[논문]Milk Yield and Immune Response of Periparturient and Early Lactation Friesian Cows Fed Diets Supplemented with a High Level of Amino-acid Chelated Chromium

Terramoccia, S.; Bartocci, S.; Lillini, E.

doi:10.5713/ajas.2005.1098

Milk Yield and Immune Response of Periparturient and Early Lactation Friesian Cows Fed Diets Supplemented with a High Level of Amino-acid Chelated Chromium 원문보기

Asian-Australasian journal of animal sciences, v.18 no.8, 2005년, pp.1098 - 1104

Terramoccia, S. (C.R.A. Istituto Sperimentale per la Zootecnia) , Bartocci, S. (C.R.A. Istituto Sperimentale per la Zootecnia) , Lillini, E. (Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana)

Abstract ▼ AI-Helper

The trial was carried out on twenty-one Friesian cows at the end of eight months gestation, nine multiparous and twelve primiparous; allocated into three groups (1 control, 2 and 3 experimental). The same diet was administred to all three groups before partum (12.8 kg DM/head/day) and after partum (18.8 kg DM/head/day). The cows in groups 2 and 3 received two different daily quantities of amino-acid chelated chromium (0.6 and 1.2 mg Cr/kg DM) from 4 weeks prior to presumed parturition to 6 weeks after. The milk yield control was carried out at 15, 30, 42 and 60 days. All animals were immunised two weeks prior to the presumed parturition and two weeks after with the following antigens: ovalbumin and brucellergene. Blood samples were collected weekly to monitor humoral and cell-mediated immune responses. When analysing the results of antibody immunity (ovalbumin) in the sixth blood collection both treated groups significantly increased compared to group 1 (0.5230 and 0.4536 vs. 0.1812 OD; p<0.05). The results of the cell-mediated immune response (brucellergene) had significant differences (p<0.10) in correspondence to the third (between group 2 and control) and the fifth (between groups 3 and 2) blood collection. Significant differences in fat corrected milk were observed at 42 days between group 3 and the other two groups (31.01 vs. 26.99 and 28.66 kg/d, p<0.05) and at 60 days between group 3 and control (30.88 vs. 26.69 kg/d, p<0.05). Before partum and at partum a positive immune response was obtained with a lower dose of chromium. After partum a positive immune response, anti-OVA indicator, was obtained with the higher dose of chromium while, $\gamma$-IFN indicator, with the lower dose. A significant increase of the milk yield resulted at both 42 and 60 days with the highest level of chromium.

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문제 정의

The aim of this work was to study the effects of chromium supplementation on immune responses and milk yield with the purpose of reducing the acute physical stress of dairy cows during the last phase ofthe gestation up to the peak ofthe lactation.
The aim of this work was to study the effects of chromium supplementation on immune responses and milk yield with the purpose of reducing the acute physical stress of dairy cows during the last phase ofthe gestation up to the peak ofthe lactation.

제안 방법

In the test negative, positive and blank (plasma of non stimulated cells) controls were inserted; the interpretation of the results were made from the absorbance values obtained (optical density) superior to the basal values detected before immunisation.

대상 데이터

The trial was carried out on twenty-one Friesian cows at the end of the eighth month of gestation, nine multiparous (605.60±41.65 kg) and twelve primiparous (531.23±21.62 kg). The animals were divided into three groups of three multiparous and four primiparous: group 1, 2 and 3.

이론/모형

Feed samples were submitted to the following chemical determinations: dry matter (DM), crude protein (CP), crude fibre (CF), ether extract (EE), ash, neutral-detergent fibre (NDF), acid-detergent fibre (ADF), acid-detergent lignin (ADL). All the analyses were performed according to the methods of Association of Official Analytical Chemists (AOAC, 1984) and of Goering and Van Soest (1970) for cell wall constituents; furthermore the non structural carbohydrates (NSC) were calculated as reported by Van Soest et al. (1991). The above listed parameters for both diets were calculated proportionally to the percentage ofthe feedstuffs components.

성능/효과

Concerning the average yield of FCM at 60 days, group 3 significantly increased compared to group 1 (30.88 vs. 26.69 kg/d, p<0.05).
Considering the daily average yield of FCM at 42 days significant differences were observed between group 3 and the other two groups (31.01 vs. 26.99 and 28.66 kg/d, p<0.05).

참고문헌 (25)

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상세보기
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DOI : 10.5713/ajas.2005.1098 [무료]
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