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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 305 - 312 (8page)
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초록· 키워드
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This study was carried out to investigate the effects of dietary energy levels on growth performance, blood parameter, and intestinal morphology of Pekin ducks in low temperature. A total of 500, 21-d-old Pekin ducks (initial BW = 1,089 ± 5.21 g) were evenly assigned to five dietary treatments (2,950, 3,000, 3,050, 3,100, or 3,150 kcal AME/kg, calculated on an as-is basis) with four replicates (pens) for each treatment (25 ducks per pen). During the experiment, hens were provided with feed and water ad libitum. Overall, increasing dietary energy levels corresponded to an increase of final body weight and body weight gain (linear, p < 0.01). Feed intake decreased (linear, p < 0.01) and feed conversion ratio increased (linear, p < 0.01) with increasing levels of energy. There were no significant differences (p < 0.05) in the level of leukocytes between groups. However, heterophils decreased (quadratic, p < 0.05) and lymphocytes increased (linear, p < 0.01) as inclusion of dietary energy levels increased. The H/L ratio increased (linear, p < 0.01) with increasing dietary energy levels while serum corticosterone levels decreased at overall experimental periods. Triglycerides increased (linear and quadratic, p < 0.05) with increasing dietary energy levels. There were no significant changes in villus height or crypt depth of the jejunum at overall experimental. In conclusion, increasing concentrations of dietary energy levels up to 2,950–3,150 kcal/kg in diet. Additionally, 3,150 kcal/kg dietary energy had been revealed more beneficial and could be practiced as protective management for the Pekin ducks reared under low ambient temperature (8°C to 10°C).
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참고문헌 (42)
참고문헌 신청
Dietert RR / 1994 / Environment-immune interactions / Poult Sci 73:1062~1076
Hernawan E / 2012 / The levels of blood glucose, triglyceride, final body weight and abdominal fat percentage of broiler under sex-separated and straight run rearing system / Lucrari Stiintifice-Seria Zootehnie 57:28~33
Zhang ZW / 2011 / Effects of cold stress on nitric oxide in duodenum of chicks / Poult Sci 90:1555~1561
Dhanalakshmi S / 2007 / Protective effect of triphala on cold stress-induced behavioral and biochemical abnormalities in rats / J Pharm Soc Jpn 127:1863~1867
Sahin K / 2001 / Effects of dietary chromium picolinate supplementation on performance and plasma concentrations of insulin and corticosterone in laying hens under low ambient temperature / J Anim Physiol Anim Nutr 85:142~147
Hernawan E / 2012 / The levels of blood glucose, triglyceride, final body weight and abdominal fat percentage of broiler under sex-separated and straight run rearing system / Lucrari Stiintifice-Seria Zootehnie 57:28~33
Zhang ZW / 2011 / Effects of cold stress on nitric oxide in duodenum of chicks / Poult Sci 90:1555~1561
Dhanalakshmi S / 2007 / Protective effect of triphala on cold stress-induced behavioral and biochemical abnormalities in rats / J Pharm Soc Jpn 127:1863~1867
Sahin K / 2001 / Effects of dietary chromium picolinate supplementation on performance and plasma concentrations of insulin and corticosterone in laying hens under low ambient temperature / J Anim Physiol Anim Nutr 85:142~147
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