Preparation method and use method of fermentation material of bait biological bed for mainly breeding river crabs and cooperatively breeding macrobrachium nipponensis

Abstract

The invention relates to a preparation method and a use method of a fermentation material of a bait biological bed for mainly breeding river crabs and cooperatively breeding macrobrachium nipponensis. The method comprises the steps of feeding a probiotics fermented batch mixture into a pond, carrying out rotary tillage for building the 'bait biological bed' which takes the fermentation material as the main component at the bottom of the pond, wherein the fermentation material in the 'bait biological bed' not only can be directly fed to shrimps and crabs, but also can be used for breeding benthonic animals and water plants such as tubificidae, chironomidae larvae, spiral shell and aquatic weeds in the habitat of the shrimps and the crabs, and the benthonic animals and water plants can be taken as the bait of the river crabs and the macrobrachium nipponensis, so that the intensity of food competition and habitat competition can be reduced, the survival rate and the development specification of the cooperatively bred macrobrachium nipponensis can be improved, the shrimps and the crabs can better grow, and the aquaculture yield and the benefit are increased. In order to guarantee that the benthic bait organisms in the bait biological bed still have high multiplication capacity even in summer, the bait biological bed is supplied with oxygen by an oxygen bottle and a microporous aerator, and the oxygen bottle and a microporous aerator pipe are connected with each other.

Description

technical field [0001] The invention relates to a shrimp and crab nesting method that puts materials that have been fermented by probiotics into ponds, and makes the fermented batch materials be used by river crabs, giant river prawns and benthic organisms, and at the same time can promote the proliferation of aquatic plants , especially a method of cultivating river crabs and nesting Macrobrachium japonicus by converting cheap raw materials and wastes into high-quality natural bait. Background technique [0002] How to improve the efficiency of crab breeding is a common concern of crab farmers, and common measures to increase production and efficiency are: ① increasing the stocking density of river crabs is a common technical measure to increase production and benefits, but increasing the stocking density of crab seedlings will greatly increase the cost of breeding In addition, the average size of commercial crabs raised under high-density breeding conditions is relatively ...

AI Technical Summary

Problems solved by technology

[0002] How to improve the efficiency of crab breeding is a common concern of crab farmers, and common measures to increase production and efficiency are: ① increasing the stocking density of river crabs is a common technical measure to increase production and benefits, but increasing the stocking density of crab seedlings will greatly increase the cost of breeding In addition, the average size of commercial crabs raised under high-density breeding conditions is relatively small, and the sales price is relatively low. At the same time, the cannibalism rate among crab seedlings has increased significantly, and the survival rate has decreased. Therefore, the method of increasing the breeding density cannot be significantly improved. Improve breeding efficiency; ②Increase the crude protein content in the artificial feed, so that the crude protein in the feed increases from 28%-34% to more than 40%

Although high-protein feed can speed up the growth rate of river crabs, the price of high-protein feed is high, and the cost of breeding increases greatly; ③Increase the amount of artificial feed or small miscellaneous fish to increase the nutrient intake of river crabs, but Excessive feeding will inevitably lead to waste of feed, increased feeding costs, water pollution, and easy to cause diseases; ④ Increase the stocking specification of buckle crabs from 200 / kg to 100 / kg, so as to grow commercial crabs of larger sizes, Increase the added value of crabs; ⑤ Cultivate natural bait by fertilization or feed low-value waste as part of the bait source for river crabs and giant river prawns. Although this method reduces the cost of breeding, it pollutes the water body