Effect of increased dietary crude protein levels on production performance, nitrogen utilisation, blood metabolites and ruminal fermentation of Holstein bulls
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Objective: This study investigated the effect of dietary crude protein (CP) supplementation on nutrient intake, nitrogen (N) utilisation, blood metabolites, ruminal fermentation and growth performance of young Holstein bulls. Methods: Twenty-one young bulls weighing 277±11.2 kg were equally divided into three groups and were offered diets formulated with low CP (LCP; 10.21% CP and 4.22% rumen degradable protein [RDP]), medium CP (MCP; 12.35% CP and 5.17% RDP) and high CP (HCP; 14.24% CP and 6.03% RDP). Yellow corn silage was used as a unique forage source and was mixed with concentrate. This mixed feed was given ad libitum to the young bulls included in the study. Results: Results showed that CP intake, blood urea nitrogen, N intake, total N excretion and N balance increased linearly with an increase in dietary CP level (p<0.05). However, no significant difference was observed in nutrient digestibility among the bulls receiving the different diets. Ruminal pH (p<0.05) and ammonia nitrogen (NH3-N) concentration (p<0.01) were significantly higher in the bulls receiving the MCP and HCP diets than in those receiving the LCP diet. The bulls receiving the HCP diet showed significantly higher ruminal bacterial protein level, propionate, acetate and total volatile fatty acid (TVFA) concentrations than bulls receiving the LCP diet (p<0.05). Moreover, dietary CP level exerted a significant positive effect on the final body weight, average daily gain and gain-to-feed ratio of the bulls (p<0.05). Conclusion: High dietary CP level is optimal for achieving maximum growth and high profitability without exerting a negative effect on the physiology of growing Holstein bulls.
Abstract
Objective: This study investigated the effect of dietary crude protein (CP) supplementation on nutrient intake, nitrogen (N) utilisation, blood metabolites, ruminal fermentation and growth performance of young Holstein bulls. Methods: Twenty-one young bulls weighing 277±11.2 kg were equally divided into three groups and were offered diets formulated with low CP (LCP; 10.21% CP and 4.22% rumen degradable protein [RDP]), medium CP (MCP; 12.35% CP and 5.17% RDP) and high CP (HCP; 14.24% CP and 6.03% RDP). Yellow corn silage was used as a unique forage source and was mixed with concentrate. This mixed feed was given ad libitum to the young bulls included in the study. Results: Results showed that CP intake, blood urea nitrogen, N intake, total N excretion and N balance increased linearly with an increase in dietary CP level (p<0.05). However, no significant difference was observed in nutrient digestibility among the bulls receiving the different diets. Ruminal pH (p<0.05) and ammonia nitrogen (NH3-N) concentration (p<0.01) were significantly higher in the bulls receiving the MCP and HCP diets than in those receiving the LCP diet. The bulls receiving the HCP diet showed significantly higher ruminal bacterial protein level, propionate, acetate and total volatile fatty acid (TVFA) concentrations than bulls receiving the LCP diet (p<0.05). Moreover, dietary CP level exerted a significant positive effect on the final body weight, average daily gain and gain-to-feed ratio of the bulls (p<0.05). Conclusion: High dietary CP level is optimal for achieving maximum growth and high profitability without exerting a negative effect on the physiology of growing Holstein bulls.
참고문헌 (30)
- Sri Suharti, "Rumen Microbial Population in the In vitro Fermentation of Different Ratios of Forage and Concentrate in the Presence of Whole Lerak (Sapindus rarak) Fruit Extract", Animal Bioscience, 24(8), pp.1086~1091 (2011), 아세아·태평양축산학회
- Detmann E, "In vitro degradation of neutral detergent fiber of low-quality tropical forage according to supplementation with true protein and (or) non-protein nitrogen", R Bras Zootec, 40, pp.1272~1279 (2011)[DOI]
- Carlson DB, "Metabolic effects of abomasal L-carnitine infusion and feed restriction in lactating Holstein cows", J Dairy Sci, 89, pp.4819~4834 (2006)[DOI]
- O'Colmenero JJ, "Effect of dietary crude protein concentration on milk production and nitrogen utilization in lactating dairy cows", J Dairy Sci, 89, pp.1704~1712 (2006)[DOI]
- Nocek JE, "Bovine acidosis: implications on laminitis", J Dairy Sci, 80, pp.1005~1028 (1997)[DOI]
