In order to determine the availability of fermented protein feedstuffs (FPFS)—such as cottonseed, blood,
and feather meals—with Aspergillus oryzae, 2 phases of feeding experiments were adopted for 7 weeks. Sixty 58-dayold crossbred pigs were assigned to 6 groups, 10 pigs per group. Group 1 was the control; groups 2, 3, and 4 were
supplemented with 6%-7%, 12%-14%, and 18%-21% FPFS, respectively, by replacing the same percentage of soybean
meal (SBM); group 5 was supplemented with 12%-14% unfermented protein feedstuffs (UFPFS) by replacing the same
percentage of SBM; group 6 was on the same base as group 3 with digestive energy (DE) balanced as in group 1. The
results showed: (1) The soluble amino acids in FPFS were increased by 211% (58.06 vs. 18.68 g/kg), compared with
UFPFS; (2) the average daily gain (ADG) increased (P < 0.05) in group 2, compared with the other groups; ADG in group
3 was higher than that in group 5 (P < 0.05); and (3) nutrient digestibility in the groups supplemented with FPFS was
higher than in the group supplemented with UFPFS (P < 0.05). The results suggest that a 6%-7% FPFS supplementation
to replace SBM in pig diets would be ideal and economic.
In order to determine the availability of fermented protein feedstuffs (FPFS)—such as cottonseed, blood,and feather meals—with Aspergillus oryzae, 2 phases of feeding experiments were adopted for 7 weeks. Sixty 58-dayold crossbred pigs were assigned to 6 groups, 10 pigs per group. Group 1 was the control; groups 2, 3, and 4 weresupplemented with 6%-7%, 12%-14%, and 18%-21% FPFS, respectively, by replacing the same percentage of soybeanmeal (SBM); group 5 was supplemented with 12%-14% unfermented protein feedstuffs (UFPFS) by replacing the samepercentage of SBM; group 6 was on the same base as group 3 with digestive energy (DE) balanced as in group 1. Theresults showed: (1) The soluble amino acids in FPFS were increased by 211% (58.06 vs. 18.68 g/kg), compared withUFPFS; (2) the average daily gain (ADG) increased (P < 0.05) in group 2, compared with the other groups; ADG in group3 was higher than that in group 5 (P < 0.05); and (3) nutrient digestibility in the groups supplemented with FPFS washigher than in the group supplemented with UFPFS (P < 0.05). The results suggest that a 6%-7% FPFS supplementationto replace SBM in pig diets would be ideal and economic.
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