水生蔬菜浮床对污染水体的修复机制及应用

Repair Mechanism and Application of Aquatic Vegetable Floating Bed to Polluted Water

我国水生蔬菜种类繁多,利用蔬菜浮床对水环境进行原位修复的机制主要是激发水生蔬菜体内相关酶活性,促进其对水体营养物质的吸收;为根际微生物创造适宜条件,促进其对营养物质的分解;利用浮床自身对污染物的拦截、过滤、沉淀等。蔬菜浮床净水效果受蔬菜种类,水体富营养化程度,浮床覆盖面积,气候变化等因素影响。今后应着力从蔬菜组合、浮床改进等方面探索生态浮床的构建和管理技术,实现经济效益和生态功能的有机结合。

The main mechanism of utilization of vegetable floating bed for in situ remediation of water environment is to stimulate enzyme activities of aquatic vegetables to promote the absorption of nutrients in the water, to create suit- able conditions for microorganisms in the rhizosphere of vegetables to promote the decomposition of nutrients, using the floating bed on the pollutant interception, filter precipitation, etc. The effect of vegetable floating bed was affect- ed by the types of vegetables, the degree of eutrophication, the coverage area of floating bed and the climate change. In the future, it is necessary to explore the construction and management technology of ecological floating bed from vegetable combination and floating bed improvement, to realize the organic combination of economic benefit and eco- logical function.