Water quality scavenging agent for high-density cultivation system for penaeus orientalis

Abstract

The invention relates to a water quality purificant of a prawn high density culture system, which is prepared by organic carbohydrate and useful bacterium, glucose is 1 Kg, sucrose is 3-4 Kg, starch is 4-6 Kg, and the useful bacterium is 1Kg. The useful bacterium is bacillus subtilis used zeolite powder as a carrier and rhodopseudomonas palustris. When in use, the purificant is used according to 100-200 percent of day feeding scale of the prawn compound feed of a prawn culture pool, and is diluted by water and then splashed into the culture water body evenly, and is added one time by every 5-7 days. The water quality purificant is characterized in that syrup in the water quality purificant can be directly utilized by the bacterium, the starch is utilized by the bacterium after being decomposed into small molecules, and can provide an organic carbon source continuously for the bacterium growing; in particular the water quality purificant of the invention does not contain albumen, so the nitrogen load adding in the culture water body by using the organic carbon source such as corn flour or gooey, etc. is effectively avoided. The water quality purificant is applicable to the closed or semi enclosed prawn high density culture system.

Description

technical field [0001] The invention belongs to aquaculture water purification technology, in particular to a water purification agent for a closed or semi-closed shrimp high-density culture system. Background technique [0002] With the development of large-scale aquaculture industry, especially the development of intensive high-density aquaculture industry, the pollution of aquaculture water quality has become an important factor restricting the healthy development of fish and shrimp farming. Studies have shown that the protein utilization rate of shrimps to artificial compound feed is usually below 20%, and about 80% of the nitrogen in the feed is discharged into the water environment, and becomes harmful ammonia nitrogen, nitrite nitrogen, etc.; Or in the semi-closed shrimp high-density culture system, the accumulation of inorganic nitrogen such as ammonia nitrogen and nitrite nitrogen is particularly serious, which brings great harm to the healthy growth of cultured shr...

AI Technical Summary

Problems solved by technology

The above method has played a certain role in improving the water quality of prawn culture, but there are the following problems: (1) in the water body, the adsorbents such as splashing zeolite powder are only the inorganic nitrogen in the adsorption culture water body, and the inorganic nitrogen has not been removed from the culture environment; ( 2) Phytoplankton are prone to decay and damage the water quality of aquaculture; (3) When using beneficial bacteria such as Bacillus and Lactobacillus, the organic carbon source suitable for bacteria in the aquaculture water is insufficient, which limits the growth of bacteria, thus affecting the bacteria's ability to use. Absorption of nitrogen (inorganic nitrogen and organic nitrogen) in aquaculture water; (4) Reducing the protein content in feed affects the nutrition and growth of prawns