Kelp is an important species of algae cultivation in coastal China. Kelp is processed into kelp powder and used as a feed additive for livestock and poultry, which can improve feed nutrient structure. Adding 2% to 5% kelp powder in the layer chicken feed can increase the egg production rate of the laying chicken by about 15%, and it can also increase the iodine content in the egg yolk by 14 to 20 times. If 5% kelp powder is added, the fertilization rate of layers will increase from 65% to 85%, and the hatching rate will increase by 82% from 68%. Adding 5% seaweed powder to the feed to feed quail, the egg production rate increased by 8%, the mortality rate decreased by 10%, and the sub-egg rate decreased by 8%, and the color of the egg yolk increased. Adding 3% kelp powder to feed the Dutch pig, the daily gain increased by 25%, and the feed conversion rate increased by 18%. Adding 2% to 4% kelp powder to feed black phoenix chicken can increase the survival rate by 10% and increase the weight by 280 grams in 10 weeks.
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