长江和嘉陵江交汇段营养限制因子的试验  

Experimental Study on the Nutrition Restrictive Factors of the Changjiang and Jialing Rivers Interjunction

作　　者：郭蔚华[1] 罗荣祥[1] 张智[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2006年第1期98-101,共4页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50178070);博士点基金资助项目(20010611020)

摘　　要：重庆三峡库区富营养化发生条件与机理研究中,针对营养限制因子与富营养化的重要性和复杂性,通过藻类潜力试验(AGP试验)确定长江和嘉陵江交汇段水体营养限制因子.研究认为:单独的氮对藻类增长无明显促进作用,磷则构成水体藻类增长的限制性因子;TN/TP值高藻类现存量就小,TN/TP值低藻类现存量就大;原水中磷含量越高,添加磷对藻类增长的促进作用越大.这为重庆两江交汇段水体富营养化发生条件及机理分析提供了重要参数.The authors study on condition and mechanism of eutrophication in Three Gorges Reservoir Area （TGRA） in Chongqing, aiming at the importance and complexity of nutrition restrictive factor and eutrophication. By AGP experiment, the nutrition restrictive factors of the Changjiang and Jialing Rivers interjunction is confirmed is confirmed. The experimental results show that： Single nitrogen is not an obvious stimulus to growth of algae, while phosphorus acts as the limiting factor of that; When TN/TP is high, the standing crop of algae is small; when TN/TP is low, the standing crop of algae is large; The concentrate of phosphorus in the water is higher, the effect accelerating algae and increaseing through adding phosphorus is more strong. The experimental results provide us with important parameters to understand the conditions of eutrophication and analyse its mechanism.

关 键 词：富营养化 营养盐 限制性因子 AGP试验 

分 类 号：X171.1[环境科学与工程—环境科学]