Effects of Roughage Levels on Growth, Beef Quality, Ruminal Contents and Serum Constituents in Japanese Black Steers during the Growing Period

Oka, Akio; Dohgo, Taiji; Ohtagaki, Susumu; Juen, Masakatsu

doi:10.2508/chikusan.70.451

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…Such an increase in rumen/reticulum size would probably be attributable to the intake of a great deal of herbage by the GMP and GLP steers in the growing period, with a subsequent increase in intestinal activity. Fattening indexes (Oka et al . 1999) did not differ among the treatments.…”

Section: Resultsmentioning

confidence: 99%

The effects of grazing and supplemental protein concentrations during the grazing period on subsequent finishing performance and carcass quality in Japanese Black cattle steers

Sugimoto

Kuzuoka

Yayota

et al. 2004

Animal Science Journal

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The effects of grazing and supplemental protein concentrations, provided during the grazing period, on subsequent finishing performance and carcass quality were investigated. This experiment was carried out using 15 Japanese Black cattle (Wagyu) steers. The steers were fed as follows: (i) grazing supplemented with moderate protein concentrate (GMP) (18% crude protein (CP); dry matter (DM) basis) before finishing, followed by feeding in a barn until slaughter; (ii) grazing supplemented with low protein concentrate (GLP) (14% CP; DM basis) before finishing, followed by feeding in the barn until slaughter; and (iii) no grazing before finishing (NG). From the end of the grazing season to the end of the growing period, the GMP and GLP steers were managed in the same way as the NG steers. All of the animals were fed the same diet in the finishing period (9 months to 28 months). None of the three treatments affected the average daily gains. For all treatments, chilled carcass weights were more than 450 kg and did not differ significantly among the groups. The longissimus muscle areas in the grazed steers were numerically larger than in those receiving the NG treatment. Fat thickness was significantly greater ( P < 0.05) in the NG steers than in the grazed steers. The intramuscular fat and marbling scores were not affected in the grazed steers. In conclusion, the carcass quality of grazed steers was similar to that of the NG steers at a similar final age, and the quantity of meat in the NG steers would be less than that of the GMP and GLP steers. Therefore, spring-born Wagyu steers should be grazed using the GLP supplement before fattening.

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Section: Resultsmentioning

confidence: 99%

The effects of grazing and supplemental protein concentrations during the grazing period on subsequent finishing performance and carcass quality in Japanese Black cattle steers

Sugimoto

Kuzuoka

Yayota

et al. 2004

Animal Science Journal

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“…1968). In the NG calves, the bodyweight/withers height ratio, a parameter sometimes called the ‘fattening index’(Oka et al . 1999), tended to be greater than in the GSBM and GCGM calves.…”

Section: Resultsmentioning

confidence: 80%

“…The high paunch girth/heart girth ratio in the GSBM and GCGM groups may be the result of the development of the digestive tract (Omori et al 1968). In the NG calves, the bodyweight/withers height ratio, a parameter sometimes called the 'fattening index' (Oka et al 1999), tended to be greater than in the GSBM and GCGM calves. Therefore, the NG calves were probably fatter than the GSBM and GCGM calves at the end of the experiment.…”

Section: Growthmentioning

confidence: 93%

Effects of supplemental protein sources during the grazing period on performance, ruminal characteristics and blood constituents in early weaned growing Wagyu steer calves

Sugimoto

Yayota

Kuzuoka

et al. 2003

Animal Science Journal

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We investigated the effects of grazing and supplemental protein sources during the grazing period on growth performance, ruminal characteristics and blood constituents in 15 growing Wagyu steer calves weaned at 3 months of age. Each animal was allotted one of three treatments: (1) GSBM, soybean meal (SBM) supplemented as a protein source during a grazing period; (2) GCGM, corn gluten meal (CGM) supplemented as a protein source during a grazing period; or (3) NG, no grazing, in which steers were fed hay and GSBM concentrate only. The estimated rumen undegradable protein (RUP) concentration of CGM was higher than that of SBM. High RUP supplementation during the grazing period did not influence feed intake or growth performance. Compared with the NG treatment, the average daily gain in GSBM and GCGM calves was significantly depressed (P < 0.05). Bodyweight/withers height ratio in the NG calves tended to be greater than in the GSBM and GCGM calves. Final paunch girth/heart girth ratio in the GSBM and GCGM calves was significantly greater (P < 0.05) than in the NG calves. Supplementation with CGM did not influence ruminal ammonia nitrogen and blood constituents. These results indicate that CGM supplementation during the grazing period did not enhance the growth of Wagyu calves because the CGM diet probably did not elevate the metabolizable protein supply to the grazing calves above that of the SBM diet in our conditions.

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“…During the fattening process in beef cattle, restricted vitamin A feeding is commonly used to enhance fat marbling in the sirloin portions [12]. However, severe vitamin A deficiency in beef cattle given restricted vitamin A feeding has been recognized from 18–22 months old [7, 16] consistent with LDA events.…”

mentioning

confidence: 99%

“…Serum vitamin A (49 ± 34 IU/d l ) and vitamin E (219 ± 82 µ g/d l) values in beef cattle with LDA were significantly lower than those in non-LDA reference animals (114 ± 66 IU/d l and 449 ± 66 µ g/d l , respectively). During the fattening process in beef cattle, restricted vitamin A feeding is commonly used to enhance fat marbling in the sirloin portions [ 12 ]. However, severe vitamin A deficiency in beef cattle given restricted vitamin A feeding has been recognized from 18–22 months old [ 7 , 16 ] consistent with LDA events.…”

mentioning

confidence: 99%

Characteristics of Fluid Composition of Left Displaced Abomasum in Beef Cattle Fed High-Starch Diets

Ichijo

Satoh

Yoshida

et al. 2014

The Journal of Veterinary Medical Science

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To clarify the pathophysiology of left displaced abomasum (LDA), beef cattle fed high-starch diets were examined. The abomasal pH in beef cattle with LDA was lower than that in non-LDA reference animals (data from beef cattle at an abattoir), suggesting that it facilitated acidity. Bacteriological examinations of the abomasal fluid in cattle with LDA revealed the presence of Pseudomonas spp., Clostridium spp. and Candida spp., presumably reflecting the accelerated influx of ruminal fluid into the abomasum. Biochemical analyses of serum revealed that LDA cattle had higher lactic acid and lower vitamin A and E levels than non-LDA reference animals. These results indicate that beef cattle with LDA may suffer from vitamin A and E deficiencies due to maldigestion of starch and the high acidity of abomasal fluid.

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Effects of Roughage Levels on Growth, Beef Quality, Ruminal Contents and Serum Constituents in Japanese Black Steers during the Growing Period

Cited by 7 publications

References 29 publications

The effects of grazing and supplemental protein concentrations during the grazing period on subsequent finishing performance and carcass quality in Japanese Black cattle steers

The effects of grazing and supplemental protein concentrations during the grazing period on subsequent finishing performance and carcass quality in Japanese Black cattle steers

Effects of supplemental protein sources during the grazing period on performance, ruminal characteristics and blood constituents in early weaned growing Wagyu steer calves

Characteristics of Fluid Composition of Left Displaced Abomasum in Beef Cattle Fed High-Starch Diets

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