Trepang sheet feed stuff and method of preparing the same

Abstract

The invention relates to flake-shaped feed for sea cucumber and a preparation method thereof. The ingredients in the feed and the ratios thereof are as follows: sargassum thunbergii dried powder 30%, fish meal 4.5%, fresh kelp 20%with 70% liquid water content, dusty yeast 5%, corn protein 8%, compound enzyme 0.5%, compound vitamin 1%, mineral salt 1%, water 10% and muddy sand 20% with grain diameter of about 100 micron. The preparation method comprises the steps of adding 50% water to the fresh kelp, grinding the kelp with water for 6-7 times through a stuff grinder, adding other ingredients for stirring uniformly after degumming, extruding the mixture of the kelp, the water and other ingredients through a bulking machine at a low temperature of 1-10 DEG C, slicing the mixture into 2mm thick, and drying. The feed in the invention can maintain the shape thereof for more than 24hr without shaping agent; the feed is 2mm thick so that the sea cucumber can easily get and eat the feed and feed consumption of 60% of powder feed is enough; the feed is rich in nutrition, thereby effectively improving the growth rate and the survival rate of the sea cucumber; water changing rate for the flake-shaped feed is only 50% of that for the powder feed, thus avoiding water pollution, reducing water consumption and curtailing production cost.

Description

technical field [0001] The invention belongs to aquaculture technology, and relates to a research, development and preparation method of sea cucumber flake feed. Background technique [0002] Apostichopus japonicus belongs to Echinodermata and Holothuroidea, and is an important marine economic animal in northern my country. Mainly distributed in Liaoning, Hebei, Tianjin, Shandong and the northern coast of Jiangsu. In recent years, with the improvement of people's living standards, people's awareness of health care has become stronger and stronger, the demand for sea cucumbers has also increased, and the price has been steadily rising. The huge market has stimulated sea cucumber farming in the northern coastal areas of my country. flourishing everywhere. [0003] In nature, sea cucumbers mainly feed on single-celled algae, protozoa, bacteria, seaweed fragments, organic debris and humus in the seabed sediment. They grab food through the tentacles around the mouthparts togethe...

AI Technical Summary

Problems solved by technology

In the actual operation process, the water body becomes very turbid after feeding such feed, and it takes more than 1 hour to purify the water before the feed sinks to the bottom of the pond. Many small feed particles will always be suspended in the water, which not only causes waste of feed , and it is also very easy to damage the water quality; another major disadvantage of the powder feed is that the amino acids, unsaturated fatty acids, soluble vitamins and some mineral salts in the feed will all dissolve into the water during the feeding process. Studies have shown (Zhu Wei et al. 2005 "Marine Science" A preliminary study on the protein and fat requirements of juvenile sea cucumbers; Chang Zhongyue et al. 2003 "Hebei Fishery" Factors affecting the growth and survival rate of sea cucumbers): The lack of the above nutrient elements affects the growth of sea cucumbers Both speed and survival rate have a significant impact