The production and feeding experiment of fermented feed in pond culture system of sea cucumber, Apostichopus japonicus

In order to develop feeds that can improve the nutrient absorption and health of sea cucumber, and reduce the incidence of disease, a kind of fermented feed was developed. Ratio of raw materials was 40:18:20:7:15 (kelp powder:scallop skirt powder:soybean meal:shrimp meal:sargassum powder). The processing procedure was as follows: the raw materials were mixed according to the ratio, fully immersed and ground, then 0.25%-0.5% of yeast products were added and the mixture was fermented for 72 h. The result of SDS-PAGE showed that high molecular weight protein was degraded into small molecular weight polypeptide during fermentation. During the 50-day feeding trial, the sea cucumber was fed with fermented feed and regular feed (unfermented) respectively. The feeding ratio was 3% of body weight. The result showed that the growth of sea cucumber fed with the fermented feed was significantly better than the regular feed after 50 days feeding trial. It is clear that the fermented feed is better than the regular feed an