Method for improving eutrophic water body by planting vegetables on water surface

Abstract

The invention relates to a method for improving an eutrophic water body by planting vegetables on a water surface, which comprises the following steps of: (1) selecting fresh water of which the nitrogen content is more than or equal to 0.5 mg / L, phosphorus content is more than or equal to 0.05 mg / L and potassium content is more than or equal to 0.5 mg / L in a water body; (2) enclosing a vegetable planting area; (3) arranging the vegetable planting area; (4) manufacturing a floating planting bed; (5) selecting vegetable varieties; (6) planting vegetables; (7) managing, namely controlling the speed of water flow according to the growth vigor of the vegetables and a detection result of water quality, so that compared with a water inlet in the planting area, at a water outlet, the total nitrogen content is reduced by 30 to 90 percent, the total phosphorus content is reduced by 20 to 70 percent, and the potassium content is reduced by 10 to 50 percent while the growth vigor of the vegetables is ensured; and (8) selecting the vegetable varieties which is suitable to be planted in different seasons, and planting in turn throughout the year. In the method, the eutrophic water body is improved effectively by a biological cleaning method, and compared with physical and chemical means of managing the eutrophic water body, the method has obvious effect and low investment cost and is convenient to popularize and perform large-scale planting; and the vegetables are planted without applying fertilizer and spraying pesticides, so a new pollution source is not generated, and the planted vegetables reach the standard of green organic vegetables. By the method, resource utilization is maximized, and vegetable baskets of people are abundant while the eutrophic water body is managed. The production management and monitoring are convenient, so the method is particularly suitable for the large-scale planting.

Description

Technical field [0001] The present invention involves a method of governance of the abundance of slow -flowing water body, which is specifically a method that improves the nutritional water body by planting vegetables on the water surface. Background technique [0002] Under the influence of human activity, the nutritionalization of water bodies is under the influence of human activity. A large amount of mineral nutrient salt such as nitrogen and phosphorus required by creatures enters a large amount of mitigated water bodies such as lakes and estuaries., A large number of fish and other creatures die.The essence of nutritional is that nutritional elements accumulate in the water environment, causing a series of complex changes in the water body to a series of physics, chemistry and biology.In the process of rich nutrition, nutritional salts such as nitrogen and phosphorus are the material basis for lake aquatic creatures, especially the growth and reproduction of algae, and the ...

AI Technical Summary

Problems solved by technology

The use of biological floating beds to control eutrophic water bodies is gradually becoming a key technology for the restoration of damaged aquatic ecosystems. The research and application of floating bed systems in China is increasing, and the types of plants have also developed from rice, ryegrass and cress to vetiver and canna. , water spinach and other aquatic plants or water-loving plants, although these plants have a certain ability to purify water, some can also be used as feed, fuel, etc., but the overall economic benefits are not high, and some plants, such as water hyacinth, It has a strong ability to expand. If it is not well controlled, it will easily flood and wither in autumn and winter.

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