發(fā)布時間：2018-04-29 10:30

  本文選題：肉仔雞 + 乙酸鋅��； 參考：《東北農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：鋅是動物營養(yǎng)必需的微量元素,不僅參與體內(nèi)三大營養(yǎng)物質(zhì)等的代謝,還與多種酶的活性和激素分泌有關(guān)聯(lián)。因此鋅對動物的生長代謝、骨骼發(fā)育、免疫等都有重要的作用。不同形式的鋅生物學(xué)利用率不同。但是,關(guān)于乙酸鋅在肉雞方面的研究甚少。本試驗旨在探討飼糧中不同添加水平的乙酸鋅對肉仔雞生長性能、骨骼性狀和肉品質(zhì)等指標(biāo)的影響,為生產(chǎn)中合理使用乙酸鋅提供科學(xué)的試驗依據(jù)。試驗選取1日齡愛拔益加(AA)肉仔雞220羽,按體重?zé)o差異原則隨機分為一個對照組(A)和三個試驗組(B、C、D),每組5個重復(fù),每個重復(fù)11羽�；A(chǔ)日糧采用玉米-豆粕型日糧(不額外加鋅),對照組(A)在基礎(chǔ)日糧中添加鋅40 mg/kg(Zn SO4·H2O形式),試驗組(B、C、D)分別在基礎(chǔ)日糧中添加80 mg/kg、100 mg/kg、150 mg/kg三個水平的乙酸鋅。試驗期42d。試驗結(jié)果表明:(1)與對照組相比,B組肉仔雞21日齡體重、日增重顯著高于其它三組(P0.05),料重比顯著降低(P0.05)。(2)與對照組相比,42日齡時,B組肉仔雞對代謝能、粗蛋白及鈣的利用率顯著升高(P0.05),21日齡時D組肉仔雞對代謝能、P以及42日齡時D組肉仔雞對Ca、P的利用率均顯著降低(P0.05),42日齡時C組肉仔雞對Ca的利用率顯著降低(P0.05)。(3)21日齡肉仔雞血清中總蛋白(TP)的含量B組顯著高于其它三組(P0.05),42日齡肉仔雞血清中總蛋白(TP)和低密度脂蛋白(LDL)的含量C、D組顯著降低(P0.05)。(4)與對照組相比,B組肉仔雞21日齡鮮脛骨重及總灰分重均顯著升高(P0.05),B、C組肉仔雞21日齡脛骨烘干重及B組肉仔雞42日齡脛骨烘干重顯著升高(P0.05),D組肉仔雞21日齡脛骨Ca、P含量及42日齡脛骨Ca含量均顯著降低(P0.05),B組肉仔雞42日齡脛骨Ca含量顯著升高(P0.05),21、42日齡時,肉仔雞胰腺鋅的含量B組均顯著高于A組(P0.05),C組顯著高于A、B兩組(P0.05),D組顯著高于A、B、C組(P0.05)。(5)與對照組相比,各試驗組42日齡肉仔雞腿肌粗脂肪含量顯著升高(P0.05),胸肌粗蛋白和粗脂肪含量B、D組顯著升高(P0.05);各試驗組肉仔雞胸肌L*值、胸肌和腿肌p H均顯著升高(P0.05),腿肌L*值B、C兩組顯著升高(P0.05),胸肌a*值和腿肌b*值D組顯著升高(P0.05);各試驗組間胸肌和腿肌p H D組顯著高于B、C兩組(P0.05)。由以上結(jié)果可以看出,飼糧中添加80 mg/kg乙酸鋅促進(jìn)了肉仔雞的生長發(fā)育和養(yǎng)分利用率,對血清中蛋白、脂肪含量有顯著影響,提高了肉仔雞脛骨長和重量,促進(jìn)脛骨的鈣磷沉積,同時顯著提高肉仔雞肌肉粗脂肪含量和胸肌粗蛋白含量,提高肌肉亮度值以及肌肉p H,改善肉品質(zhì)。
[Abstract]:Zinc is an essential trace element in animal nutrition, which is not only involved in the metabolism of three nutrients, but also related to the activity of various enzymes and hormone secretion. Zinc plays an important role in growth, metabolism, bone development and immunity of animals. The bioavailability of zinc in different forms is different. However, there is little research on zinc acetate in broilers. The purpose of this study was to investigate the effects of zinc acetate on growth performance, bone traits and meat quality of broilers at different dietary levels, and to provide a scientific experimental basis for the rational use of zinc acetate in production. Two hundred and twenty 1-day-old Ebba + AAA broilers were randomly divided into two groups according to the principle of no difference in body weight: a control group (A) and three experimental groups (n = 5) with 11 replicas per replica. The basal diet was fed with corn-soybean meal diet (no additional zinc addition, control group), zinc 40 mg/kg(Zn SO4 H 2O was added to the basal diet, and the experimental group fed the basal diet with 80 mg / kg 100 mg / kg of zinc acetate at 150 mg/kg level, and the control group was fed with 40 mg/kg(Zn SO4 H 2O and 80 mg 路kg ~ (-1) 路L ~ (-1) 路L ~ (-1) 路L ~ (-1) of zinc acetate in the basal diet. The trial period was 42 days. The results showed that compared with the control group, the weight gain and daily gain of broilers in group B were significantly higher than those in the other three groups, and the ratio of feed to weight was