Journal of the East Asian Society of Dietary Life (동아시아식생활학회지)

The East Asian Society of Dietary Life (동아시아식생활학회)
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Effects of Feeding TMR Feed with Dietary Citrus Byproducts on Chemical Properties of Raw Milk from Holstein Cow's Raw Milk

원유의 이화학적 특성에 미치는 감귤 부산물 TMR 사료 급여의 영향

  • Moon, Yoon-Hee (Dept. of Food Science and Biotechnology, Kyungsung University) ;
  • Yang, Seung-Ju (Jeju Animal Industry Promotion Institute) ;
  • Jung, In-Chul (Div. of Food Beverage and Culinary Arts, Daegu Technical University)
  • 문윤희 (경성대학교 식품생명공학과) ;
  • 양승주 (제주동물산업진흥원) ;
  • 정인철 (대구공업대학 식음료조리계열)
  • Received : 2009.06.22
  • Accepted : 2009.08.26
  • Published : 2009.10.31
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Abstract

In this study, the effects of feeding providing Holstein cows with with TMR feed including amended with undried citrus byproducts on the properties of their raw milk were investigated. Two samples were used for the experiment: T0 (raw milk produced by dairy cows fed with TMR feed not including citrus byproducts) and T1 (raw milk produced by cows fed with TMR feed including citrus byproducts). The All experiments were conducted with Holstein cows at a dairy farm in the on Jeju island, and were repeated three times, in each, after of which raw milk obtained from 7 cows of each samplein each group was analyzed[ED highlight - please ensure this is correct]. The daily milk yield and somatic cell numbers of T0 and T1 were 24.16 kg and 25.97 kg, and 660,000 thousands and 445,000 thousands, respectively, which means that feeding citrus byproducts to cows increases daily milk yield and reduces somatic cell numbers. There was were no significant differences between T0 and T1 in terms of the raw milk's total plate count, specific gravity, titration acidity, and or the amount of milk protein, lactose, nonfat solids, free amino acids and volatile compounds, while raw milk in T1 showed significantly lower levels of milk fat in raw milk. The antioxidant activity of raw milk was improved by citrus byproducts TMR feed containing citrus byproducts.

본 연구는 감귤 부산물 TMR 사료 급여가 젖소 원유의 품질에 미치는 영향을 검토하기 위하여 실시하였다. 감귤 부산물을 혼합하지 않은 TMR 사료를 급여한 원유를 T0, 그리고 감귤 부산물을 혼합한 TMR 사료를 급여한 원유를 T1이라 하였다. 젖소는 홀스타인종으로 제주도 소재 낙농 목장에서 사양 시험을 하였으며, 1회에 7 마리씩 3반복 실행하였다. T0 및 T1의 산유량은 각각 24.16 및 25.97 kg이고, 체세포수는 66만 및 44만5천 개로 감귤 부산물 급여에 의해 산유량이 증가하고 체세포수가 감소하였다. T0 및 T1 원유의 총균수는 각각 $2.05{\times}10^6$ 및 $1.97{\times}10^6$ CFU/mL로 유의적 차이가 없었다. T0 및 T1 원유의 비중은 각각 1.0335 및 1.0342로 비슷하고, 적정 산도는 각각 0.14% 및 0.14%로 같은 수준을 나타내었다. 원유의 유지방 함량은 T1이 4.03%로 낮고, 유단백, 유당, 무지유고형분 및 총 고형분 함량은 현저한 차이를 보이지 않았다. 원유의 휘발성 향기 성분은 감귤 부산물 급여에 의한 유의적 차이를 보이지 않았다. 원유의 항산화력은 감귤 부산물 TMR 사료 급여에 의해 향상되었다.

Keywords

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