本文關(guān)鍵詞：艾蒿粉對肉仔雞生產(chǎn)性能和免疫功能的影響　出處：《內(nèi)蒙古農(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： 艾蒿粉 肉仔雞 生產(chǎn)性能 消化酶 小腸黏膜形態(tài) 免疫功能

【摘要】：本研究探討了日糧中添加不同劑量的艾蒿粉對肉仔雞生產(chǎn)性能和免疫功能的影響,旨在為艾蒿粉在肉仔雞生產(chǎn)中的合理應(yīng)用提供理論依據(jù)。試驗選擇1日齡AA肉仔雞240只,隨機(jī)分為5個日糧處理組,每個處理組6個重復(fù),每個重復(fù)8只雞。分別在基礎(chǔ)日糧中添加0、0.25%、0.5%、1%和2%的艾蒿粉配制成5種日糧,試驗期共42 d,分為前后兩期,每期21 d,結(jié)果表明如下：1.隨著艾蒿粉添加量的增加,試驗后期肉仔雞的ADG呈極顯著的一次線性(P=0.008)或顯著的二次曲線(P=0.013)增加,試驗全期肉仔雞的ADG呈顯著的一次線性(P=0.012)或顯著的二次曲線(P=0.012)增加,試驗后期肉仔雞的GH水平呈顯著的一次線性(P=0.047)增加。2.隨著艾蒿粉添加量的增加,肉仔雞在試驗后期粗蛋白的表觀代謝率呈顯著的二次曲線(P=0.040)增加。3.隨著艾蒿粉添加量的增加,21日齡時,肉仔雞空腸胰蛋白酶活力呈極顯著的二次曲線(P=0.009)增加,42日齡時,肉仔雞空腸胰蛋白酶活力呈顯著的二次曲線(P=0.039)增加,空腸脂肪酶活力呈顯著的二次曲線(P=0.019)增加,空腸淀粉酶活力呈顯著的二次曲線(P=0.040)增加,回腸糜蛋白酶活力呈二次曲線(P=0.061)增加趨勢；21日齡時,空腸絨毛高度呈顯著的二次曲線(P=0.044)增加；42日齡時,十二指腸絨毛高度與隱窩深度的比值呈二次曲線(P=0.086)增加趨勢,空腸絨毛高度呈顯著的一次線性(P=0.048)或顯著的二次曲線(P=0.018)增加,回腸絨毛高度呈二次曲線(P--0.074)趨勢,空腸和回腸的絨毛高度與隱窩深度的比值均呈二次曲線(P=0.063)、(P=0.087)增加趨勢。4.隨著艾蒿粉添加量的增加,肉色亮度L*值呈顯著的一次線性(P=0.046)降低,肉色紅度a*值則呈極顯著的一次線性(P=0.003)或極顯著的二次曲線(P=0.008)增加。5.隨著艾蒿粉添加量的增加,21日齡時,肉仔雞的法氏囊指數(shù)呈一次線性(P=0.093)增加趨勢；42日齡時,肉仔雞的脾臟指數(shù)呈顯著的一次線性(P=0.035)增加或二次曲線(P=0.080)’增加趨勢；21日齡時肉仔雞血清中的免疫球蛋白G(IgG)的含量呈一次線性(P=0.069)增加趨勢,免疫球蛋白M(IgM)的含量呈顯著的一次線性(P=0.020)增加或二次曲線(P=0.071)增加趨勢。以上結(jié)果表明：(1)日糧中添加適量的艾蒿粉可通過提升肉仔雞生長激素水平、提高消化酶活力并改善腸黏膜形態(tài)和提升營養(yǎng)物質(zhì)表觀代謝率等途徑促進(jìn)機(jī)體的生長,添加量0.25%時生長最快,添加量0.5%時飼料利用率最高；(2)日糧中添加適量的艾蒿粉可以通過降低肉色亮度、增加肉色紅度改善肉品質(zhì),添加量2%時效果最好;(3)日糧中添加適宜劑量的艾蒿粉可提高肉仔雞的免疫功能,添加量2%時效果最好。
[Abstract]:This study investigated the effects of dietary supplementation of mugwort powder on production performance and immune function of broilers, in order to provide theoretical basis for reasonable application of mugwort powder in broilers. The experiment selected 1 AA broilers were 240, were randomly divided into 5 dietary treatments, each treatment group 6 replicates of 8 chicks per replicate. 0,0.25% was added, the diets of 0.5%, 1% and 2% of the mugwort powder is prepared into 5 kinds of diets, the total experimental period of 42 d, divided into two periods, each 21 d, the results were as follows: 1. with the increase of Artemisia argyi powder, the end of the experiment broilers in a linear ADG significantly (P=0.008) or a significant two curve (P=0.013) increased during the whole period of broiler ADG showed a significant linear (P=0.012) or a significant two curve (P=0.012) increased, the end of the experiment of Broilers GH level is a linear. The (P=0.047) .2. increased with increasing addition of mugwort powder, broilers at the end of the experiment, the crude protein apparent metabolic rate was two times curve (P=0.040) increased significantly with the increase of.3. addition amount of mugwort powder, at the age of 21 days, the jejunum of broilers trypsin activity was two times curve significantly increased (P=0.009). At the age of 42 days, the jejunum of broilers trypsin activity was two times curve (P=0.039) significantly increased the lipase activity was two times curve was significantly increased (P=0.019), amylase activity in the jejunum is two times curve significantly increased (P=0.040), ileal chymotrypsin activity was two times curve (P=0.061) increased; at the age of 21 days, the villus height of jejunum show two curve (P=0.044) increased significantly; at the age of 42 days, the ratio of duodenal villus height and crypt depth was two times curve (P=0.086) increased, the villus height of jejunum showed an obvious linear (P=0.048) Or was two times curve (P=0.018) increased the ileal villus height was two times curve (P--0.074), the ratio of villus height and crypt depth of jejunum and ileum were two times curve (P=0.063),.4. (P=0.087) increased with the increase of Artemisia powder, L* showed a color brightness linear (P=0.046) significantly decreased, color red a* showed a significant linear (P=0.003) or a significant two curve (P=0.008).5. increased with increasing addition of mugwort powder, at the age of 21 days, the index of bursa of Fabricius in broilers showed a linear increase (P=0.093) trend; at the age of 42 days, the spleen index of Broilers showed a significant linear increase (P=0.035) or two (P=0.080) curve 'increasing trend; immunoglobulin G in serum at 21 days of age (IgG) content showed a linear increasing trend (P=0.069), immunoglobulin M (IgM) of the content. A significant linear increase (P=0.020) or two (P=0.071) curve increased. The above results show that: (1) adding argy wormwood powder can enhance the growth hormone levels in broiler diets, improve the digestive enzyme activity and improve intestinal mucosal morphology and enhance nutrient apparent metabolic rate so as to promote the body the growth amount of 0.25%, the fastest growth, adding 0.5% when the feed utilization rate; (2) adding argy wormwood powder in the diet can increase by reducing the color brightness, color red degree improve the meat quality, the best addition amount of 2%; (3) diet supplemented with appropriate dose of mugwort powder can improve the immune function of broilers, adding amount of 2% was the best.

【學(xué)位授予單位】：內(nèi)蒙古農(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

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