significantly lower than that of the control group (P 0.05).) compared with the control group, the weight gain of broilers in group B was significantly higher than that in group B at 42 days of age, and the metabolic energy of broilers in group B was significantly lower than that in group B at 42 days of age. Utilization efficiency of crude protein and calcium increased significantly in group D broilers at 21 days of age and in group D broilers at 42 days of age. The utilization rate of Ca in group C broilers at 42 days of age decreased significantly (P 0.055.32). The content of total protein (TPTP) in serum of broilers in group B was significantly higher than that in the other three groups (P 0.05) and LDLL in serum of 42-day-old broilers. The contents of TTP and LDLL in serum of group C ~ (2 +) were significantly lower than those of control group (P < 0.05). Tibia weight and total ash weight increased significantly in group P0.05 and group B, significantly increased tibia dry weight at 21 days of age and 42 days old in group B broilers. The contents of CaOP and Ca in 21-day-old tibia and 42-day-old tibia of group D broilers were significantly decreased. The tibia Ca content in group B was significantly higher than that in group B at 21 ~ 42 days of age, and the content of Ca in tibia of group B was significantly higher than that of group B. The content of zinc in the pancreas of broilers in group B was significantly higher than that in group A (P 0.05), and that in group C was significantly higher than that in group A and B (group D) was significantly higher than that in group A (P 0.05), and that in group C was significantly higher than that in group A (P 0.05). The contents of crude fat in leg muscle of 42-day-old broiler were significantly higher than those in control group, and the contents of crude protein and crude fat in pectoralis muscle were significantly increased in group B and D, and the L* value of pectoralis muscle in broilers of each test group was significantly higher than that in group D. The pH of pectoralis and leg muscles increased significantly, the L * values of leg muscles increased significantly in two groups (P < 0.05), the values of pectoralis and leg muscles in group D were significantly higher than those in group D, and the p H D of pectoralis and leg muscles were significantly higher than those in group B and C (P 0.05). It can be seen from the above results that the dietary supplementation of 80 mg/kg zinc acetate promoted the growth, development and nutrient utilization of broilers, significantly affected the contents of protein and fat in serum, and increased the tibia length and weight of broilers. At the same time, the content of crude fat and protein of pectoralis muscle, the brightness value of muscle and muscle pH of broilers were increased, and the meat quality was improved.
【學(xué)位授予單位】：東北農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S831.5

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本文編號：1819560