Bicarbonate saline-alkali soil pond circulation water ecological breeding system and breeding method

Abstract

The invention relates to the field of ecological breeding, and provides a bicarbonate saline-alkali soil pond circulation water ecological breeding system. The bicarbonate saline-alkali soil pond circulation water ecological breeding system comprises a breeding pond, an ecological slope protection and an ecological purifying pond, wherein the breeding pond comprises a fish breeding region and a shrimp breeding region; a precipitation canal is arranged on the side edge of the breeding pond; breeding tail water generated in the breeding pond is drained to the precipitation canal for precipitation, then the precipitated breeding tail water overflows in the ecological slope protection; the breeding tail water subjected to filtration and adsorption treatment of the ecological slope protection flows in the ecological purifying pond located on the slope bottom side of the ecological slope protection; and the breeding tail water after treatment by the ecological purifying pond is completed isintroduced into the breeding pond by a reflux pipeline for recycling. Besides, the invention provides the breeding method for performing ecological breeding by the ecological breeding system. The breeding system and the breeding method disclosed by the invention adopt a multi-nutrition level integrated breeding pattern and biologic and ecological purifying measures on saline-alkali soil pond breeding tail water, so that the quality safety of aquatic products can be guaranteed, and the comprehensive economic benefits of breeding can also be increased; and the breeding system and the breeding method have wide popularization prospects.

Description

technical field [0001] The invention relates to the field of ecological breeding, more specifically, to a bicarbonate saline-alkali pond circulating water ecological breeding system and a breeding method. Background technique [0002] Saline-alkali water is the third water resource different from seawater and fresh water. In recent years, due to the delineation of red lines such as nature reserves and basic farmland and the introduction of new environmental protection laws and regulations, the space for fishery development has been limited. Rational development of saline-alkali wasteland and development of ecological aquaculture have become a direction for the green development of aquaculture. [0003] At present, most of the tidal flats of the Yellow River in Shanxi are bicarbonate-type saline-alkali land, and the groundwater has the characteristics of high pH, ​​high carbonate alkalinity, and ion ratio imbalance. Due to the influence of water source conditions and geograph...

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Problems solved by technology

[0003] At present, most of the tidal flats of the Yellow River in Shanxi are bicarbonate-type saline-alkali land, and the groundwater has the characteristics of high pH, ​​high carbonate alkalinity, and ion ratio imbalance. Due to the influence of water source conditions and geographical environment, aquaculture in saline-alkali land is mostly based on adding water. Mainly water replenishment, the amount of water exchange is limited, and generally the water is rarely changed. The regulation of water quality in the breeding process becomes the key point, while the traditional pond culture mode is characterized by high density, high feeding rate, and high water exchange rate. High bioburden and high input are the most notable characteristics of this mode. A large amount of residual bait, fertilizer and biological metabolites accumulate, which reduces the self-purification ability of the aquaculture water body, and the eutrophication of the water body is significant. The self-pollution of the aquaculture water body exceeds that of the pond water body. At the same time, the deterioration of the exogenous water environment also leads to the aggravation of the hydraulic load capacity of the pond and the frequent occurrence of fish diseases, causing huge losses to the aquaculture industry and causing great pressure on the water ecological environment.

[0004] The core of the pond circulating aquaculture model is the ecological management of the aquaculture tail water. At present, the salt stress of the saline-alkali water body on animals and plants under the condition of saline-alkali land leads to poor stability of the pond aquaculture water body, and the ion exchange between the bottom of the pond and the water body aggravates the saline-alkali characteristics of the pond water body. The stability of the water body should be realized on the basis of the comprehensive utilization of the multi-nutrient levels of the water body and the timely discharge of the tail water at the bottom of the pond.

In addition to the existing aquaculture conditions in saline-alkaline areas, the aquaculture tail water treatment process mainly involving ecological ditches, filter dams, aeration tanks, and ecological treatment pools is not suitable for the ecological purification of aquaculture tail water in saline-alkali areas

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