The Feeding and Management of Intensively Reared Bulls: Conventional Compared With Organic

Lowman, B. G.; Lewis, M.

doi:10.1016/b978-0-7506-1397-2.50015-0

Cited by 4 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The last group of animals was slaughtered on 17 June and despite some warm days, the quality of GS remained acceptable. In general, if the finishing period continues over the summer, maintaining GS quality may be difficult, as Lowman and Lewis (1991) suggested. During P2, the DM consumption of C was on average 1.8 kg higher than that of F on diet A.…”

Section: Feeds Feed Intake and Diet Digestibilitymentioning

confidence: 95%

“…Plaizier et al, 2008). This can even generate tympany (Lowman and Lewis, 1991), and increase the incidence of laminitis and liver abscesses (Nocek, 1997). The feed industry utilizes a wide variety of feed ingredients to produce compounds for cattle feeding.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 98%

“…However, the NDF content was similar in C and F, which may be due to the higher amount of soluble carbohydrates in C (molassed sugar beet pulp and wheat molasses together 140 g/kg) than in F. McGee et al (2006) reported concentrate intake to be unaffected by concentrate energy source (barley-, maize-and pulp-based or barley-pulp mixture with similar concentrations of ME and CP, 12.8 MJ/kg DM and 137 g/kg DM, respectively). Lowman and Lewis (1991) suggested that for fast growing, intensively (cereal-based systems) fed bulls, the concentrate should contain a minimal amount of rapidly fermented non-structural carbohydrates which probably mean optimal conditions for rumen fermentation.…”

Section: Feeds Feed Intake and Diet Digestibilitymentioning

confidence: 99%

“…A high amount or ad libitum concentrate is usually given together with restricted amounts of grass silage (Caplis et al, 2005;Keane et al, 2006;McGee et al, 2006;Walsh et al, 2008a,b) or with roughage of low digestibility, e.g. straw (Lowman and Lewis, 1991;Micol et al, 2007;Mialon et al, 2008). Diets combining both concentrate and high-digestibility grass silage ad libitum are not common.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Effects of concentrate type and level on the performance and health of finishing Hereford bulls given a grass silage-based diet and reared in cold conditions

et al. 2010

View full text Add to dashboard Cite

Section: Feeds Feed Intake and Diet Digestibilitymentioning

confidence: 95%

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 98%

Section: Feeds Feed Intake and Diet Digestibilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Effects of concentrate type and level on the performance and health of finishing Hereford bulls given a grass silage-based diet and reared in cold conditions

et al. 2010

View full text Add to dashboard Cite

“…According to Lowman and Lewis (1991), the performance of bulls is not very sensitive to a range of protein concentrations between 130 and 180 g CP kg -1 DM. In the present study, the diet CP concentrations were 163, 177, 155 and 167 g CP kg -1 DM on diets EM, EH, LM and LH, respectively.…”

Section: Effects Of Concentrate Protein Concentration On Animal Perfomentioning

confidence: 99%

Effects of grass-red clover silage digestibility and concentrate protein concentration on performance, carcass value, eating quality and economy of finishing Hereford bulls reared in cold conditions

