摘要
本试验旨在研究维生素B2对5~16周龄五龙鹅生长性能、血清激素含量和肠道组织结构的影响,以确定鹅饲粮中维生素B2的适宜添加水平。试验选用29日龄五龙鹅360只,随机分为6个组,每组6个重复,每个重复10只。Ⅰ组为对照组,饲喂基础饲粮（维生素B2含量为2.47 mg/kg）,Ⅱ~Ⅵ组分别饲喂在基础饲粮中添加2.5、5.0、10.0、20.0、40.0 mg/kg维生素B2的试验饲粮。试验期12周。结果表明：1）采用不相关比较法进行分析,饲粮维生素B2添加水平为5.69 mg/kg时平均日增重（ADG）最大,饲粮维生素B2添加水平为5.64 mg/kg时料重比（F/G）最低。2）Ⅲ组血清生长激素（GH）、游离三碘甲腺原氨酸（FT3）、游离甲状腺素（FT4）、胰岛素（INS）含量显著高于Ⅰ组（P〈0.05）。3）Ⅲ组肠道绒毛高度、隐窝深度、绒毛高度/隐窝深度（V/C）显著或极显著高于Ⅰ组（P〈0.05或P〈0.01）。4）ADG与FT4含量呈显著正相关（P〈0.05）,F/G与GH、FT3、FT4和INS含量呈显著或极显著负相关（P〈0.05或P〈0.01）。5）ADG与绒毛高度呈显著正相关（P〈0.05）,F/G与绒毛高度、隐窝深度呈显著负相关（ P〈0.05）。由此可见,饲粮添加5.0 mg/kg维生素B2对5-16周龄五龙鹅的体重、ADG、F/G和血清GH、FT3、FT4、INS含量及肠道绒毛高度、隐窝深度、V/C有显著影响,以生长性能为衡量标准,建议玉米-豆粕型饲粮中维生素B2适宜添加水平为5.64~5.69 mg/kg。
This experiment was conducted to study the effects of vitamin B2 on growth performance, serum hormone contents and intestinal tissue structure of Wulong geese aged from 5 to 16 weeks, and to find the ap-propriate supplemental level of vitamin B2 in diets of geese. A total of 360 Wulong geese （29-day-old） were randomly divided into 6 groups with 6 replicates per group and 10 geese per replicate. Geese in groupⅠ（ con-trol group） were fed a basal diet, and geese in groupsⅡtoⅥwere fed the basal diet supplemented with 2. 5, 5. 0, 10. 0, 20. 0 and 40. 0 mg/kg vitamin B2, respectively. The experiment lasted for 12 weeks. The results showed as follows：1） using unrelated comparative analysis method, when the dietary vitamin B2 supplemental level was 5. 96 mg/kg, the average daily gain （ADG） reached the highest; when the dietary vitamin B2 sup-plemental level was 5. 64 mg/kg, the ratio of feed to gain （F/G） reached the lowest. 2） The contents of growth hormone （ GH） , free triiodothyronine （ FT3 ） , free thyroxine （ FT4 ） and insulin （ INS） in serum in group Ⅲ were significantly higher than those in group Ⅰ （ P〈0 . 05 ） . 3 ） The villus height, crypt depth and the ratio of villus height to crypt depth （V/C） were significantly higher than those in group Ⅰ （P〈0. 05 or P〈0. 01）. 4） ADG had significant positive correlation with FT4 content （P ＆lt;0. 05）, F/G had significant negative correlations with the contents of GH, FT3, FT4 and INS （P〈0. 05 or P〈0. 01）. 5） ADG had sig-nificant positive correlation with villus height （ P〈0 . 05 ） , F/G had significant negative correlations with villus height and crypt depth （P〈0. 05）. In conclusion, adding 5. 0 mg/kg vitamin B2 can significantly affect the final body weight, ADG, F/G, the contents of serum GH, FT3 , FT4 and INS, and intestinal villus height, crypt depth and V/C. According to the growth performance, it suggests that dietary vitamin B2 optimal supple-mental level is 5. 64 to 5. 69 mg/kg.
出处
《动物营养学报》
CAS
CSCD
北大核心
2014年第3期637-645,共9页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家水禽产业技术体系专项基金(CARS-43-11)
