Blood meal, was a red-black-brown, more than 80% crude protein, crude fat than 4%, lysine up to 7% -9%, which is twice as fish meal from the ratio of the essential amino acids and total amino acids, the blood meal several ranking first protein animal feed. parts of pig and chicken factory plant has adopted the mutual compatibility of the same feather meal blood meal, amino acids may play a complementary role, you can replace all high-quality fish meal, pig and chicken day alone in the amount of 2% -4 %, the addition amount can replace lysine. Animal digestion rate of 90%, 7.5% lysine. High crude protein content of blood meal, fish meal and meat meal higher. Its amino acid composition is characterized by high lysine content of 7% -8%, higher than the usual meal content, leucine content (about 8%). In terms of the relative content of arginine content is low, so the peanut meal, cottonseed meal can be improved with the use of feeding effect blood meal protein content of at least 80 percent, the lowest protein digestibility of 95%.