- Kang S, "Effect of protein level and urea in concentrate mixture on feed intake and rumen fermentation in swamp buffaloes fed rice strawbased diet", Trop Anim Health Prod, 47, pp.671~679 (2015)[DOI]
- T. Norrapoke, "Effects of Protein Level and Mangosteen Peel Pellets (Mago-pel) in Concentrate Diets on Rumen Fermentation and Milk Production in Lactating Dairy Crossbreds", Animal Bioscience, 25(7), pp.971~979 (2012), 아세아·태평양축산학회[DOI]
- Javaid A, "Ruminal dynamics of ad libitum feeding in buffalo bulls receiving different level of rumen degradable protein", Livest Sci, 135, pp.98~102 (2011)[DOI]
- Abadi EIK, "Effect of dietary crude protein level on UT-B expression and nitrogen efficiency in growing Baluchi male lambs fed low or high concentrate diets", Iran J Appl Anim Sci, 5, pp.323~332 (2015)
- Leonardi C, "Effect of two levels of crude protein and methionine supplementation on performance of dairy cows", J Dairy Sci, 86, pp.4033~4042 (2003)[DOI]
- Danes MAC, "Effect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass", J Dairy Sci, 96, pp.407~419 (2013)[DOI]
- Hatfield PG, "Effects of level of protein and type of molasses on digesta kinetics and blood metabolites in sheep", Small Rumin Res, 28, pp.161~170 (1998)[DOI]
- Gleghorn JF, "Effects of crude protein concentration and degradability on performance, carcass characteristics, and serum urea nitrogen concentrations in finishing beef steers", J Anim Sci, 82, pp.2705~2717 (2004)[DOI]
- NRC, "Nutrient requirements of beef cattle. 7th edn." (2001), National Academy Press
- Galyean ML, "Protein levels in beef cattle finishing diets: Industry application, university research, and systems results", J Anim Sci, 74, pp.2860~2870 (1996)[DOI]
- Muhammad AUR, "Dietary forage concentration and particle size affect sorting, feeding behaviour, intake and growth of Chinese holstein male calves", J Anim Physiol Anim Nutr, 100, pp.217~223 (2016)[DOI]
- Broderick GA, "Automated simultaneous determination of ammonia and total amino acids in ruminal fluid and in vitro media", J Dairy Sci, 63, pp.64~75 (1980)[DOI]
- 김언태, "The Effect of Plant Extracts on In-vitro Ruminal Fermentation, Methanogenesis and Methane-related Microbes in the Rumen", Animal Bioscience, 26(4), pp.517~522 (2013), 아세아·태평양축산학회[DOI]
- Berger LL, "Effect of sodium hydroxide treatment on rate of passage and rate of ruminal fiber digestion", J Anim Sci, 50, pp.745~749 (1980)[DOI]
- AOAC, "Official methods of analysis of the AOAC International. 17th edn." (2000)
- Van Soest PJ, "Methods for dietary fiber, neutral detergent fiber, and non-starch polysaccharides in relation to animal nutrition", J Dairy Sci, 74, pp.3583~3597 (1991)[DOI]
- Bahrami-Yekdangi H, "Effects of decreasing metabolizable protein and rumen-undegradable protein on milk production and composition and blood metabolites of Holstein dairy cows in early lactation", J Dairy Sci, 97, pp.3707~3714 (2014)[DOI]
- Bahrami-Yekdangi M, "Reducing crude protein and rumen degradable protein with a constant concentration of rumen undegradable protein in the diet of dairy cows: Production performance, nutrient digestibility, nitrogen efficiency, and blood metabolites", J Anim Sci, 94, pp.718~725 (2016)
- Dung DV, "Practice on improving fattening local cattle production in Vietnam by increasing crude protein level in concentrate and concentrate level", Trop Anim Health Prod, 45, pp.1619~1626 (2013)[DOI]
- Chanthakhoun V, "Level of crude protein in concentrate supplements influenced rumen characteristics, microbial protein synthesis and digestibility in swamp buffaloes (Bubalus bubalis)", Livest Sci, 144, pp.197~204 (2012)[DOI]
- Reid M, "The effect of dietary crude protein and phosphorus on grass-fed dairy cow production, nutrient status, and milk heat stability", J Dairy Sci, 98, pp.517~531 (2015)[DOI]
- Davidson S, "Effects of amounts and degradability of dietary protein on lactation, nitrogen utilization, and excretion in early lactation Holstein cows", J Dairy Sci, 86, pp.1681~1689 (2003)[DOI]
- Pilachai R, "The effects of high levels of rumen degradable protein on rumen pH and histamine concentrations in dairy cows", J Anim Physiol Anim Nutr, 96, pp.206~213 (2012)[DOI]
- Liu Z, "Effects of total pellet feed diet with different straws on the rumen and blood metabolism parameters for sheep", China Feed, 11, pp.12~14 (2005)
- Sami AS, "Performance, carcass characteristics and chemical composition of beef affected by lupine seed, rapeseed meal and soybean meal", J Anim Physiol Anim Nutr, 94, pp.465~473 (2010)
