Feed for facilitating swimming crabs to breed red cream and preparation method of feed

Abstract

The invention belongs to the technical field of feeds and in particular relates to a feed for facilitating swimming crabs to breed red cream. The feed comprises the following components in percentage by weight: 30-60 percent of fish meal, 10-30 percent of an adhesive, 1-5 percent of shrimp shell meal, 0.5-3 percent of Haematococcus algae powder, 0.2-1 percent of cassava modified starch, 0.2-1 percent of astaxanthin grease, 1-3 percent of fish oil, 2-6 percent of phagostimulant, 0.1-1 percent of carrageenan, 0.1-1 percent of xanthan gum, 0.02-0.5 percent of vitamins, 0.1-1 percent of choline chloride and 20-40 percent of water. According to the formula, the feed can provide basic nutrient elements required in the cream breeding period of the swimming crabs; particularly, as the Haematococcus algae powder and the astaxanthin grease are added to the feed, the purity of the crab cream can be effectively enhanced due to natural astaxanthin substances contained in the red globose alga powder and the astaxanthin grease, and the color of the crab cream is natural and stable; and moreover, the phagostimulant can stimulate the olfactory organ of the swimming crabs, so that the food intake of the crabs is enhanced, and the utilization rate of the feed is improved. The invention also discloses a preparation method of the feed. The feed prepared to be in a sausage type is conveniently eaten by the crabs, the feeding amount is easier to control and regulate, and a water body is not polluted by the feed.

Description

technical field [0001] The invention belongs to the technical field of feed, and in particular relates to a feed for promoting the breeding of Portunus crabs and a preparation method thereof. Background technique [0002] Swimming crab is an important economic crab in my country. It grows rapidly and has rich farming profits. It has become one of the important aquaculture species in the eastern coastal areas. Investigation finds that prior art portunus cultivation adopts fresh and live materials such as small fish and shrimp, snails and shellfish as feed, and has not been improved all the time. On the one hand, the use of this kind of feed not only has high cost and consumes natural resources, but also easily causes the water quality of aquaculture to be corrupted, causes diseases, and leads to a reduction in shuttle production. On the other hand, feeding with fresh and live bait has obvious regional characteristics, and it is easy to get it in the eastern coastal areas, bu...

AI Technical Summary

Problems solved by technology

A red cream crab compound feed and its preparation method are disclosed on the website of the State Intellectual Property Office of China. The compound feed has complex ingredients, and although it can meet the basic physiological needs of river crabs during the breeding period, it is extruded and granulated at high temperature (above 100°C). The active ingredients such as antioxidants, astaxanthin, and vitamin E in the granular feed prepared by the method will be oxidized or partially invalidated. In addition, the granular feed is easy to swell and dissolve in water, which increases the difficulty of feeding crabs, and the feed utilization rate is not high; China On the website of the State Intellectual Property Office, a Portunus compound feed that strengthens the color of the crab paste is disclosed. In order to increase the color of the crab paste, 300-1000 ppm of carotene or derivatives are added to the feed. The color of the crab paste is red, but it increases Feeding cost