本文關(guān)鍵詞：蛋白水平對(duì)早期斷奶雙胞胎湖羊公羔營(yíng)養(yǎng)物質(zhì)消化與血清指標(biāo)的影響　出處：《畜牧獸醫(yī)學(xué)報(bào)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 羔羊 雙胞胎 湖羊 蛋白水平 消化代謝

【摘要】：本試驗(yàn)旨在研究低蛋白水平及蛋白補(bǔ)償對(duì)早期斷奶雙胞胎湖羊公羔生長(zhǎng)性能、營(yíng)養(yǎng)物質(zhì)消化代謝及血清學(xué)指標(biāo)的影響。試驗(yàn)選取16對(duì)雙胞胎湖羊公羔,15日齡試驗(yàn)羊均斷母奶,采用配對(duì)試驗(yàn)設(shè)計(jì),分為兩個(gè)處理,一個(gè)處理組飼喂蛋白水平分別為25%和21%的代乳粉和開食料,記為正常蛋白組(NP),另一個(gè)處理組飼喂等能低蛋白水平的代乳粉(CP:19%)和開食料(CP:15%),記為低蛋白組(LP),每一對(duì)雙胞胎羔羊隨機(jī)分到NP和LP組,代乳粉飼喂至60日齡,各組同時(shí)補(bǔ)飼)開食料。60~90日齡,NP和LP組均飼喂蛋白水平為21%的開食料。試驗(yàn)結(jié)果表明,LP組30~90日齡體重均顯著低于NP組(P0.05)。50~60日齡,LP組粗蛋白的表觀消化率和沉積氮含量顯著低于NP組(P0.05),而氮代謝率卻顯著高于NP組(P0.05);80~90日齡,LP組粗脂肪的表觀消化率和氮代謝率顯著高于NP組(P0.05)。60日齡,LP組血清尿素氮(BUN)濃度和IGF-Ⅰ水平顯著低于NP組(P0.05),而堿性磷酸酶(ALP)和谷丙轉(zhuǎn)氨酶(ALT)活性顯著高于NP組(P0.05);90日齡,LP組的ALP、ALT活性及生長(zhǎng)激素(GH)水平顯著高于NP組(P0.05)。哺乳期間,低蛋白日糧降低了羔羊的體重、血清BUN、IGF-Ⅰ水平及CP表觀消化率,但提高了氮的代謝率;蛋白補(bǔ)償30d后,體重仍然達(dá)不到正常水平。
[Abstract]:The aim of this study was to study the effects of low protein level and protein compensation on growth performance, digestion and metabolism of nutrients and serological indexes of early weaning twins, 16 pairs of male lambs were selected. The 15-day-old sheep were weaned and were divided into two treatments by paired test design. One treatment group was fed with milk substitute powder with protein level of 25% and 21% respectively, which was recorded as normal protein group. Another treatment group was fed with milk powder (CP: 19) and raw material (CP: 15). Each twin lamb was randomly divided into NP and LP groups. Milk substitute powder was fed to 60 days of age and supplemented in each group.) both NP and LP groups were fed with open diet with protein level of 21%. The results showed that: 1. The apparent digestibility and deposition nitrogen content of crude protein in LP group were significantly lower than those in NP group (P 0.05). The rate of nitrogen metabolism was significantly higher than that of NP group (P 0.05). The apparent digestibility and nitrogen metabolism rate of crude fat in LP group were significantly higher than those in NP group. The serum urea nitrogen bun concentration and IGF- 鈪，

本文編號(hào)：1401819