ISSN : 1225-2964(Print)
ISSN : 2287-3317(Online)
ISSN : 2287-3317(Online)
Annals of Animal Resource Sciences Vol.28 No.2 pp.56-63
DOI : https://doi.org/10.12718/AARS.2017.28.2.56
DOI : https://doi.org/10.12718/AARS.2017.28.2.56
Effects of Dietary Energy and Levels of Betaine on Nutrient Digestibility and Physiological Responses in Growing Pigs with Heat Stress
Abstract
This study was conducted to determine the effects of supplementary levels of dietary betaine and energy on nutrient digestibility and physiological responses in growing pigs exposed to heat stress. A total of 12 barrows (L×Y×D; initial BW, 67.1±0.98 kg) were allocated into individual metabolic crates. Experimental design was a 4×4 Latin square with dietary energy and betaine levels (3,300 and 3,400 kcal/kg; 0 and 0.5%, respectively) and the experimental period (n=4). Feeding trial was performed during summer season (July and August). Digestibility of crude fat was higher (p<0.01) in the ME 3,400 kcal/kg than the ME 3,300 kcal/kg, but did not differ by betaine (p>0.05). Blood corpuscles and biochemical components were not influenced by dietary energy and betaine levels (p>0.05). Serum IgG was greater (p<0.05) in the ME 3,400 kcal/kg than the ME 3,300 kcal/kg, but cortisol was not differ among the treatment groups (p>0.05). In conclusion, our results showed positive effects by energy levels rather than betaine. Thus, further study need investigation of effects of high energy level in the pigs exposed to heat stress.