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Effect of Feeding Whole Crop Barley Silage- or Whole Crop Rye Silage based-TMR and Duration of TMR Feeding on Growth, Feed Cost and Meat Characteristics of Hanwoo Steers

청보리 사일리지 TMR 또는 청호밀 사일리지 TME 급여 및 급여기간이 거세 한우의 증체, 사료비 및 육질특성에 미치는 효과

  • Received : 2012.02.14
  • Accepted : 2012.04.19
  • Published : 2012.04.30

Abstract

Feeding trial was conducted with 80 Hanwoo steers (7.5 months of age, 204.4 kg body weight) for 680 days from growing period to late fattening period to examine the feeding value of whole crop barley silage TMR (BS-TMR) and whole crop rye silage TMR (RS-TMR) on body gain, feed cost, slaughter characteristics and quality characteristics of $longissimus$ $dorsi$ muscle. Dietary treatments were conventional separate feeding of concentrate and rice straw (control), feeding BS TMR up to middle fattening period and same diet as for control during late fattening period (BS-TMR I), feeding BS-TMR for whole experimental period (BS-TMR II), feeding RS TMR up to middle fattening period and same diet as for control during late fattening period (RS-TMR I) and RS TMR for whole experimental period (RS-TMR II). Sixteen castrated calves were assigned to each treatment (4 pens, 4 heads per pen). Pens in each treatment were randomly distributed. Feeding both BS silage TMR and RS silage TMR slightly increased body gain of Hanwoo steers at the stages of growing and early fattening, and increased (P<0.0001) at middle fattening compared to feeding control diet while control diet tended to increase body gain at late fattening stage compared to feeding BS-TMR I, BS-TMR II and RS-TMR I diets. Total body gain was slightly increased in Hanwoo steers fed both I and II for BS and RS TMR compared to that in control diet. Feed cost per kg gain per head was relatively low in the Hanwoo steers fed silage TMRs to that fed control diet. Carcass weight, back fat thickness and $longissimus$ $dorsi$ area of Hanwoo steers tended to increase but lowered (P<0.047) yield index by feeding silage TMRs. Feeding BS TMR slightly decreased marbling score but no difference was found in the number of head over grade 1 between diets. Control diet tended to improve yield grade compared to silage TMRs. Chemical composition, water holding capacity, drip loss, cooking loss and pH, color and fatty acid composition of $longissimus$ $dorsi$ were not affected by experimental diets and feeding duration of silage TMRs. Shear force, however, was increased (P<0.046) by silage TMRs without difference between them compared to control diet. Based on the results of the current study, BS TMR and RS TMR could improve body gain and reduce feed cost without deteriorating meat quality compared to separate feeding of concentrate and rice straw. Overall feeding value was similar between BS TMR and RS TMR.

Keywords

Hanwoo steers;Silage TMR;Body gain;Feed cost;Carcass characteristics

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Cited by

  1. Effect of Different Forages on Growth Performance, Meat Production and Meat Quality of Hanwoo Steers : Meta-analysis vol.32, pp.2, 2012, https://doi.org/10.5333/KGFS.2012.32.2.175
  2. Study on Nutritive Values of Whole Crop Barley Varieties Grown in a Paddy Field vol.33, pp.1, 2013, https://doi.org/10.5333/KGFS.2013.33.1.30
  3. Examination of Availability of Whole Crop Silage TMR for Late Fattening Hanwoo Steers in the Cattle vol.33, pp.2, 2013, https://doi.org/10.5333/KGFS.2013.33.2.131
  4. Effects of Bacterial Inoculants and Cutting Height on Fermentation Quality of Barley Silage vol.34, pp.3, 2014, https://doi.org/10.5333/KGFS.2014.34.3.163

Acknowledgement

Grant : 청보리와 호밀 사일리지 TMR을 이용한 한우 및 낙농 사양 프로그램 개발

Supported by : 농림수산식품기술기획평가원