This experiment was conducted to investigate the effects of dietary choline level on growth performance, serum biochemical indices, caecum fermentation and fur quality of 3 to 5-month-old 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 1 rabbit in each replicate. Rabbits in 5 groups were fed experimental diets which containing 0.08% (group A), 0.09% (group B), 0.10% (group C), 0.11% (group D) and 0.12% choline (group E), respectively. The choline levels in experimental diets were measured values. The experiment lasted for 7 days for adaptation, and 60 days for test. The results showed as follows: dietary choline level had no significant effect on average daily feed intake (ADFI) (P>0.05), but had significant effects on average daily gain (ADG) (P<0.000 1) and feed/gain (F/G) (P=0.000 2). The highest ADG and the lowest F/G were all found in group D, and there were significant differences in them between groups D and A (P<0.01). Dietary choline level had significant effects on the contents of serum urea nitrogen (P=0.048 2)and total protein (P=0.011 7), but had no significant effects on the activity of alanine aminotransferase and the contents of triglycerides, total cholesterol, high-density lipoprotein cholesterol and low-density lipoprotein cholesterol (P>0.05). Compared with the group A, the urea nitrogen content in groups B, C and D was significantly decreased (P<0.05), and the total protein content in groups C, D and E was significantly decreased (P<0.05). Dietary choline level had significant effects on cecal digesta pH (P<0.000 1), total volatile fatty acid concentration (P<0.000 1), acetic acid proportion (P=0.003 2), acetic acid/(propionic acid+butyric acid) (P=0.004 5) and propionic acid proportion (P=0.030 7), but had no significant effects on butyric acid proportion and ammonia nitrogen concentration (P>0.05). Compared with the group A, the pH in groups C, D and E was significantly decreased (P<0.01), the total volatile fatty acid concentration in group D was significantly increased (P<0.01), the acetic acid proportion in groups D and E was significantly decreased (P<0.01), the propionic acid proportion in groups C, D and E was significantly increased (P<0.05), and the acetic acid/(propionic acid+butyric acid) in groups C, D and E was significantly increased (P<0.01). Dietary choline level had significant effects on fur area (P<0.000 1) and fur weight (P=0.015 6), but had no significant effects on fur thickness and wool length (P>0.05). The fur area in groups D and E was significantly higher than that in groups A, B and C (P<0.01), and the fur weight in group D was significantly higher than that in other groups (P<0.05). Considering all indices of this experiment,the appropriate dietary choline level is 0.11% for 3 to 5-month-old Rex rabbits.
ZHANG Caixia
,
LI Fuchang
,
LI Bing
,
FU Zhaohui
,
LI Wanjia
,
ZHU Xiaoqiang
. Effects of Dietary Choline Level on Growth Performance, Serum Biochemical Indices, Caecum Fermentation and Fur Quality of 3 to 5-Month-Old Rex Rabbits[J]. Chinese Journal of Animal Nutrition, 2014
, 26(4)
: 989
-995
.
DOI: 10.3969/j.issn.1006-267x.2014.04.018
[1] 袁毅军.氯化胆碱在家兔配合饲料中的应用[J].中国养兔杂志,2002(2):38-39.
[2] 赵国成.氯化胆碱对生长毛兔增重的影响[J].中国畜牧杂志,1996(6):43.
[3] 林映才,刘炎和,余德谦,等.饲粮胆碱水平对生长猪生产性能和血液理化指标的影响[J].饲料博览,2001(9):4-6.
[4] SOUTHERN L L,BROWN D R,WERNER D D,et al.Excess supplemental choline for swine[J].Journal of Animal Science,1986,62(4):992-996.
[5] 冷向军,李小勤.水产动物的胆碱营养[J].饲料研究,2005(2):44-46.
[6] NRC.Nutrient requirements of rabbits[S].2nd ed.Washington,D.C.:National Academy Press,1977.
[7] DE BLAS C,MATEOS G G.The nutrition of the rabbit[M].New York:CABI Publishing,1998:297-308.
[8] 孙公文,王作洲.胆碱的生物功能及科学禁忌[J].中国动物保健,2008,111(5):79-82.
[9] 陈东东,王春维.过瘤胃氯化胆碱对山羊生长性能和血液生化指标的影响[J].饲料工业,2008,29(21):31-33.
[10] 吴东,高振魁,李吕木,等.肉鸭日粮中添加氯化胆碱对其生长性能的影响[J].饲料与营养,2001(3):20.
[11] 吴忠良,曹义宝.氯化胆碱对生长毛兔的增重效果[J].中国养兔杂志,1998(1):8-9.
[12] 唐登华.饲粮中氯化胆碱添加量对笼养肉种鸡生产性能的影响[J].辽宁畜牧兽医,2000(5):14-15.
[13] MALMOLF K.Amino acid in farm animal nutrition metabolism,partition and consequences of imbalance[J].Swedish Journal of Agricultural Research,1988,18(4):191-193.
[14] 王宏,霍启光.动物营养中胆碱同其他甲基供体间的关系[J].动物营养学报,1999,11(2):1-5.
[15] 胡宝利.胆碱及其在养殖业上的应用[J].黄牛杂志,2000,26(1):52-55.
[16] 许丽.鸡营养中的胆碱及其效用评价.博士学位论文.哈尔滨:东北农业大学,2002:1-137.
[17] 王宗伟,牟晓玲,杨国伟,等.日粮营养素水平对东北肉鹅生长性能及血液生化指标的影响(1-28日龄)[J].核农学报,2009,23(5):894-896.
[18] 朱瑞俊,李小勤,谢骏,等.饲料中添加氯化胆碱对草鱼成鱼生长、脂肪沉积和脂肪代谢酶活性的影响[J].中国水产科学,2010,17(3):527-535.
[19] JAN D F,LIEN T F.The effect on the lipid metabolism of tsaiya ducks when high levels of choline or methionine are added to the ducks' diet[J].Asian-Australasian Journal of Animal Science,1999,12(7):1090-1095.
[20] 文光华.家兔营养生理学[M].北京:农业出版社,1984:11-33.
[21] CHAMPER K A,MAURICE D V.Respose of early weaned rabbits to souse and level of dietary fiber[J].Journal of Animal Science,1983,56(5):1105-1114.
[22] 张自强,刘玉梅,考桂兰,等.肉兔日粮中添加氯化胆碱饲喂效果研究[J].畜牧与饲料科学,2004,25(4):12.
[23] 郭小权.畜禽胆碱缺乏症的饲料补充[J].农民致富之友,2001(2):27.
