长江和嘉陵江交汇段营养限制因子的试验

重庆三峡库区富营养化发生务件与机理研究中，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（ACP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．

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

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.