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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 659 - 667 (9page)
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초록· 키워드
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This study was conducted to evaluate the effects of different levels of crude protein (CP) and protease on nitrogen (N) utilization, nutrient digestibility, and growth performance in growing pigs. A total of six crossbred ([Landrace × Yorkshire] × Duroc) barrows were individually accepted in 1.2 m × 0.7 m × 0.96 m stainless steel metabolism cages. The pigs (average initial body weight of 27.91 ± 1.84 kg) randomly assigned to six diets with six weeks (6 × 6 Latin square design). The experiment was carried out in an environment with a temperature of 23 ± 1.5℃, a relative humidity of 83 ± 2.3% and a wind speed of 0.25 ± 0.03 m/s. The dietary treatments were arranged in a 2 × 3 factorial design with two levels of CP (15.3% or 17.1%) and three levels of protease (0 ppm, 150 ppm, or 300 ppm). The average daily gain and gain to feed ratio (G:F) tended to increase (p = 0.074) with increasing amounts of protease. The low CP level diet reduced (p < 0.050) urinary and fecal N concentrations, the total N excretion in feces, and increased (p < 0.050) N retention. Different protease levels in the diet did not affect (p > 0.05) at N intake, but supplementation of the diets with 300 ppm protease decreased (p < 0.050) the N concentration in urine and feces and tended to increase (p = 0.061) the percentage of N retention retained of the total N intake. The dietary CP level did not affect (p > 0.050) the apparent total tract digestibility (ATTD) of dry matter, digestible energy (DE), and metabolic energy (ME), but diet supplementation with 300 ppm protease showed higher (p < 0.050) ATTD of DE and ME than in the protease-free diet. Therefore, a low protein diet with protease could improve the utilization of nitrogen, thereby reducing the negative effect of N excretion into the environment while maintaining or increasing growth performance compared to a high protein diet.
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참고문헌 (35)
참고문헌 신청
Vanessa T.S. Rist / 2014 / Effect of dietary protein supply originating from soybean meal or casein on the intestinal microbiota of piglets / Anaerobe 25:72~79
C. Lee / 2012 / Effects of metabolizable protein supply and amino acid supplementation on nitrogen utilization, milk production, and ammonia emissions from manure in dairy cows / Journal of Dairy Science 95(9):5253~5268
C. W. Holmes / 1980 / Some aspects of the energy and nitrogen metabolism of boars, gilts and barrows given diets containing different concentrations of protein / Animal Science 31(3):279~289
B J Kerr / 1995 / Effect of feeding reduced protein, amino acid-supplemented diets on nitrogen and energy balance in grower pigs. / Journal of Animal Science 73(10):3000
B. J. Kerr / 1995 / Effect on performance and carcass characteristics of nursery to finisher pigs fed reduced crude protein, amino acid-supplemented diets / Journal of Animal Science 73(2):433~440
C. Lee / 2012 / Effects of metabolizable protein supply and amino acid supplementation on nitrogen utilization, milk production, and ammonia emissions from manure in dairy cows / Journal of Dairy Science 95(9):5253~5268
C. W. Holmes / 1980 / Some aspects of the energy and nitrogen metabolism of boars, gilts and barrows given diets containing different concentrations of protein / Animal Science 31(3):279~289
B J Kerr / 1995 / Effect of feeding reduced protein, amino acid-supplemented diets on nitrogen and energy balance in grower pigs. / Journal of Animal Science 73(10):3000
B. J. Kerr / 1995 / Effect on performance and carcass characteristics of nursery to finisher pigs fed reduced crude protein, amino acid-supplemented diets / Journal of Animal Science 73(2):433~440
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