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- Title
Evaluation of the effects of NSP and exogenous enzymes on odor production in swine.
- Authors
Huang, C. C.; Leng, F. T.; Huang, R. Y.; Chen, C. Y.; Lin, C. S.; Wang, H. T.
- Abstract
Crude protein is often provided in excess in swine diets to improve growth performance. However, high-protein diets resulted in excess excretion of nitrogenous waste. This study investigates the effects of increased dietary NSP and enzyme supplementation on the reduction of fecal odor emission. Test treatments including: (1) Control diet (11.0 % NSP); (2) High NSP: (NSP adjusted to 16.5 % by soybean hull); (3) NSPase: Diet 2 with NSPase; (3) NSPase + Pro: Diet 2 with NSPase and protease. The average daily grain and feed intake among all treatments showed no difference. Compared to the control diet, the concentrations of NH3-N, P-cresol, indole, and skatole in feces from pigs fed high NSP diet were decreased significantly. Fecal NH3-N and P-cresol concentrations in NSPase treatment group were significantly higher than the high NSP feeding group. However, all fecal odor compounds concentrations in NSPase + Pro feeding group were significantly higher than the high NSP feeding group. In conclusion, increasing the dietary NSP resulted in the reduction of fecal odor emission without sacrificing the growth performance. Enzyme supplementation in a high NSP diet might potentially increase the fecal odor emission.
- Subjects
SWINE growth; SWINE nutrition; DIETARY supplements; ODOR control in animal housing; CRESOL
- Publication
Journal of the Chinese Society of Animal Science, 2021, Vol 50, p203
- ISSN
0253-9187
- Publication type
Article