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Seaweed is a self-operated plant capable of photosynthesis in marine lakes, with high protein, low fat, and low sugar content. Seaweed is rich in nutrients and balanced. As an excellent feed additive for livestock and poultry, it has good results and wide prospects in aquaculture production. Application in Poultry Feeding Adding 3% seaweed powder to the layer chicken feed can replace the same percentage of bran in the diet. This not only saves feed, reduces feed cost, but also improves feed conversion rate, and egg production rate can be improved. 6%, the broken egg rate decreased by 50%. Adding 2% of seaweed powder to the broiler chicken feed can increase the growth rate by 14% to 19%, increase the feed conversion rate by 12% to 14%, and significantly reduce the mortality rate. Russian scientists fed broiler chickens with a feed formulation containing cyanobacteria. Daily gains of broilers increased by 6.2% per 15 mg, and the survival rate of chicks increased by 4.3%. Application in pig rearing According to research from Norwegian scientists, adding 3% seaweed powder to pig feed, plus a small amount of calcium, phosphorus and VD, can meet the nutritional needs of pigs for all minerals and vitamins. Adding 2% to 3% of algae powder in the growing pig diet can increase the daily gain by 18%, and the ratio of feed to meat can reach 3:1, saving 3% to 4% of concentrated feed and reducing the incidence by 5%. According to research, adding 2% of seaweed powder to pig feed has obvious effects in the early period (before 60kg), and the daily weight gain is 68g-73g higher than that in the control group, but the rearing effect (60kg later) is not obvious. Adding 4% seaweed powder to the nursing sow's feed increased the piglets' weaning weight, survival rate and disease resistance. Application in Ruminant Feeding Japan and Norway scientists have found that adding dairy algae powder to dairy cows can increase milk production by 6%-6.8%, and cows' estrus rate and pregnancy rate are greatly improved. Feeding 35g of algae powder each day in sheep feed can increase the yield of wool by 2%, and the survival rate of lambs is greatly improved.