High-calcium fermented feed for young crabs

Abstract

The invention discloses a high-calcium fermented feed for young crabs. The high-calcium fermented feed comprises the following components in parts by weight of 100 parts of a basal feed, 3-5 parts ofzymogen, 2-3 parts of calcium, 0.3-0.5 part of vitamin C and 0.01-0.02 part of trace elements. The high-calcium fermented feed disclosed by the invention has the advantages that the feed contains highsoluble calcium, chelating calcium beneficial for crabs to absorb is formed through fermentation, and the shelling expansion coefficient of raised crabs is as high as about 20%; the proportion of protein, fat and carbohydrate in the feed is balanced, the high-calcium fermented feed is suitable for meeting of growth requirements of the crabs, and the growth speed is high; and the intestinal tractfunctions of the crabs are increased, the disease resistance is improved, and the survival rate is increased by about 10%.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a high-calcium fermented feed for crabs. Background technique [0002] Crabs have a wide variety of food, small fish and shrimp are their favorite, but some crabs eat seaweed, even animal carcasses or plants, they spend most of their time looking for food, they are not picky eaters, as long as they can chew All food can be eaten. There are many kinds of feeds for artificially cultured crabs, but many of them are animal feeds, and fresh or frozen small fish and fishmeal are mostly used as the main raw materials, which have the disadvantages of destroying fish resources and easily polluting water sources. Crabs are generally cultured for two years. In the first year, there are megalopa cultured to buckle crabs, and in the second year, from buckle crabs to adult crabs. After the megalopa molts and grows, it grows into a crab shape. The larvae of the first 1 to 5 molts are ca...

AI Technical Summary

Problems solved by technology

From the stage of megalopa to crab seedlings, a large amount of nutrient intake is required to ensure the growth of the new shell after shelling, especially a large amount of calcium. If calcium intake is insufficient or calcium is not absorbed, the expansion coefficient of shelling will decrease. Small, which directly leads to the small size of crabs and affects economic benefits

Moreover, the range of activities of the artificially cultured crabs is limited, the amount of exercise is reduced, and the intestinal function of the crabs is degraded, resulting in a decline in disease resistance, which affects the individual size and overall output of the crabs.