Preparation and use method of fermented material used for bait biological bed mainly used to raise Macrobrachium japonicus and interculture river crab

Abstract

The invention relates to methods for preparing and applying a fermented feed for a food organism bed for mainly breeding macrobrachium nipponensis and intercropping river crabs. According to the preparing method, a batch mixture which is fermented by using probiotics is fed to a pond, and through rotary tillage, a 'food organism bed' which takes the fermented feed as a main component is established at the bottom of the pond, the fermented feed in the 'food organism bed' can be directly taken by shrimps and crabs, and at the same time, benthonic animals and aquatic plants such as water earthworm, chironomidae larvae, spiral shells and aquatic plants which can be used as a feed for the macrobrachium nipponensis and the river crabs can be cultivated on a habitat area of the shrimps and the crabs, so that the intensity of food competition habitat area competition is alleviated, the survival rate of the intercropped river crabs is increased, and the improvement of the breeding yield and the benefits of the shrimps and the crabs are facilitated. To ensure that a high propagation capability of demersal food organisms in the 'food organism bed' is stilled maintained in summer, oxygen cylinders and micropore aerators are adopted for double-oxygen supply, and the oxygen cylinders are coupled with micropore aeration tubes and are switched on at regular time in different periods each night in summer.

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] Improving the production of Macrobrachium japonicus is of great significance to increasing the income of shrimp farmers, and common measures to increase production and efficiency are: ① Increase the stocking density of Macrobrachium japonicus, so that the stocking density per unit area increases from 50,000 to 80,000 fish / mu To 100,000-150,000 / mu, this method can increase the breeding output, but the seedling cost of Macrobrachium japonicus more than doubles, and th...

AI Technical Summary

Problems solved by technology

[0002] Improving the production of Macrobrachium japonicus is of great significance to increasing the income of shrimp farmers, and common measures to increase production and efficiency are: ① Increase the stocking density of Macrobrachium japonicus, so that the stocking density per unit area increases from 50,000 to 80,000 fish / mu To 100,000-150,000 / mu, this method can increase the breeding output, but the seedling cost of Macrobrachium japonicus more than doubles, and the average size of commercial shrimp grown under high-density farming conditions is relatively small, and the sales price is low. Therefore, the synergistic effect is not significant; 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 increasing the protein content can speed up the growth rate of Macrobrachium japonicus, the price of high-protein feed is relatively high, and the cost of breeding will increase significantly; ③ Increase the amount of artificial feed or small miscellaneous fish to increase the nutritional intake of Macrobrachium japonicus amount, but excessive feeding will inevitably result in waste and increase in feeding costs, and it is easy to cause diseases; ④ Stocking large-scale shrimp seedlings increases the stocking size of shrimp seedlings from 3000-5000 tails / kg to 1000 tails / kg, so as to raise The added value of the shrimp can be improved; ⑤Cultivate natural bait by fertilization or feed low-value waste as part of the bait source for Macrobrachium japonicus. Although the cost of this method is low, it will cause damage to the water body. Pollution

[0003] Interculture of river crabs in giant macrobrachium ponds can increase additional income, but the food and living habits of the nested river crabs are similar to those of macrobrachium japonicus, and the competition for food and habitat is not conducive to the improvement of the survival rate of river crabs and the benefits of interculture. Therefore, reducing the intensity of competition and solving the problem of the survival rate of river crabs in nesting has become the key to whether shrimp farmers can obtain higher income