The present study assessed the influences of chelating zinc on growth performance, nutrient apparent digestibility, serum indices and fur quality of raccoon dogs during winter-furring period.A total of 120 healthy winter-furring raccoon dogs were randomly selected and divided into 4 groups, and each group contained 30 animals with half male and half female.Three groups were assigned as the experimental groups (groups Ⅰ, Ⅱ and Ⅲ) and the fourth group was used as control group (group Ⅳ).Methionine chelated zinc (Met-Zn) and ZnSO4·H2O were used as chelating and inorganic zinc sources, respectively.The raccoon dogs in groups Ⅰ, Ⅱ, Ⅲ and Ⅳ were fed basal diet+50 mg/kg Met-Zn+20 mg/kg ZnSO4·H2O, basal diet+60 mg/kg Met-Zn+10 mg/kg ZnSO4·H2O, basal diet+70 mg/kg Met-Zn, basal diet+70 mg/kg ZnSO4·H2O (the data were zinc content, and the zinc content in the basal diet was 42.89 mg/kg), respectively.The experiment lasted for 55 days.The results showed as follows: 1) the final body weight and feed conversion rate in the three experimental groups were significantly higher than those in the control group (P<0.05 or P<0.01), and the average daily gain in groups Ⅱ and Ⅲ was significantly higher than that in the control group (P<0.05).2) No significant difference was observed in the apparent digestibility of crude protein between all experimental groups and the control group (P>0.05).However, the apparent digestibility of ether extract was significantly higher in experimental groups than that in the control group (P<0.05).3) Serum znic content and alkaline phosphatase activity in the control group were significantly lower than those in all experimental groups (P<0.01).4) Experimental groups tended to have longer guard hair, under fur and the diameter of under fur in neck, backside and buttocks compared with the control group.However, the diameter of guard hair was decreased in experimental groups compared with the control group, and the diameter of guard hair in neck, backside and buttocks in group Ⅲ was significantly shorter than that in the control group.(P<0.05).5) The weight of skin per unit area in three experimental groups was significantly higher than that in the control group (P<0.01 or P<0.01).These results suggest that adding chelating zinc to the diet can improve the body weight, average daily gain, feed conversion rate, ether extract apparent digestibility and fur quality of raccoon dogs although, the guard hair diameter tends to become thinner.The dosage of additive chelating zinc at 70 mg/kg may lead to slight curling of guard hair.Therefore, we recommend to add chelating zinc at the dosage of 60 mg/kg (total content of zinc in the diet is 102.89 mg/kg) in practice.
ZHENG Yinwei, LIU Zhiping, HUANG Hui, WANG Yufeng
. Influences of Chelating Zinc on Growth Performance, Nutrient Apparent Digestibility, Serum Indices and Fur Quality of Raccoon Dogs during Winter-Furring Period[J]. Chinese Journal of Animal Nutrition, 2015
, 27(10)
: 3102
-3109
.
DOI: 10.3969/j.issn.1006-267x.2015.10.015
[1] 张宇,魏海军,李光玉,等.不同锌源对蓝狐毛皮质量、血清超氧化物歧化酶和乳酸脱氢酶水平的影响[J].特产研究,2008,30(4):17-20.
[2] 白玉妍,张浩,叶纯子,等.蛋氨酸铜、蛋氨酸锌对乌苏里貉冬毛生长期体重及毛皮质量的影响[J].黑龙江畜牧兽医,2009(7):113-114.
[3] 任二军,蒋清奎,杨福合,等.日粮不同锌添加水平对育成期雄性水貂消化代谢、生长性能和血清生化指标的影响[J].中国畜牧兽医,2012,39(6):104-108.
[4] 刘进军,刘洁,任二军,等.日粮锌源与添加水平对冬毛期母貂体重和养分消化代谢的影响[J].特产研究,2013(3):13-17.
[5] 刘进军,刘洁,任二军,等.饲粮锌源与水平对冬毛期公貂体重、营养物质消化率及氮代谢的影响[J].动物营养学报,2013,25(9):2168-2173.
[6] 庞全海,张莉,张春有,等.微量元素锌在动物健康及营养中的研究进展[J].动物医学进展,2002,23(2):41-43.
[7] 冯江,马文强,李奎,等.不同有机锌在动物生产中的研究[J].饲料研究,2008(4):30-33.
[8] 徐逸男,杜东升,杨爽.蛋氨酸锌对乌苏里貉生长性能及皮张长度的影响[J].饲料工业,2013,34(17):39-42.
[9] 郭强.饲粮锌水平和锌源对蓝狐生产性能的影响[D].硕士学位论文.北京:中国农业科学院,2014.
[10] 耿文静.不同锌水平对银狐生产性能和血液生化指标的影响[D].硕士学位论文.北京:中国农业科学院,2010.
[11] JOHNSON B,FAKLER T M.Trace minerals in swine and poultry nutrition,presented at the Africa feed ufacturers association forum in Sun City[J].South Africa,1998(5).
[12] 何玉华,秦贵信.不同水平蛋氨酸锌对冬毛期蓝狐营养物质消化率及微量元素排出的影响[J].饲料工业,2013,34(19):32-34.
[13] VAN HEUGTEN E,SPEARS J W,KEGLEY E B,et al.Effects of organic forms of zinc on growth performance,tissue zinc distribution,and immune response of weanling pigs[J].Journal of Animal Science,2003,81(8):2063-2071.
[14] DUKE C E.Alimentary canal:secretion and digestion,special digestive functions,and absorption[M].4th ed.New York:Springer Verlag,1986:289-302.
[15] 张宇,魏海军,李光玉,等.不同锌源对蓝狐生长及肝脏中锌铁含量的影响[J].经济动物学报,2008,12(4):200-203,208.
[16] 王淑明,鞠贵春,张志明,等.不同锌源及锌水平对水貂血清生化指标和脏器中微量元素含量的影响[J].西北农林科技大学学报:自然科学版,2014,42(9):17-22,26.
[17] HILL G M,KU P K,MILLER E R,et al.A copper deficiency in neonatal pigs induced by a high zinc maternal diet[J].Journal of Nutrition,1983,113(4):867-872.
[18] 单安山.饲粮纤维和不同化合锌对雏鸡生长性能、血液生化指标和组织中锌浓度的影响[J].畜牧兽医学报,1993,24(1):29-35.
[19] 王立新,王治华,卢文超,等.不同锌形式对仔猪生产性能及血液生化指标的影响[J].畜牧与兽医,2003,35(11):21-22.
[20] 闫海亮.日粮蛋氨酸锌对獭兔生产性能、生化指标的影响[D].硕士学位论文.长春:吉林大学,2007.
