Preparation and use method of fermented material for bait biological bed for mainly raising Procambarus clarkii and intercultured river crabs

Abstract

The invention relates to preparation of a fermented material in a bait bio-bed for main culturing of procambarus clarkii and auxiliary culturing of river crab and an application method thereof. According to the method, a probiotic-fermented batch is poured into a pond, and a bait bio-bed with the fermented material as the main component is constructed at the bottom of the pond after rotary tillage. The fermented material in the bait bio-bed can directly be eaten by shrimps and crabs, and benthonic animals and aquatic plants such as Tubificidae, chironomidae larvae, spiral shell, waterweed and the like also can be cultivated in the shrimp and crab habitat to be used as the bait of procambarus clarkii and river crabs. Thus, food and habitat competition intensity can be reduced, and survival rate of river crabs can be raised. By dual oxygen supply of an oxygen tank and a micropore aerator in the bait bio-bed in summer, it is beneficial to raise culturing efficiency of demersal food organisms. The cultivated natural bait can be used to provide extra nutrition sources for the growth of macrobrachium nipponensis, and it is beneficial to raise culturing output and benefit of macrobrachium nipponensis.

Description

technical field [0001] The present invention relates to a kind of shrimp and crab cover which is put in the pond and fermented by probiotics to make the fermented material be used by Procambarus clarkii, river crab and benthic organisms, and at the same time can promote the proliferation of aquatic plants It is a breeding method, especially a method of raising Procambarus clarkii and nesting river crabs by converting cheap raw materials and wastes into high-quality natural bait. Background technique [0002] How to improve the efficiency of Procambarus clarkii farming is a common concern of shrimp farmers, and common measures to increase production and efficiency are: ① Increasing the stocking density of Procambarus clarkii is a common technical measure to increase production and benefits, but increasing the stocking density of shrimp fry It will greatly increase the cost of breeding, and the average size of commercial shrimp grown under high-density farming conditions is re...

AI Technical Summary

Problems solved by technology

[0002] How to improve the efficiency of Procambarus clarkii farming is a common concern of shrimp farmers, and common measures to increase production and efficiency are: ① Increasing the stocking density of Procambarus clarkii is a common technical measure to increase production and benefits, but increasing the stocking density of shrimp fry It will greatly increase the cost of breeding, and the average size of commercial shrimp grown under high-density farming conditions is relatively small, and the sales price is relatively low. The density method cannot significantly improve the breeding efficiency; ②Increase the crude protein content in the artificial feed, so that the crude protein in the feed increases from 28%-32% to more than 40%

Although high-protein feed can accelerate the growth rate of Procambarus clarkii, the price of high-protein feed is relatively high, and the cost of breeding increases greatly; ③ Increase the amount of artificial feed or small miscellaneous fish to increase the growth rate of Procambarus clarkii. nutrient intake, but excessive feeding will inevitably lead to waste of feed, increased feeding costs, water pollution, and easy to cause diseases; For the Procambarus clarkii aquaculture industry, it is difficult to popularize and apply it in a large area; ⑤ Planting a large number of aquatic plants can improve the breeding ecology and provide plant-based bait, but aquatic plants are one of the main foods of Procambarus clarkii. When the amount of aquatic plants is greater than the growth of aquatic plants, the aquatic plants in the pond will gradually decrease, and the stability of aquaculture ecology and the survival rate of aquaculture will decrease accordingly; ⑥ Cultivate natural bait by fertilization or feed low-value waste as Procambarus clarkii Part of the bait source, although this method reduces the cost of breeding, but there is pollution to the water body

[0003] Crab breeding in Procambarus clarkii culture ponds can increase additional income, but the crabs raised in nesting are similar to Procambarus clarkii in terms of food and living habits, and the competition for food and habitat is not conducive to the improvement of the survival rate of river crabs. Therefore, Reducing the intensity of competition and increasing the survival rate of crabs in nesting have become the key to whether crab farmers can obtain higher income