中国粮油学报
中國糧油學報
중국량유학보
JOURNAL OF THE CHINESE CEREALS AND OILS ASSOCIATION
2010年
2期
101-106
,共6页
王建平%王加启%李发弟%卜登攀%霍小凯%郭同军%魏宏阳%周凌云%梁建光%王光文%袁耀明
王建平%王加啟%李髮弟%蔔登攀%霍小凱%郭同軍%魏宏暘%週凌雲%樑建光%王光文%袁耀明
왕건평%왕가계%리발제%복등반%곽소개%곽동군%위굉양%주릉운%량건광%왕광문%원요명
热应激%奶牛%能量代谢%生产性能
熱應激%奶牛%能量代謝%生產性能
열응격%내우%능량대사%생산성능
heat stress%dairy cow%energy metabolism%performance
研究饱和脂肪酸对泌乳中期热应激奶牛产奶性能、采食量和能量代谢的影响.选择产后150～210 d的中国荷斯坦奶牛48头,采用完全随机区组试验设计,根据产奶量、分娩时间和胎次分为对照组、1.5%和3%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.结果显示,日粮添加饱和脂肪酸显著提高奶牛产奶量(P<0.05),1.5%与3%脂肪组之间差异不显著;乳脂和总固体产量,3%脂肪组显著高于1.5%脂肪组和对照组(P<0.05),1.5%脂肪组显著高于对照组(P<0.05).饱和脂肪酸对DMI无影响,净能和粗脂肪采食量随脂肪添加量而呈线性增加(P<0.01).3%和1.5%脂肪组分别比对照组净能转化率提高5.69%和6.04%;粗蛋白转化率分别提高8.48%和6.20%,体重和体况三组间无差异.血液中NEFA含量,3%脂肪组显著低于对照组(P<0.05);血糖、胆固醇、BHBA、胰岛素三组间无差异.饱和脂肪酸可以提高奶牛产奶性能和维持能量平衡,对能量代谢、采食量、体重和体况无明显影响.
研究飽和脂肪痠對泌乳中期熱應激奶牛產奶性能、採食量和能量代謝的影響.選擇產後150～210 d的中國荷斯坦奶牛48頭,採用完全隨機區組試驗設計,根據產奶量、分娩時間和胎次分為對照組、1.5%和3%飽和脂肪痠試驗組.試驗期間牛捨最小濕熱指數(THI)在72以上.結果顯示,日糧添加飽和脂肪痠顯著提高奶牛產奶量(P<0.05),1.5%與3%脂肪組之間差異不顯著;乳脂和總固體產量,3%脂肪組顯著高于1.5%脂肪組和對照組(P<0.05),1.5%脂肪組顯著高于對照組(P<0.05).飽和脂肪痠對DMI無影響,淨能和粗脂肪採食量隨脂肪添加量而呈線性增加(P<0.01).3%和1.5%脂肪組分彆比對照組淨能轉化率提高5.69%和6.04%;粗蛋白轉化率分彆提高8.48%和6.20%,體重和體況三組間無差異.血液中NEFA含量,3%脂肪組顯著低于對照組(P<0.05);血糖、膽固醇、BHBA、胰島素三組間無差異.飽和脂肪痠可以提高奶牛產奶性能和維持能量平衡,對能量代謝、採食量、體重和體況無明顯影響.
연구포화지방산대비유중기열응격내우산내성능、채식량화능량대사적영향.선택산후150～210 d적중국하사탄내우48두,채용완전수궤구조시험설계,근거산내량、분면시간화태차분위대조조、1.5%화3%포화지방산시험조.시험기간우사최소습열지수(THI)재72이상.결과현시,일량첨가포화지방산현저제고내우산내량(P<0.05),1.5%여3%지방조지간차이불현저;유지화총고체산량,3%지방조현저고우1.5%지방조화대조조(P<0.05),1.5%지방조현저고우대조조(P<0.05).포화지방산대DMI무영향,정능화조지방채식량수지방첨가량이정선성증가(P<0.01).3%화1.5%지방조분별비대조조정능전화솔제고5.69%화6.04%;조단백전화솔분별제고8.48%화6.20%,체중화체황삼조간무차이.혈액중NEFA함량,3%지방조현저저우대조조(P<0.05);혈당、담고순、BHBA、이도소삼조간무차이.포화지방산가이제고내우산내성능화유지능량평형,대능량대사、채식량、체중화체황무명현영향.
To investigate the effect of supplemental saturated fatty acids on mid-lactating heat stress dairy cows, forty eight Chinese Holstein cows (150～210 DIM) were divided into three groups according to random block design with milk yield, DIM and parity. The animals were fed with diets contained 0%, 1.5% and 3% saturated fatty acids for group 1 ( control), group 2 and group 3, respectively. The minimum THI was normally more than 72 during experimental period. Results: The milk yield is significantly improved by supplemental saturated fatty acids (P< 0.05). The yield of milk fat and total solid for group 3 is significant higher than that for group2 or control (P< 0.05), and that for group 2 is higher than for control (P<0.05). There is no difference among the cows in dry matter intake. The intake of NEI and EE linearly increases with the increase of fat supplementation (P<0.01 ). Compared with control, the conversions of NEL and CP for group3 are 5.69% and 8.48% higher respectively, and for group 2 are 6.04% and 6.20% higher respectively. There is no difference among the groups in body weight gain and body condition score. The concentration of serum NEFA for group 3 is significantly lower than control (P<0.05). There is no difference among the cows in concentrations of serum glucose, cholesterol, BHBA, and insulin. It is concluded that supplemental saturated fat acids are benefit to mid-lactating heat stress dairy cows in performance and energy balance, no evident effect on energy metabolism, dry matter intake, body weight gain and body condition score.
