奶牛營養(yǎng)與代謝病ppt課件-wenkub.com
2025-01-02 09:45 本頁面
【正文】 B甲基巴豆酸酰 CoA羧化酶參與亮氨酸代謝通路，圖中沒有顯示。 e n d otoxin r e leaseInf ecti o us D i se ases E nv i r onm entMet ri t i s Hi sta m in e S t res sMast i t i s C onc ussi onF oot R ot T raum aV aso c on str ac tion /d il ationL am in ae d e str u c tionHoof d e te r iorat ionL AM INIT IS導(dǎo)致板炎的原因（事件的結(jié)果導(dǎo)致板炎） 營養(yǎng) 環(huán)境 傳染病 子宮炎 乳房炎 蹄腐爛 組胺 應(yīng)激 震動 外傷（創(chuàng)傷） 板炎 蹄部變質(zhì) 板層破壞 血管收縮 /擴(kuò)張 革蘭氏陰性菌死亡和內(nèi)毒素釋放 PH值下降 產(chǎn)生乳酸 谷物過多 粗料切割過細(xì) 谷物懶漢喂法（谷物飼喂次數(shù)過少） 05010015020025030035040045050010 20 30 40 50PREDICTION OF MICROBIAL NITROGEN FLOWS TO THE DUODENUM IN DRY AND LACTATING COWS (From Firkin et al. 1998) Microbial Nitrogen flows (g/day) Net Energy (Lactation) Mcal/day Dry Cow Lactating Rations . Regression Firkin et al. (1998) (From published data) 微生物氮流入干奶牛和泌乳奶牛十二指腸的預(yù)測 干奶牛 泌如日糧 (發(fā)表的數(shù)據(jù) ) 凈能 (產(chǎn)奶 )Mcal/日 微生物氮流量(克/日) 051015202530D r y C ow s 30 Li tr e s 40 Li tr e sF i r k i n e t al . (199 8)N R C (1989 )Methionine g/d REQUIREMENT FOR METHIONINE IN HIGH YIELDING DAIRY COWS COMPARED TO ESTIMATED SYNTHESIS OF MICROBIAL METHIONINE IN RUMEN 40 litres methionine requirement 30 litres methionine requirement Milk Production L/day 高產(chǎn)奶牛的蛋氨酸需要量與估測的瘤胃微生物蛋氨酸合成的比 較 產(chǎn) 40升奶蛋氨酸需要量 產(chǎn) 30升奶蛋氨酸需要量 牛奶產(chǎn)量 40升 干奶牛 蛋氨酸 克/日 AMINO ACID COMPOSITION OF PROTEIN MEALS AND RUMEN BACTERIAL PROTEIN (G/100G AMINO ACIDS) MET H IO NI NE CY S T IN E L Y S IN EMIL KME AT ME ALBL OOD ME A LF I S H MEA LCOT T ONS E E D MEALS UN F L O W E R ME A LRAP E S E E D MEALS OYA BE ANMAIZ E GRA I NMAIZ E G L UT E N F E E DS ORGH UM G RA INBACT E RI A 4 7 8 0 3 8 9 0 0 0 1 0Mi n Ma x 1 .1 2 8 7 1 1 2 0 7 3 0 3 6 410 .10 1 8 1 0 0 8 6 9 .5蛋白飼料的氨基酸組成和微生物蛋白的氨基酸組成 (克 /100克氨基酸 0 蛋氨酸 胱氨酸 賴氨酸 奶 肉粉 血粉 魚粉 棉粕 葵花粕 菜粕 大豆 玉米 玉米蛋白飼料 高粱 細(xì)菌 最低 最高 PROBLEMS OCCUR AT CALVING * Dry matter intakes fall (Van Saun 1993, Grummer 1995) * Protein accretion of uterus doubles in last 60 days (Bell et al. 1998) * Uterine uptake of amino acids represents 70% of total material pool (Bell 1995) * Colostrum (rich in sulphur amino acids containing immunoglobulins) and the high milk yield drains the animal of these essential amino acids * Histidine and methionine first limiting amino acids for milk protein synthesis * Transient hypocalcaemia reduces calcium pool. (May l
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