Analysis of limiting factor to eutrophication and its countermeasures in Shahu Lake;

The results showed that water temperature(T),total phosphorus(TP),pH and secchi depth(SD) were significantly related factors to algal chlorophyll-a,and TP and water temperature were the limiting factors of eutrophication in Yanghe Reservoir.

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.

Research on Ecological Amplitude of Nutrition Restrictive Factors in the Changjiang and Jialing Rivers Interjunction in Chongqing;

As part of the series studies on ecological restoration technique in the littoral zone of Lake Dianchi,this paper investiga- ted the primary wetland environment and vegetation in the northeastern bank littoral zone of Lake Dianchi,the present environmen- tal bases,the target and feasibility for ecological restoration,the key limiting environmental factors and their controllability.

The results show that the order of main limited factors affecting rice yield planted in the acid yellow paddy soil is N>P>K>Ca>B>Mo and the best fertilizer application formulation for higher rice yield in the tested area is 17.