發(fā)布時(shí)間：2018-10-15 09:40

【摘要】：本試驗(yàn)旨在研究妊娠后期母羊飼糧精料比例對(duì)羔羊生長性能、消化性能和血清抗氧化指標(biāo)的影響。試驗(yàn)選用66只妊娠90 d、平均體重為(44.45±2.20)kg的初產(chǎn)湖羊,按照體重相近原則隨機(jī)分為3組,每組11個(gè)重復(fù),每個(gè)重復(fù)2只。各組母羊妊娠期飼糧精料比例分別為50%、40%和30%,分娩后母羊飼喂相同的全混合日糧(TM R)。羔羊10日齡,每只母羊取1只羔羊斷母乳,飼喂代乳粉;15日齡補(bǔ)飼開食料;20日齡補(bǔ)飼苜蓿干草,自由采食至60日齡。每10 d測(cè)定1次羔羊體重,51~60日齡進(jìn)行羔羊消化代謝試驗(yàn),20和60日齡采集羔羊血液測(cè)定血清抗氧化指標(biāo)。結(jié)果表明:妊娠后期母羊飼糧精料比例對(duì)羔羊1、10、20、30、40、50、60日齡體重,20、60日齡體尺指標(biāo)及營養(yǎng)物質(zhì)表觀消化率均無顯著影響(P0.05)。隨母羊飼糧精料比例降低,20日齡羔羊血清總抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)活性極顯著升高(P0.01),60日齡50%組顯著或極顯著低于其他2組(P0.05或P0.01);30%組20和60日齡羔羊血清谷胱甘肽過氧化物酶(GSH-Px)活性極顯著高于其他2組(P0.01);血清中MDA的含量在20日齡時(shí)隨母羊飼糧精料比例的降低而極顯著降低(P0.01),60日齡時(shí)50%組顯著高于30%組(P0.05)。結(jié)果提示,妊娠后期母羊飼糧的精料比例對(duì)產(chǎn)后早期斷奶羔羊的體重、體尺、營養(yǎng)物質(zhì)表觀消化率無顯著影響,但隨母羊飼糧精料比例的降低,羔羊血清的抗氧化能力提高。
[Abstract]:The aim of this study was to study the effects of dietary concentrate ratio on growth performance, digestibility and serum antioxidant index of sheep in late pregnancy. 66 newly born Hu sheep with an average body weight of (44.45 鹵2.20) kg on the 90th day of gestation were randomly divided into 3 groups according to the principle of similar body weight, with 11 replicates in each group and 2 in each replica. The ratio of dietary concentrate in gestational period was 50% and 30%, respectively. After delivery, the ewe were fed the same total mixed diet (TM R). In 10 days old lamb, one lamb was cut off milk and fed with milk powder; 15 days old was supplemented with open diet; 20 days old was supplemented with alfalfa hay and fed freely until 60 days old. The body weight of lambs was measured once every 10 days. The digestive and metabolic tests were carried out at the age of 51 ~ 60 days. The blood samples of 20 and 60 days old lambs were collected for the determination of serum antioxidant index. The results showed that there was no significant effect on body weight, body size index and apparent digestibility of nutrients in the later gestational period (P0.05). The serum total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) activity of 20 day old lambs were significantly higher than those of the other two groups (P0.01), and the serum of 20 and 60 day old lambs of 30% group were significantly lower than those of the other two groups (P0.05 or P0.01), and the activity of superoxide dismutase (SOD) was significantly lower than that of the other two groups (P0.05 or P0.01). The activity of glutathione peroxidase (GSH-Px) was significantly higher than that of the other two groups (P0.01), and the content of MDA in serum decreased significantly with the decrease of diet concentrate ratio at the age of 20 days (P0.01), and that in the 50% group at 60 days old was significantly higher than that in the 30% group (P0.05). The results showed that there was no significant effect on body weight, body size and apparent digestibility of nutrients of weaned lambs at the later stage of pregnancy, but the antioxidant capacity of lamb serum increased with the decrease of dietary concentrate ratio.
【作者單位】： 中國農(nóng)業(yè)科學(xué)院飼料研究所農(nóng)業(yè)部飼料生物技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家肉羊產(chǎn)業(yè)技術(shù)體系建設(shè)專項(xiàng)資金(CARS-39) 南方地區(qū)幼齡草食畜禽飼養(yǎng)技術(shù)研究(201303143) 中國農(nóng)業(yè)科學(xué)院飼料研究所基本科研業(yè)務(wù)費(fèi)(1610382017009)
【分類號(hào)】：S826.5

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