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Method for utilizing carbonate type bogged heavy saliue-alkali lake for fishery industry

A carbonate type, swamp technology, applied in land preparation methods, applications, agriculture, etc., can solve the problems of complex and changeable water quality, high alkalinity and high salinity

Inactive Publication Date: 2003-03-26
CHANGCHUN INST OF GEOGRAPHY CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The present invention aims at the problems of high salinity, high alkalinity and complex and changeable water quality of carbonate-type swampy severely saline-alkaline lakes, etc., through dredging and repairing dikes, expanding water bodies, building combined fish ponds and other technical measures, the purpose is to provide A method for fishery utilization of carbonate-type swampy severely saline-alkaline lakes

Method used

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Examples

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Embodiment

[0012] Example: Sanba Pao was originally a large natural lake in the Nen River system, with a historical water surface of 583 hectares, rich in fish resources, and the annual output of adult fish once reached 200,000 kg. After reclamation and drought, the ecological environment deteriorated, fish and shrimp resources decreased sharply, aquatic economic plants degenerated, and concentrated into severe saline-alkaline marshes. The current water surface is only 447 hectares, the pH value of the water quality is 9.22, the salt content is 8.73 g / L, and the total alkalinity is 14.77 mmol / L. The output of adult fish has dropped to 45,000 kg. The bubble is 1500 meters away from the water source Taoer River Irrigation Canal. During the experiment, a total of 47,200 cubic meters of silt was dredged, 107 ponds were excavated, and 2,810 meters of diversion channels were repaired. After the transformation, the water surface area in the lake reaches 527 hectares, and the water depth is 1.5...

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Abstract

The present invention relates to a method for utilizing carbonate type swampiness heavy saline lake to develop fishery. Its technical measures include: desludging repairing dykes; expanding water body; building combined high-quality fishpond to carryout breeding in lake, fishponds-connected collection breeding and increase brand-name and high-quality aquatic varieties. Said invention can obviously improve ecological environment of water body, can reduce the pH value of lake water body to 8.2-8.7, can reduce total alkalinity to 5-6 millimole / l, the salt content of soil is reduced to 3-5g / kg, and the salt content of water body can be retained to 2-3 g / l.

Description

technical field [0001] The invention belongs to the aquaculture technology in the field of agriculture, and relates to the comprehensive utilization of fishery in carbonate-type swampy heavily saline-alkaline lakes. Background technique [0002] Swampy saline-alkaline lakes are widely distributed in saline-alkaline areas in northern China. There are more than 900 lakes in the Songliao Plain in China alone, with a total area of ​​more than 130,000 hectares, all of which are carbonate lakes. Historically, these lakes were all natural lakes within the water system, with an average water depth of about 2.0 meters, rich in aquatic biological resources such as fish, shrimp, and shellfish. Later, due to drought and land reclamation, they were isolated from the water system, and the ecological environment deteriorated. The main manifestation is lake basin silting, the lake bed is silted up, the water surface shrinks, the water depth is reduced to below 1.0 meters, the salinity rises...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01K61/00
CPCY02A40/81
Inventor 杨富亿宋凤斌邵庆春李景林陈国双
Owner CHANGCHUN INST OF GEOGRAPHY CHINESE ACAD OF SCI
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