Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Effects of Pine Silage Feeding on Ruminal Fermentation Characteristics, and Blood Concentrations of Stress-Related Hormones in HANWOO Steers

잣나무 생지엽(生枝葉) 사일리지 급여가 거세한우의 반추위 발효성상 및 스트레스 관련 Hormone의 혈 중 농도에 미치는 영향

  • Published : 2005.04.30
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Abstract

This study was conducted to utilize the wastes produced from thinning the forest as a roughage source for ruminants. Four ruminally cannulated Korean steers were used to investigate the ruminal fermentation characteristics and blood concentrations of stress-related hormones. Treatments were composed of the rice straw only (Control) and the 30% pine silage plus 70% rice straw(Pine silage) as roughages. The experiment was conducted with four replicates by a double tum over design. For sampling of blood under high temperature steers were accommodated in respiratory chamber. Concentrations of ruminal pH, volatile fatty acids and ammonia were not affected by substitution of pine silage. Mean concentration of blood thyroxine was significantly(P < 0.01) lower in the pine silage than the control. However, blood cortisol concentration was not affected by substitution of pine silage, even though it was significantly(P < 0.05) decreased after exposure for 6 hrs in high temperature. It was concluded that the pine silage using the wastes produced from thinning the forest could be use as a substitute roughage for reduction of heat stress in ruminant.

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References

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