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日糧中添加膽汁酸對肉雞生產性能、胴體品質、血清脂代謝 及腸道酶活性的影響

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掃一掃!日糧中添加膽汁酸對肉雞生產性能、胴體品質、血清脂代謝 及腸道酶活性的影響掃一掃!
瀏覽:- 發布日期:2019-08-19 14:55:04【

Effects of dietary supplemental bile acids on performance, carcass characteristics, serum lipid metabolites and intestinal enzyme activities of broiler chickens

子弹视频 The objective of the present study was to evaluate the effect of bile acids derived from poultry on the growth performance, carcass traits, serum lipid metabolites and intestinal enzyme activities in broiler chickens. Four hundred thirty-two 1-day-old Arbor Acres male broilers were randomly assigned to 4 treatments with 6 replicates of 18 chicks each for 42d. The experimental treatments received a corn-soybean basal diet containing lard and were as follows: 0 (control), 40mg, 60mg, and 80 mg bile acids/kg of diet. Dietary of inclusion bile acids significantly increased average daily gain and decreased feed to gain ratio from d 21 to d 42 (P < 0.01). However, average daily feed intake was unaffected by dietary supplementation with bile acids. The dressing percentage and the percentage of thigh muscle in the carcass were notably (P <0.01) higher for broilers fed diets supplemented with 60 and 80 mg/kg bile acids. In contrast, abdominal fat weight was reduced significantly (P < 0.01).

In 42-day-old broilers, serum triglyceride, high density lipoprotein and low density lipoprotein concentrations were unaffected (P > 0.05) by bile acids supplementation. Supplementation with 60 and 80 mg/kg significantly increased the activity of duodenum lipase and lipoprotein lipase on d 21 and d 42, as well as decreased the activity of hormone sensitive lipase on d 42. Supplementation of diets with 60 and 80 mg/kg of bile acid can effectively enhance the activity of intestinal lipase and lipoprotein lipase and improve growth performance and carcass traits of broilers.

Key words: Bile acids, performance, carcass, enzyme activity, broiler

摘  要:本研究旨在探討禽源膽汁酸對肉雞生長性能、胴體品質、血清脂代謝及腸道酶活性的影響。將432只1日齡AA雄雛隨機分為4個處理組,每組6個重復,每個重復18只,試驗期42d。實驗采用含豬油的玉米-大豆型基礎日糧,膽汁酸添加量分別為0(對照)、40 mg/kg、60 mg/kg和80 mg /kg。膽汁酸可顯著提高21—42 d日增重、降低料重比,但對采食量沒有影響。添加60 mg/kg和80 mg/kg膽汁酸可顯著改善屠宰率和腿肌率(P<0.01),腹脂率顯著降低(P<0.01)。

子弹视频 日糧膽汁酸對42日齡肉雞血清甘油三酯、高密度脂蛋白和低密度脂蛋白含量無影響(P>0.05)。添加60 mg/kg和80 mg/kg可顯著提高21 d和42 d肉雞十二指腸脂肪酶和脂蛋白酯酶活性,降低42 d激素敏感性脂肪酶活性。因此,日糧中添加膽汁酸60 mg/kg和80 mg/kg可有效提高肉雞腸道脂肪酶和脂蛋白酯酶活性,改善肉雞生長性能和胴體品質。

關鍵詞:膽汁酸;生長性能;胴體品質;酶活性;肉雞

全文要點:

子弹视频 1、隨著膽汁酸水平增加,日增重極顯著提高(21-42 d日增重提高2.5 g/只/天,全程提高1.6 g/只/天),料肉比顯著性降低0.05左右;

子弹视频 2、添加80 mg/kg膽汁酸可顯著改善胴體品質:胴體率提高2.8%,半凈膛率提高3.2%,全凈膛率提高3.3%,腿肌率提高2.5%,腹脂率降低0.31%;

子弹视频 3、添加80 mg/kg膽汁酸可顯著影響肉雞42 d十二指腸酶活性:激素敏感脂肪酶活性降低44.14 U/g、脂蛋白酯酶活性提高7.79 U/g、脂肪酶活性提高8.18 U/g,顯著提高了肉雞對油脂的利用率。

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