本文關(guān)鍵詞：不同發(fā)酵時間酵母培養(yǎng)物對艾拔益肉雞生長性能和免疫功能的影響　出處：《吉林農(nóng)業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 酵母培養(yǎng)物 肉仔雞 免疫 生長性能

【摘要】：本試驗旨在評價添加酵母培養(yǎng)物(益康XP和實驗室研制的酵母培養(yǎng)物)對肉仔雞生長性能、消化率和免疫功能的影響。試驗采用1日齡AA肉仔雞288只,隨機分成七組,分別飼喂基礎(chǔ)飼糧,基礎(chǔ)飼糧添加發(fā)酵12h(T1)、24h(T2)、36h(T3)、48h(T4)、60h(T5)的實驗室培養(yǎng)酵母培養(yǎng)物和益康XP,試驗周期為42d。每組6個重復(fù),每個重復(fù)8只肉仔雞。飼料配方按兩期配制,分為起始期(7-21d)和成長期(22-42d)。在7日齡時給肉仔雞進行新城疫免疫。在21和42日齡時,分別屠宰12只肉仔雞用于揮發(fā)性脂肪酸、血液生化指標和生長性能的測定。在第21天YC2和YC3組平均日增重顯著(P0.05)高于其他組。第42天YC4組平均日增重與其余各組差異顯著。21天YC1采食量最高而C組采食量最低;然而42天YC4組比其余各組采食量都高。YC3組纖維含量較其余各組差異性顯著(P0.05)。7-42天各組平均日采食量沒有顯著差異。7-21天飼料轉(zhuǎn)化率對照組顯著高于其余跟組(P0.05)。21天XP組的血清白蛋白含量顯著高于其余各組(P0.05)。TB含量21天YC3組顯著高于其余各組(P0.05)。42天YC3和YC4組較其余各組差異顯著(P0.05)。在42天各組的尿素含量并沒有顯示出顯著的差異。在42天YC3、YC4和XP組肌胃指數(shù)和脾臟指數(shù)相對其余各組表現(xiàn)出顯著性差異(P0.05)。XP組乙酸含量表現(xiàn)出顯著性差異(P0.05)。YC2和XP丙酸含量都顯著高于其余各組(P0.05)。丁酸的濃度沒有顯著差異。在21天YC2 YC3和XP組IgA較其余各組差異顯著(P0.05)。21天YC3和YC4組IgG顯著高于其余組(P0.05)。42天YC3組IgA、IgG均顯著高于其他組(P0.05)。相關(guān)研究結(jié)果表明,酵母培養(yǎng)物作為益生菌來源對動物的生長性能和免疫能力具有有益作用。添加酵母培養(yǎng)物可能會對有營養(yǎng)需求時或在受到其他應(yīng)激時的肉仔雞有一定的幫助作用。但在正常環(huán)境和飼養(yǎng)管理條件下,它對腸道形態(tài)的影響微乎其微。因此,我們必須把注意力放在尋找一個更合適的、更新穎的益生菌候選菌種上。關(guān)于酵母培養(yǎng)物我們不斷地探索理論知識,不斷地積累實踐的經(jīng)驗,其準確的作用機理、保護畜禽健康的適用性和對畜禽生產(chǎn)能力的提高需要再進行更深入的研究。
[Abstract]:The purpose of this experiment was to evaluate the effects of yeast culture (Yikang XP and yeast culture developed in laboratory) on growth performance, digestibility and immune function of broilers. 288 AA broilers of 1 day old were used in the experiment. They were randomly divided into seven groups. The basal diet was fed with basic diet. The basal diet was supplemented with fermentation for 12 h, T1, T1, 24 h, T2, T2, T3, T3, 48h, T4). The experimental period of yeast culture and Yikang XP was 42 days. Each group had 6 replicates and 8 broilers per replica. The feed formula was prepared in two stages. The broilers were immunized with Newcastle disease at the age of 7 days and at the age of 21 and 42 days. Twelve broilers were slaughtered for volatile fatty acids. Determination of blood biochemical indexes and growth performance. The average daily gain of YC2 and YC3 groups was significantly higher than that of YC3 group on the 21st day (P0.05). The average daily gain of YC4 group was significantly higher than that of other groups on the 42nd day. The YC1 intake was the highest in group C on day 21 and the lowest in group C. However, the content of fiber in YC4 group was higher than that in other groups on 42 days, and the fiber content in YC3 group was significantly higher than that in other groups (P0.05). There was no significant difference in the average daily feed intake among the groups at day 7-42. The feed conversion rate of the control group was significantly higher than that of the other groups (P0.05). The level of serum albumin in XP group on day 21 was significantly higher than that in other groups (P 0.05N. TB). The content of serum albumin in YC3 group on day 21 was significantly higher than that in other groups (P 0.05). There was no significant difference in urea content between YC3 group and YC4 group on 42nd day compared with other groups, but there was no significant difference in urea content in 42nd day group and 42nd day YC3 group. Compared with other groups, there were significant differences in muscle and stomach index and spleen index between YC4 and XP groups. The contents of propionic acid in YC2 and XP were significantly higher than those in other groups (P 0.05). There was no significant difference in butyric acid concentration. The IgA of YC2 YC3 and XP was significantly higher than that of other groups on day 21 (P < 0.05). The IgG of YC3 and YC4 group was significantly higher than that of YC3 group on day 21 (P 0.05) and YC3 group (P 0.05). 42 days later, IgA was significantly higher in YC4 group than that in other groups. IgG was significantly higher than that of other groups (P 0.05). Yeast culture as a probiotic source has beneficial effects on growth performance and immune ability of animals. Adding yeast culture may be helpful to broilers with nutritional needs or other stress. ... but under normal conditions and breeding management conditions. It has little effect on intestinal morphology. Therefore, we must focus on finding a more suitable, novel candidate for probiotics. We continue to explore theoretical knowledge about yeast cultures. It is necessary to further study the practical experience, the exact mechanism of action, the applicability of protecting the health of livestock and poultry, and the improvement of the production capacity of livestock and poultry.
【學(xué)位授予單位】：吉林農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：S831.5

【參考文獻】

相關(guān)期刊論文 前1條

1 ;中國飼料成分及營養(yǎng)價值表2005年第16版(續(xù))[J];中國飼料;2005年23期

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