This test was used an in vitro digestion test to screen the optimal combination of three kinds of cellulase, and aimed to study the appropriate addition of combining cellulase in diets for growing pigs of different breeds. The test used acid detergent fiber (ADF) as an evaluation index and prepared 3.8% ADF and 5.8% ADF of dietary fiber with sweet potato vine. Five Yantai Black growing pigs and five Duroc?Luyan White hybrid pigs with an average body weight of (25?1) kg were used, and were installed T fistulas in the terminal ileum. A 5 ? 5 Latin square design was used in digestibility test, and the adding levels of combining cellulase were 0 (control group), 0.05%, 0.10%, 0.15% and 0.20%, respectively. The results showed as follows: the combining cellulase in the diets with 5.8% ADF significantly promoted nutrient digestibility and nitrogen balance in growing pigs of different breeds (P<0.05), but no significant difference was found in the diets with 3.8% ADF (P>0.05). Under the condition of the diets with 5.8% ADF and with the same addition of combining cellulose, for the essential amino acid, including Met, Val and Phe, the ileal apparent digestibility of Yantai Black pigs was significantly higher than that of Duroc?Luyan White hybrid pigs (P<0.01); for the non-essential amino acids, the ileal apparent digestibility of Ser and Gly was not significant (P>0.05), and that of the other amino acids was significant difference (P<0.01). The appropriate addition of combining cellulase in diets with 5.8% ADF was 0.10% for Yantai Black growing pigs and 0.15% for Duroc?Luyan White hybrid pigs.
GENG Mei
,
JIANG Jianyang
,
HAN Xianjie
,
SONG Chunyang
. Appropriate Addition of Combining Cellulase in Diets for Growing Pigs of Different Breeds[J]. Chinese Journal of Animal Nutrition, 2013
, 25(7)
: 1541
-1550
.
DOI: 10.3969/j.issn.1006-267x.2013.07.019
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