Effects of Level of CP and TDN in the Concentrate Supplement on Growth Performances and Carcass Characteristics in Hanwoo Steers during Final Fattening Period

Jeong, Joon; Seong, Nak-Il; Hwang, Il-Ki; Lee, Sun-Bok; Yu, Myung-Sang; Nam, In-Sik; Lee, Myong-Il

doi:10.5187/jast.2010.52.4.305

Cited by 13 publications

(21 citation statements)

References 4 publications

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“…These results probably occurred because pTMR and cTMR had higher TDN than nTMR. Similarly, Jeong et al (2010) found that feed with high TDN (75% TDN) increased the rib eye area in Hanwoo steers. On the other hand, nTMR provided a significantly higher omasum weight compared with pTMR and cTMR, which caused from the high amount of CF in the intake.…”

Section: Discussionmentioning

confidence: 75%

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

Hattakum¹,

Kanjanapruthipong²,

Nakthong³

et al. 2019

SA J. An. Sci.

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This experiment was conducted to determine the effects of pineapple stem by-product silage as a feed source in total replacement of Napier or corn silages on growth performance, feed intake and feed efficiency, ruminal fermentation, carcass characteristics and meat quality of Holstein crossbred steers. Forty-eight steers with an average age of 18 months (448.6 ± 51.5 kg) were randomly allocated to three groups (one diet per group) in a completely randomized design. Steers were fed total mixed ration (TMR) containing a roughage-to-concentrate ratio of 20 : 80. The TMR diets contained Napier grass silage (nTMR), whole corn silage (cTMR) or pineapple stem silage (pTMR) and were offered ad libitum for six months. The results revealed that pTMR and cTMR diets resulted in a significantly higher weight gain than nTMR. These results were observed because pTMR and cTMR diets provided more N-free extract (NFE) total digestible nutrients (TDN) than nTMR diet, and the feed conversion efficiencies for pTMR and cTMR diets were higher than those of nTMR. Ruminal pH, ammonia-nitrogen and volatile fatty acid concentrations were not significantly different among dietary treatments. The carcass characteristics of steers fed cTMR and pTMR diets included significantly larger rib eye areas than steers fed nTMR, whereas meat quality was not affected by treatment. Additionally, the current research showed that pTMR diet provided the lowest feed cost per gain. The results suggest that pineapple stem by-product could be regarded as a potential feed source for reducing costs in cattle feedlots.

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Section: Discussionmentioning

confidence: 75%

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

Hattakum¹,

Kanjanapruthipong²,

Nakthong³

et al. 2019

SA J. An. Sci.

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“…ble-muscled crossbred young bulls. Conversely, Jeong et al [15] studied the responses to low-(12%) and high-CP (14%) diets with a similar total digestible nutrient (TDN) content (75%) in the finishing Hanwoo steers, and found that the high-CP diet increased final BW and feed conversion ratio while slightly affecting DMI. 6) 3.0 3.0 3.0 --Texture score 7) 1.…”

Section: Discussion Productivitymentioning

confidence: 99%

“…Likewise, Dal Maso et al [ 14 ] reported that growth performance was negligibly affected when dietary CP concentrations decreased from 14.7% to 11.0% in double-muscled crossbred young bulls. Conversely, Jeong et al [ 15 ] studied the responses to low- (12%) and high-CP (14%) diets with a similar total digestible nutrient (TDN) content (75%) in the finishing Hanwoo steers, and found that the high-CP diet increased final BW and feed conversion ratio while slightly affecting DMI.…”

Section: Discussionmentioning

confidence: 99%

“…Vasconcelos et al [6] also found that steers fed a diet with 13.0% CP had greater marbling scores than those fed with lower CP diets (11.5% or 10.0%); however, backfat thickness, LM area, and yield grade differed negligibly by CP concentration. In a study with finishing Hanwoo steers, Jeong et al [15] compared the effects of diets differing in CP concentration (12% vs 14%) and energy density (73% vs 75% TDN) and found that feeding with higher CP and TDN concentrations increased LM area, marbling score, meat quality grade, and improved production economics. In the present study, marbling scores tended to be numerically greater in the HPHU diet, which highlights the importance of UIP concentration, regardless of CP concentration, in marbling development.…”

