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  本文選題：太行雞　切入點：消化器官　出處：《河北農(nóng)業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本試驗通過對不同周齡的太行雞體重、消化器官相對長度、消化酶活性、盲腸微生物、血液生化指標以及消化器官組織結(jié)構(gòu)的研究,探討太行雞的消化生理特點。分別在1、7、10、13、15、17、19、21、23、25、27、29、31、33、35、37、39、41、46、51、53、56、59、72周齡測定太行雞的體重、消化器官相對長度、消化酶活性、盲腸微生物及血液生化指標并觀察消化器官組織結(jié)構(gòu)等,分析其變化規(guī)律。結(jié)果表明:(1)太行雞的體重在27周齡前,隨日齡的增長而增長,之后保持在1.2kg左右;10周齡前,太行雞相對生長速度快,且相對生長速度在10周齡達到高峰為0.584。(2)太行雞各段消化道長度與體重的相對比值均隨著日齡的增加而逐漸降低,13周齡以后,降低幅度變小,其相對比值基本維持在一個較為穩(wěn)定的范圍,各段消化道長度與體重的相對比值由小到大分別為:嗉囊肌胃腺胃食管直腸盲腸十二指腸回腸空腸。(3)在太行雞十二指腸、空腸、回腸、盲腸內(nèi)均能檢測到淀粉酶、脂肪酶、胰蛋白酶,但盲腸內(nèi)的三種酶的活性均較低,盲腸中起主要作用的是纖維素酶。(4)太行雞盲腸中雙歧桿菌和乳酸桿菌的數(shù)量大于大腸桿菌,大腸桿菌數(shù)量在17周齡時逐漸減少,并維持在一個較低的水平,而太行雞盲腸乳酸菌和雙歧桿菌數(shù)量在整個試驗期內(nèi)都保持在8.4~8.8 log10cfu/g內(nèi)。(5)太行雞雛雞血清總蛋白和葡萄糖含量隨著周齡的增長而增高,以10周齡為分界點,10周齡后保持在100mg/d L左右;總膽固醇含量有隨日齡增長升高的趨勢,雛雞階段總膽固醇升高幅度最大,13周齡達到高峰,隨后在100mg/d L上下浮動;29周齡前甘油三酯水平在100mg/d L以下,31周齡之后又開始升高,達到740.57mg/d L。(6)太行雞肝臟和腸道均隨周齡的增加發(fā)育更為完善,肝臟小葉間動靜脈增多,管腔變大,各段腸道均表現(xiàn)出隨日齡增長腸絨毛明顯變長、變粗、增多,排列緊密,隱窩增多、變深,腸壁增厚,腸腺發(fā)達等多方面的變化。
[Abstract]:The body weight, relative length of digestive organs, digestive enzyme activity, cecal microorganism, blood biochemical indexes and tissue structure of digestive organs were studied in Taihang chickens of different weeks of age. To study the digestive physiological characteristics of Taihang chicken, the body weight, relative length of digestive organ, digestive enzyme activity, cecum microorganism and blood biochemical index were measured at the age of 1: 7, 7, 10, 13, 15, 17, 19, 21, 23, 27, 29, 31, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 1, 5, 5, 5, 5, 5, 5, 5, 7, 72 weeks, respectively. The results showed that the weight of Taihang chicken increased with the age of 27 weeks before the age of 27 weeks, and then kept at about 1.2 kg / 10 weeks, the relative growth rate of Taihang chicken was fast. The ratio of digestive tract length to body weight of Taihang chickens decreased gradually with the increase of the age of 10 weeks and decreased gradually after 13 weeks of age, and the relative growth rate reached a peak of 0. 584. 2 at the age of 10 weeks, the relative ratio of digestive tract length to body weight of Taihang chickens decreased gradually after 13 weeks of age. The relative ratio between digestive tract length and body weight is from small to large: crop, stomach, esophagus, rectum, ileum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum, jejunum and jejunum of Taihang Chicken. Amylase, lipase and trypsin were detected in ileum and cecum. The number of bifidobacterium and Lactobacillus in cecum of Taihang chicken is larger than that of Escherichia coli, and the number of Escherichia coli decreases gradually at the age of 17 weeks and remains at a low level. However, the number of cecal lactic acid bacteria and bifidobacterium in Taihang chicken was maintained within 8.8 log10cfu/g / log10cfu/g during the whole trial period. The serum total protein and glucose contents of Taihang chicken chicks increased with the increase of age. At the age of 10 weeks, the total cholesterol content was kept at 100 mg / d / dL after 10 weeks of age, and the total cholesterol content increased with the increase of day age, and the maximum increase of total cholesterol reached its peak at 13 weeks of age in the chicks. Then before 29 weeks of age, the level of triglyceride began to rise after 31 weeks of age, reaching 740.57 mg / d 路L ~ (6)) the liver and intestines of Taihang chickens developed more perfectly with the increase of age, and the arteriovenous and interlobular arteries and veins of the liver increased, and the lumen became larger. The intestinal villi became longer, thicker, thicker, more compact, more recess, deeper, thicker, and more developed.
【學(xué)位授予單位】：河北農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S831

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本文編號：1588406