Manninen

Honkavaara

Jauhiainen

2008

AFSci

View full text Add to dashboard Cite

The aim of the present experiment was to study the effects of (1) digestibility of grass-red clover silage (GCS) and (2) concentrate protein concentration on the performance, eating quality and economy of Hereford bulls during a six months pre-slaughter period, and reared in cold indoor facilities. Thirty-one bulls with an initial live weight (LW) of 289 kg were selected for a 2 × 2 factorial design experiment consisting of two primary growth GCSs harvested at different maturities (in vitro digestible organic matter (OM) in dry matter (DM), D value: Early-cut, E, 750 g kg -1 DM; Late-cut, L, 699 g kg -1 DM) and two concentrate crude protein concentrations (Medium, M, 170 g kg -1 DM; High, H, 210 g kg -1 DM). The concentrate comprised milled barley and pelleted commercial protein compound and was offered daily on average 3.2 kg DM, including 0.45 and 1.13 kg of rapeseed cake in M and H, respectively. Grass-red clover silage was offered ad libitum. The target cold carcass weight was 330 kg.The proportion of concentrate of the total daily DM intake averaged 0.337 during the entire experiment. Treatments had no effect on the daily intake of GCS, total intake of DM, DM intake kg -1 LW 0.75 and metabolizable energy averaging 6.0 and 9.4 kg DM, 97.4 g and 109.4 MJ, respectively. The digestibility of dietary OM and neutral detergent fibre was lower (p < 0.05, 0.733 vs. 0.769 and 0.625 vs. 0.665) on diet L than on diet E. The animals on diet E tended to consume daily on average 1.29 kg less (p < 0.10) DM kg -1 net weight gain than those on diet L. The time to achieve the target carcass weight was on average 18 days longer (p < 0.01) on diet L than on diet E. During the entire experiment the LW gain averaged 1795 and 1609 g d -1 (p < 0.01) on diets E and L, respectively. The concentrate protein concentration did not affect animal performance. Treatments had no significant effect on the kill-out proportion, EUROP carcass conformation and carcass fat classification which averaged 537 g kg -1 , 6.5 and 3.6, respectively. The eating quality of the tested loins was good. Treatments had only a minor effect on the yield of valuable cuts. It is concluded that the digestibility of silage is important since the early-cut silage improved the growth rate and shortened the finishing period of bulls significantly compared with those fed late-cut silage. The lower yield and, thus, higher unit cost of early-cut silage may, however, invalidate its superiority compared with the late-cut silage. There was no benefit from using concentrate of high protein concentration.

show abstract

Effect of yeast culture on rumen fermentation, microbial protein flow from the rumen and live-weight gain in bulls given high cereal diets

Hassan¹,

Newbold²,

Edwards

et al. 1996

Anim. Sci.

View full text Add to dashboard Cite

El Hassan, S. M., Newbold, C. J., Edwards, I. E., Topps, J. H., Wallace, R. J. (1996). Effect of yeast culture on rumen fermentation, microbial protein flow from the rumen and live-weight gain in bulls given high cereal diets. Animal Science, 62 (1), 43-48.Four groups each of eight Limousin X Friesian bulls, average weight 344 kg, were offered individually ad libitum diets comprising: 920 g rolled barley, 50 g cane molasses, 15 g urea and 15 g minerals/vitamins mix per kg or 867 . 5 g rolled barley, 50 g cane molasses, 7 . 5 g urea, 60 g soya-bean meal and 15 g minerals/vitamins mix per kg, plus or minus yeast culture (YC, 1 . 5 kg/t) (all weights fresh weights), until slaughter (460 kg). Rumen samples were obtained by stomach tube. YC decreased rumen ammonia concentrations (116 . 7, 56 . 0, 74 . 3, 45 . 7 (s.e.d. 19 . 40) mg/l for barley/urea, barley/urea/YC, barley/soya-bean meal and barley/soya-bean meal/YC, respectively). This was associated with increases (P <0 . 05) in both the total number of bacteria (2 . 3, 4 . 2, 3 . 5, 6 . 8 (s.e.d. 1 . 06) X 10(9) per ml, respectively) and the protein content of rumen fluid (7 . 7, 9 . 6, 8 . 7, 9 . 0 (s.e.d. 0 . 59) g/l, respectively). However, the flow of microbial protein from the rumen as estimated from the appearance of purine derivatives in the urine was unaffected (131, 130, 129, 147 (s.e.d. 12 . 6) g N per day, respectively). Thus although the animals responded to the undegradable rumen protein supplied by the soya-bean meal there was no significant response in live-weight gain with YC (1 . 28, 1 . 31, 1 . 42, 1 . 48 (s.e.d. 0 . 081) kg/day, respectively).Peer reviewe

show abstract

The Feeding and Management of Intensively Reared Bulls: Conventional Compared With Organic

Cited by 4 publications

References 10 publications

Effects of concentrate type and level on the performance and health of finishing Hereford bulls given a grass silage-based diet and reared in cold conditions

Effects of concentrate type and level on the performance and health of finishing Hereford bulls given a grass silage-based diet and reared in cold conditions

Effects of grass-red clover silage digestibility and concentrate protein concentration on performance, carcass value, eating quality and economy of finishing Hereford bulls reared in cold conditions

Effect of yeast culture on rumen fermentation, microbial protein flow from the rumen and live-weight gain in bulls given high cereal diets

Contact Info

Product

Resources

About