Ditch system for governance of lake branch zizania caduciflora of big lake cultivation

Abstract

The invention relates to the field of aquaculture, in particular to a ditch system for governance of lake branch zizania caduciflora of big lake cultivation. The ditch system for governance of lake branch zizania caduciflora of big lake cultivation is composed of transverse ditches excavated along the shoreline and longitudinal ditches intersecting with the transverse ditches and extending to the lake center. The transverse ditches are tightly close to the shoreline in the dry season and are 2-3 m wide, and are dug to hard subsoil by excavating away sludge, and the water depth is no less than one meter in the dry season. The transverse ditches are spaced by 50-200 meters. The longitudinal ditches and the transverse ditches are connected in an intersecting mode, and the longitudinal ditches extend to the lake center. The length of the longitudinal ditches is greater than that of the zizania caduciflora dense region, and the longitudinal ditches are 2-4 meters wide and are dug to the position where the lake bottom sludge is excavated away. By excavating the ditch system in the lake branch zizania caduciflora dense region, natural circulation of the zizania caduciflora dense region and a big lake water body is prompted, the water body cultivation ecology is improved, harmful weeds are turned into beneficial weeds, and the big lake aquaculture benefits are greatly improved.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a ditch system for the management of lake branch bamboo grasses cultivated in large lakes. Background technique [0002] With the rapid development of the aquaculture industry, the farming method has changed from extensive farming to intensive farming. However, while increasing production and increasing benefits, it has also produced negative effects: serious water pollution, increased suspended solids in water, BOD (biological Oxygen consumption), COD (chemical oxygen demand), nitrogen, phosphorus content increased, dissolved oxygen decreased, a large number of blue-green algae occurred, and the water environment deteriorated, resulting in frequent occurrence of fish diseases and great economic losses. Therefore, creating a good aquaculture water environment is not only the need for healthy fish farming, but also the need for protecting the ecological environment. Water environmental ...

AI Technical Summary

Problems solved by technology

The measure of using aerators to control ammonia nitrogen in pond water is not applicable to large lake culture; the use of photosynthetic bacteria to splash only has a certain short-term effect

Planting a small amount of aquatic phytoplankton such as water hyacinth, etc., when the planting area does not exceed 1-5%, can absorb toxic substances such as ammonia nitrogen; but natural bamboo grass is like a piece of airtight natural jungle, which prevents the flow of water and shields toxic and harmful substances from the outside world. The exchange will deteriorate the water quality of the waters densely covered with wild rice weeds, destroy the ecology of the water body, and greatly reduce the breeding benefits

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