飼糧中添加甜菜堿對熱應(yīng)激蛋雞生產(chǎn)性能、蛋品質(zhì)及血清生化指標(biāo)的影響
發(fā)布時間:2018-08-23 14:43
【摘要】:本試驗旨在研究飼糧中添加甜菜堿對熱應(yīng)激蛋雞生產(chǎn)性能、蛋品質(zhì)及血清生化指標(biāo)的影響。選用健康的22周齡商品代羅曼褐蛋雞600只,隨機分成5組,每組8個重復(fù),每個重復(fù)15只雞。Ⅰ組為正對照組,飼喂基礎(chǔ)飼糧,正常溫?zé)岘h(huán)境,溫濕指數(shù)(THI)介于64.9~68.9;Ⅱ組為負對照組,飼喂基礎(chǔ)飼糧,熱應(yīng)激環(huán)境,THI72;Ⅲ~Ⅴ組分別在基礎(chǔ)飼糧中添加200、400和600 mg/kg甜菜堿,均為熱應(yīng)激環(huán)境,THI72。試驗期為14周。結(jié)果表明,各組間平均日采食量、料蛋比和破蛋率差異不顯著(P0.05)。與Ⅰ組相比,Ⅱ組顯著降低了入舍母雞產(chǎn)蛋率、入舍母雞產(chǎn)蛋重及血清總蛋白(TP)含量、堿性磷酸酶(AKP)活性(P0.05),顯著提高了血清中谷草轉(zhuǎn)氨酶(GOT)、肌酸激酶(CK)和谷丙轉(zhuǎn)氨酶(GPT)活性(P0.05)。與Ⅱ組相比,Ⅳ組入舍母雞產(chǎn)蛋率、入舍母雞產(chǎn)蛋量和血清TP含量均顯著提高(P0.05),Ⅴ組入舍母雞產(chǎn)蛋量及血清TP、白蛋白(ALB)含量也顯著提高(P0.05),而Ⅳ組和Ⅴ組的血清CK、GPT活性卻顯著降低(P0.05),且Ⅴ組的血清甘油三酯(TG)含量也顯著降低(P0.05)。綜上所述,熱應(yīng)激可使產(chǎn)蛋雞的新陳代謝和生理機能發(fā)生變化,導(dǎo)致生產(chǎn)性能下降,而飼糧中添加甜菜堿可以提高入舍母雞產(chǎn)蛋率和入舍母雞產(chǎn)蛋重,并改善熱應(yīng)激對蛋雞的損傷,飼糧中甜菜堿的適宜添加量為400 mg/kg。
[Abstract]:The purpose of this study was to study the effects of betaine supplementation on the performance, egg quality and serum biochemical indexes of heat stress layers. A total of 600 healthy 22-week-old commercial Daroman brown laying hens were randomly divided into 5 groups with 8 replicates in each group and 15 chickens in each replica. Group 鈪,
本文編號:2199379
[Abstract]:The purpose of this study was to study the effects of betaine supplementation on the performance, egg quality and serum biochemical indexes of heat stress layers. A total of 600 healthy 22-week-old commercial Daroman brown laying hens were randomly divided into 5 groups with 8 replicates in each group and 15 chickens in each replica. Group 鈪,
本文編號:2199379
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