Section: Carcass Characteristicsmentioning

confidence: 99%

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Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers

Lee

Ahmadi

Lee

et al. 2020

Asian-Australas J Anim Sci

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Objective: This study was designed to determine how feeding diets differing in crude protein (CP) and undegraded intake protein (UIP) levels affected productivity, blood metabolites, carcass characteristics, and the production economics of Hanwoo steers.Methods: Thirty-six Hanwoo steers (age = 8.2±0.5 mo; body weight = 254±16.1 kg) were assigned at random to one of three treatments (4 steers/pen; 3 pens/treatment): i) a low-CP diet (LP; control) containing 12.1% CP with 35.1% UIP, 12.0% CP with 36.8% UIP, and 12.9% CP with 48.8% UIP, in the growing, fattening, and finishing periods, respectively; ii) a high-CP, low-UIP diet (HPLU) containing 15.0% CP with 33.7% UIP, 14.0% CP with 35.7% UIP, and 13.1% CP with 46.7% UIP, respectively; and iii) a high-CP, high-UIP diet (HPHU) containing 15.0% CP with 45.8% UIP, 14.0% CP with 44.6% UIP, and 13.0% CP with 51.1% UIP, respectively.Results: The treatments did not affect feed intake and growth performance, except for average daily gain during the fattening period that tended to be the lowest (p = 0.08) in the HPLUfed steers. The feed CP conversion ratio over the entire feeding period was higher with high-CP diets. The treatments did not affect most blood metabolites; however, blood cholesterol and low-density lipoprotein concentrations during the fattening and finishing periods were the lowest in steers fed a HPLU diet. The treatments had negligible effects on cold carcass weight, yield traits including longissimus muscle area, backfat thickness, yield index, and yield grade, plus quality traits including meat color, fat color, texture, and maturity. However, marbling score and frequency of carcass quality grade 1++ were greater in HPHU-fed steers.Conclusion: Feeding diets with higher CP and UIP levels did not affect growth performance but tended to improve the carcass quality of Hanwoo steers, resulting in greater economic return.

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“…The energy level of feed is known to be a major factor affecting the growth performance, carcass characteristics, and fat deposition in beef cattle (Chung et al, 2015), with total digestible nutrients (TDN) being the most widely used energy estimation unit. In particular, TDN levels of late fattening concentrates affect average daily gain (ADG) and intramuscular fat deposition of fattening cattle (Jeong et al, 2010). Therefore, it is an important factor for producing high quality meat from Hanwoo steers (Lee, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Total Digestible Nutrients Level of Concentrates on Growth Performance, Carcass Characteristics, and Meat Composition of Korean Hanwoo Steers

Ahn

Son

Kim

et al. 2019

Food Sci Anim Resour

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This study was conducted to investigate the effect of the total digestible nutrients (TDN) level of commercial concentrates on growth performance, carcass characteristics, and meat composition of late fattening Hanwoo steers. A total of 28 steers were randomly assigned to one of four dietary groups; T1 (73.30% TDN), T2 (74.50% TDN), T3 (76.40% TDN), and T4 (77.10% TDN). Average daily gain (ADG) was slightly but not significantly higher in the T2 than in the other treatments. Dry matter intake (DMI) and feed conversion ratio (FCR) were higher in the T2 than in the other treatments; however, the differences were not statistically significant. Carcass back fat thickness was thicker in the T4 and marbling score was higher in the T2 than in the other treatments; however, the differences were not statistically significant. The TDN level of concentrates had no effect on the physicochemical characteristics and fatty acid composition of the longissimus muscle. The finding of this study indicate that less than 74% or greater than 75% TDN in the commercial concentrate did not contribute to improve ADG, FCR, marbling score; therefore, in the present study, the recommendable TDN level in the commercial concentrate for late fattening period was 74% to 75% in terms of growth performance and marbling score of Hanwoo steer.

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Effects of Level of CP and TDN in the Concentrate Supplement on Growth Performances and Carcass Characteristics in Hanwoo Steers during Final Fattening Period

Cited by 13 publications

References 4 publications

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers

Effect of Total Digestible Nutrients Level of Concentrates on Growth Performance, Carcass Characteristics, and Meat Composition of Korean Hanwoo Steers

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