the inorganic phosphorus,respectively.Fe-P consisted of35%~45%in Shanzi Reservior surface sediment and of60%in West Lake surface sediment,respectively.The low proportion of Ca-P fraction in each sediment may suggest that most proportion of the phosphorus be from anthropogenic source.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第2期362-365,共4页
Journal of Agro-Environment Science
基金
福建省自然科学基金项目(D0310015)
福建省教育厅A类(JA03029)
关键词
富营养化
沉积物
磷形态
福建省
eutrophicated lakes
surface sediment
phosphorus
Fujian Province
