桓龙湖综合营养状态指数为41，为中营养状态（Mesotropher），其中总氮达到轻度富营养（Light eutropher）化，其营养状态指数为50.3，极具开发价值。
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对7座重点水源地水库进行营养状态评价，有5座水库处于中营养状态，2座水库处于轻度富营养状态。
The states of 7 major water source reservoirs were evaluated, the results showed that 5 of 7 reservoirs were middle nutrition, 2 of 7 reservoirs were light nutrition.
湖泊名称营养状态指数富营养程度太湖60.93 中度富营养巢湖58.31 轻度富营养滇池（外海） 66.12 中度富营养。
Lakes Index of Eutrophication Extent of Eutrophication Tai Lake 60.93 Medium Chao Lake 58.31 Light Dian Lake (outer lakes) 66.12 Medium.
利用小型人工基质无土栽培萱草，研究其在轻度和重度富营养水中的生长及净化能力。
The growth and the purification ability of Hemerocallis fulva Linn. in heavy and light eutrophic water were studied by means of soilless cultivation technique on artificial substratum.
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