CAJ | 학술논문

本试验旨在探讨不同化学形式微量元素对奶牛生产性能和血清指标的影响. 选择年龄、胎次、泌乳天数和产奶量相近的健康荷斯坦奶牛32头,随机分为4组,即在基础饲粮中添加120 g/d干酒糟及其可溶物( DDGS)的对照组、120 g/d无机微量元素的试验Ⅰ组、15 g/d有机微量元素+105 g/d DDGS的试验Ⅱ组和10 g/d有机微量元素+110 g/d DDGS的试验Ⅲ组,每组8头. 试验期90 d. 结果表明,1)与对照组相比,试验Ⅰ组产奶量有下降的趋势,试验Ⅱ组和Ⅲ组产奶量有提高的趋势,试验组乳成分、干物质采食量和呼吸频率差异均不显著( P>0.05);2)第30天,试验Ⅲ组血清谷胱甘肽过氧化物酶( GSH-Px)活性显著高于其他各组( P<0.05);3)第30天,试验Ⅲ组血清铜含量显著高于对照组、试验Ⅰ组(P<0.05),硒含量显著高于试验Ⅱ组( P<0.05) ,第60天钙含量显著高于试验Ⅰ组( P<0.05);4)各组间奶牛血清激素、免疫球蛋白G ( IgG)含量差异均不显著( P>0.05). 本试验条件下,热应激奶牛饲粮添加有机微量元素能够改善奶牛生产性能,提高奶牛血清抗氧化能力,血清IgG和锌、硒含量,并且呈剂量依赖.
본시험지재탐토불동화학형식미량원소대내우생산성능화혈청지표적영향. 선택년령、태차、비유천수화산내량상근적건강하사탄내우32두,수궤분위4조,즉재기출사량중첨가120 g/d간주조급기가용물( DDGS)적대조조、120 g/d무궤미량원소적시험Ⅰ조、15 g/d유궤미량원소+105 g/d DDGS적시험Ⅱ조화10 g/d유궤미량원소+110 g/d DDGS적시험Ⅲ조,매조8두. 시험기90 d. 결과표명,1)여대조조상비,시험Ⅰ조산내량유하강적추세,시험Ⅱ조화Ⅲ조산내량유제고적추세,시험조유성분、간물질채식량화호흡빈솔차이균불현저( P>0.05);2)제30천,시험Ⅲ조혈청곡광감태과양화물매( GSH-Px)활성현저고우기타각조( P<0.05);3)제30천,시험Ⅲ조혈청동함량현저고우대조조、시험Ⅰ조(P<0.05),서함량현저고우시험Ⅱ조( P<0.05) ,제60천개함량현저고우시험Ⅰ조( P<0.05);4)각조간내우혈청격소、면역구단백G ( IgG)함량차이균불현저( P>0.05). 본시험조건하,열응격내우사량첨가유궤미량원소능구개선내우생산성능,제고내우혈청항양화능력,혈청IgG화자、서함량,병차정제량의뢰.
This experiment was conducted to study the effects of different chemical forms of trace element on milk performance and serum parameters of cows. Thirty two healthy Holstein cows with similar age, parity, lactation days and milk yield were randomly divided into four groups with 8 cows per group. Added 120 g/d distiller dried grains ( DDGS) to control group, added 120 g/d inorganic trace element to test groupⅠ, added 15 g/d organic trace element and 105 g/d DDGS to test groupⅡ, and added 10 g/d organic trace element and 110 g/d DDGS to test groupⅢ. The test lasted for 90 days. The results showed as follows:1) compared with control group, milk yield of test groupⅠ had a trend to decline, while that of test groupⅡ and test groupⅢhad trends to increase; the differences of milk composition, dry matter intake, breathing rate were not signifi-cant among test groups ( P>0.05);2) on the 30th day, serum glutathione peroxidase ( GSH-Px) activity of test groupⅢ was significantly higher than that of the other groups( P<0.05);3) on the 30th day, the content of serum copper was significantly higher than that of control group and test groupⅠ( P<0.05) , and serum se-lenium content was significantly higher than that of test group Ⅱ ( P<0.05); on the 60th day, serum calcium content of test group Ⅲ was significantly higher than that of test group Ⅰ( P<0.05); 4) serum hormone and immunoglobulin G ( IgG) contents had no significant differences among groups( P>0.05) . Thus it can be seen that, under conditions of the present study, adding organic trace element in diet for heat stressed cows can make milk performance improved, serum antioxidant capacity and the contents of zinc, selenium and IgG in-creased, and the effects are dose dependent.