饲粮维生素B_6添加水平对生长獭兔生长性能及维生素B_6代谢的影响  

Effects of Dietary Vitamin B_6 Supplemental Level on Growth Performance and Vitamin B_6 Metabolism of Growing Rex Rabbits

作　　者：刘公言 赵楠[1] 朱岩丽[1] 刘磊[1] 梁才芝[1] 李福昌[1] 

机构地区：[1]山东农业大学动物科技学院,泰安271018

出　　处：《动物营养学报》2015年第7期2292-2299,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：现代农业产业技术体系建设专项(CARS-44-B-1);国家公益性行业(农业)科研专项(2000903006);山东省农业重大应用技术创新课题(肉;獭兔高效高产技术研究;集成与推广)

摘　　要：本试验旨在研究饲粮维生素B6添加水平对生长獭兔生长性能、皮张质量、肌肉品质以及维生素B6代谢的影响。试验选用200只体重相近、健康状况良好的3月龄獭兔,随机分成5组,每组40个重复,每个重复1只,分别饲喂在基础饲粮基础上添加0（对照）、5、10、20和40mg/kg维生素B6的试验饲粮。预试期7d,正试期53d。结果表明：饲粮维生素B6添加水平对平均日增重有显著影响（P=0.017 8）,对平均日采食量有极显著影响（P=0.000 4）,二者均在维生素B6添加水平为20 mg/kg时达到最高值。随着维生素B6添加水平的升高,料重比（F/G）有先降低后升高趋势,并在维生素B6添加水平为20 mg/kg时达到最低值。饲粮维生素B6添加水平对獭兔皮张重量有显著影响（P=0.040 0）,对皮张面积有极显著影响（P=0.001 6）,对皮张厚度和被毛长度无显著影响（P=0.478 0和P=0.756 2）。20 mg/kg添加组的皮张重量、皮张面积显著或极显著高于对照组（P〈0.05或P〈0.01）。饲粮维生素B6添加水平显著或极显著影响肌肉pH（P=0.039 4）、红度值（a^＊）（P=0.013 1）、黄度值（b＊）（P=0.023 9）、亮度值（L^＊）（P=0.002 5）,其中20 mg/kg添加组的L^＊极显著低于对照组（P〈0.01）,b＊显著低于对照组（P〈0.05）,a^＊显著高于对照组（P〈0.05）。饲粮维生素B6添加水平对肌肉失水率和剪切力无显著影响（P=0.216 1和P=0.825 9）。饲粮维生素B6添加水平对肌肉中维生素B6含量有显著影响（P=0.028 3）,对肝脏和尿液中维生素B6含量有极显著影响（P=0.000 1和P=0.008 1）,对血清中维生素B6含量无显著影响（P=0.112 9）。20mg/kg添加组肌肉和肝脏中维生素B6含量显著或极显著高于对照组（P〈0.05或P〈0.01）。综合本试验测定指标,3-5月龄生长獭兔饲粮适宜的维生素B6添加水平为20mg/kg。This experiment was conducted to investigate the effects of dietary vitamin B6 supplemental level on growth performance, fur quality, muscle quality and vitamin B6 metabolism of growing Rex rabbits. Two hundred 3-month-old healthy Rex rabbits with similar body weight were randomly divided into 5 groups with 40 replicates in each group and each replicate contained 1 rabbit. Rabbits in 5 groups were fed experimental diets containing 0 （control）, 5, 10, 20 and 40 mg/kg vitamin B6, respectively. The trial lasted for 7 days for adaptation, and 53 days for test. The results showed that dietary vitamin B6 supplemental level had significant influence on average daily gain （ADG） and average daily feed intake （ADFI） （P= 0.017 8 and P=0.000 4, respectively）, and the highest values of ADG and ADFI were found when vitamin B6 supplemental level was 20 mg/kg. With the vitamin B6 supplemental level increasing, the feed/gain （F/G） was firstly decreased and then increased, and it had the lowest value when vitamin B6 supplemental level was 20 mg/kg. Dietary vitamin B6 supplemental level had significant influences on fur weight and fur area （P= 0.040 0 and P= 0.001 6, respectively）, but had no significant influences on fur thickness and wool length （P=0.478 0 and P=0.756 2, respectively）. The fur weight and fur area in 20 mg/kg group were significantly higher than those in control group （P〈0.05 or P〈0.01）. Dietary vitamin B6 supplemental level had significant influences on pH （P= 0.039 4） , red value （ a^ ＊ ） （ P = 0.013 1 ） , yellow value （ b ＊ ） （ P = 0.023 9） and light value （ L^＊ ） of muscle （P=0.002 5）. The muscle b^＊ and L^＊ were significantly lower than those in control group （P〈0.05 or P〈 0.01 ）, while the muscle a^ ＊ was significantly higher than that in control group （P〈0.05）. Dietary vitamin B6 supplemental level had no significant influences on muscle water loss rate and shear force （P= 0.216 1 and P= 0.825 9, respectively）. Die

关 键 词：维生素B6 獭兔 生长性能 皮张质量 肌肉品质 

分 类 号：S816[农业科学—饲料科学]