饱和脂肪酸对高温环境条件下泌乳中期奶牛产奶性能及牛奶脂肪酸组成的影响
포화지방산대고온배경조건하비유중기내우산내성능급우내지방산조성적영향
Effects of Supplementation of Saturated Fatty Acid on Milk Production and Milk Fatty Acid Profile of Mid-lactating Cows during Hot Weather
  • 万方数据
    动物营养学报 동물영양학보
    ACTA ZOONUTRIMENTA SINICA
    2009年 3期 301-311 ,共11页

    王建平%王加启%卜登攀%霍小凯%郭同军%魏宏阳%周凌云%李发弟%梁建光%王光文%袁耀明

    왕건평%왕가계%복등반%곽소개%곽동군%위굉양%주릉운%리발제%량건광%왕광문%원요명

    热应激%奶牛%产奶量%脂肪酸%乳组成 熱應激%奶牛%產奶量%脂肪痠%乳組成
    열응격%내우%산내량%지방산%유조성
    Heat stress%Dairy cows%Milk yield%Fatty acid%Milk component
    本文旨在研究饱和脂肪酸对高温环境条件下泌乳中期奶牛产奶性能和牛奶中脂肪酸组成的影响.选择产后150～210 d的中国荷斯坦奶牛48头,根据产奶量、分娩时间和胎次分为对照组(SFA 0)、1.5%(SFA 1.5)和3.0%(SFA 3.0)饱和脂肪酸试验组.试验期间牛舍最小湿热指数(THI)在72以上.试验结果,日粮添加饱和脂肪酸提高4%乳脂校正产奶量(P＜0.05),SFA 1.5与SFA 3.0脂肪组之间差异不显著(P＞0.05).乳脂和总固形物含量,SFA 3.0组高于对照组(P＜0.05),SFA 1.5组与对照组和SFA 3.0组间差异均不显著(P＞0.05).乳蛋白、乳糖、乳尿素氮和乳中体细胞评分各组间差异均不显著(P＞0.05).日粮添加饱和脂肪酸的量对乳脂和乳总固形物呈线性增加(P＜0.05),对乳蛋白的含量呈二次曲线增加(P＜0.05).中链、长链、长链不饱和、总不饱和、t10c12CLA、总饱和脂肪酸、长链不饱和与总不饱和脂肪酸的比例各组间差异均不显著(P＞0.05).SFA 3.0组短链脂肪酸低于对照组(P＜0.01)和SFA1.5组(P＜0.05),SFA 1.5组与对照组差异不显著(P＞0.05).日粮添加饱和脂肪酸呈线性降低乳中短链脂肪酸含量(P=0.03)和c9t11CLA含量(P＜0.01),SFA 0、SFA1.5和SFA 3.0组乳中c9t11CLA含量分别为0.72、0.64和0.55 g/100 g脂肪.结果表明,泌乳中期热应激奶牛日粮添加饱和脂肪酸可显著提高产奶量、乳脂率和乳中总固形物含量;对乳中脂肪酸组成无明显影响;c9t11CLA含量显著降低,但仍在正常范围之内.
    본문지재연구포화지방산대고온배경조건하비유중기내우산내성능화우내중지방산조성적영향.선택산후150～210 d적중국하사탄내우48두,근거산내량、분면시간화태차분위대조조(SFA 0)、1.5%(SFA 1.5)화3.0%(SFA 3.0)포화지방산시험조.시험기간우사최소습열지수(THI)재72이상.시험결과,일량첨가포화지방산제고4%유지교정산내량(P＜0.05),SFA 1.5여SFA 3.0지방조지간차이불현저(P＞0.05).유지화총고형물함량,SFA 3.0조고우대조조(P＜0.05),SFA 1.5조여대조조화SFA 3.0조간차이균불현저(P＞0.05).유단백、유당、유뇨소담화유중체세포평분각조간차이균불현저(P＞0.05).일량첨가포화지방산적량대유지화유총고형물정선성증가(P＜0.05),대유단백적함량정이차곡선증가(P＜0.05).중련、장련、장련불포화、총불포화、t10c12CLA、총포화지방산、장련불포화여총불포화지방산적비례각조간차이균불현저(P＞0.05).SFA 3.0조단련지방산저우대조조(P＜0.01)화SFA1.5조(P＜0.05),SFA 1.5조여대조조차이불현저(P＞0.05).일량첨가포화지방산정선성강저유중단련지방산함량(P=0.03)화c9t11CLA함량(P＜0.01),SFA 0、SFA1.5화SFA 3.0조유중c9t11CLA함량분별위0.72、0.64화0.55 g/100 g지방.결과표명,비유중기열응격내우일량첨가포화지방산가현저제고산내량、유지솔화유중총고형물함량;대유중지방산조성무명현영향;c9t11CLA함량현저강저,단잉재정상범위지내.
    The objective of this study was to investigate the effects of supplemental saturated fatty acid on milk yield, components and fatty acid profile of mid-lactating cows during hot weather. A total of 48 Chinese Holstein cows were divided into three groups according to randomly block design by milk yield, days in milk (DIM,150～210 d)and parity, and were fed isonitroenous diets containing 0 (SFA 0), 1.5% (SFA 1.5) and 3.0% (SFA 3.0) saturated fatty acid, respectively. The minimum temperature humidity index (THI) was normally more than 72 during experimental period. Results showed that the milk yields were higher in SFA 1.5 and SFA 3.0 than those in SFA 0 (P＜0.05), and there was no difference between SFA 1.5 and SFA 3.0. The contents of milk fat and total solid in SFA 3.0 were higher than those in SFA 0 (P＜0.05) , and there were no differences among treatments in milk protein, lactose, milk urea nitrogen and somatic cell score (P＞0.05).The contents of milk fat and total solid were increased linearly (P＜0.05)and milk protein was increased quadratically (P＜0.05) by supplemental fatty acids. There were no differences among treatments in medium-chain, long-chain, long-chain unsaturated (LUFA) , total unsaturated (TUFA) , t10c12 conjugated linoleic acid (CLA) , total saturated fatty acid and the ratio of LUFA to TUFA (P＞0.05). The contents of short-chain fatty acid in SFA 3.0 were lower than those in SFA 0(P＜0.01) and SFA 1.5 (P＜0.05), but there was no difference between SFA 0 and SFA 1. 5. Supplemental saturated fatty acid decreased linearly the contents of medium-chain fatty acid (P = 0. 03) and c9t11CLA (P＜0.01). The contents of c9t11CLA in SFA 0, SFA 1.5 and SFA 3.0 were 0.72, 0.64 and 0.55 g/100 g fat acid methyl esters, respectively. It was concluded that milk yield, milk fat content and total solid were improved by supplemental saturated fatty acid. There was no effect of supplemental saturated fatty acid on milk fatty acid profile except that c9t11CLA was decreased within a normal level.
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