Ecological control method for auriculana

A control method and radish snail technology, which are applied in chemical instruments and methods, cleaning of open water surfaces, biological water/sewage treatment, etc., to achieve the effect of easy popularization and application, and simple and easy operation

Inactive Publication Date: 2008-05-07
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Ecological control method for auriculana
  • Ecological control method for auriculana

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[0023] A water management company in Nanjing has contracted two fish ponds by the East Taihu Lake as a breeding base for submerged plants - bitter grass, with a total area of ​​2 mu. In May 2007, a large number of turnip snails appeared in the bitter grass pond, with a density as high as 500 / m 2 . Due to the large amount of grazing by radish snails, a large number of broken bitter grass leaves floated on the water surface in just a few days, and the growth of bitter grass was greatly restricted. After adopting the comprehensive control method in this patented technology, the density of radish snails in the pond will reach 100 / m in less than ten days 2 , bitter grass can recover and grow rapidly.

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Abstract

The invention relates to an ecological control method of Radix snails, which includes the aspects as follows: organism manipulation: herring and grazing snails are cultured in the water according to the principle of the food chain; the depasturing of water fowls: water fowls which can graze snails are farmed, the water level is regulated above the height of a sunken plant before the depastruring, thus the water fowls can not graze the water weed; ecological harvest: 8 am to 10 am and 16 pm to 18 pm of every day, the snails are netted for once respectively based on the habit of the radix snails floating on the water surface. The aforesaid aspects can be freely picked once or be freely combined. The invention can effectively control the quantity of the radix snails, preserve the balance of the sunken plants in the eutrophication water and have important significance on the ecological recovery in the eutrophication water. The invention has the advantages of reliable technique, simple and easy operation and low cost.

Description

technical field [0001] The invention relates to the restoration of eutrophic water bodies, in particular to an ecological control method for radish snails, including biological manipulation technology, water fowl stocking technology and ecological harvesting technology. The method can effectively curb the expansion of the radish snail population, reduce the adverse effects of snail grazing on the growth of aquatic plants, thereby benefiting the recovery and stability of aquatic plants, and plays an important role in guaranteeing the restoration of eutrophic water bodies. It belongs to the field of new technology of environmental protection. Background technique [0002] The eutrophication of water body caused by the excessive input of nutrients (mainly nitrogen and phosphorus) is one of the water environment problems that are widely concerned in the world. The multi-steady state theory shows that, at a certain degree of eutrophication, in addition to the mixed water system ...

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Application Information

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IPC IPC(8): C02F3/32E02B15/04
Inventor 李宽意胡耀辉刘正文文明章
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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