This experiment was conducted to study the effects of dietary zinc level on growth performance, nutrient digestibility, nitrogen metabolism and fur quality of blue foxes during the growing-furring period, and to find the appropriate dietary zinc level for the blue foxes. Ninety 16-week-old healthy blue foxes with the average body weight of (5.80±0.60) kg were randomly divided into 5 groups with 18 foxes per group, each group had 9 male foxes and 9 female foxes. The blue foxes were fed the experimental diets with dietary zinc levels of 41.25 (group Ⅰ), 60.00 (group Ⅱ), 80.00 (group Ⅲ), 100.00 (group Ⅳ) and 120.00 mg/kg (group Ⅴ), respectively. The pretest period lasted for 7 days and the test period lasted for 60 days. The results showed as follows: 1) the final weight of male foxes in group Ⅲ was significantly higher than that in groups Ⅰ and Ⅱ (P<0.05); there was no significant difference in the average daily gain of male foxes and female foxes among all groups (P>0.05). 2) There was no significant difference in dry matter output, dry matter digestibility and protein digestibility of male foxes and female foxes among all groups (P>0.05); the fat digestibility of male foxes in group Ⅴ was significantly higher than that in group Ⅰ (P<0.05). 3) There was no significant difference in nitrogen intake, fecal nitrogen, urinary nitrogen, nitrogen deposition, net protein utilization and biological value of protein of male foxes among all groups (P>0.05). The fecal nitrogen of female foxes in group Ⅰ was significantly higher than that in group Ⅲ (P<0.05); the nitrogen deposition and net protein utilization of female foxes in groups Ⅲ, Ⅳ and Ⅴ were significantly higher than those in group Ⅰ (P<0.01); the biological value of protein of female foxes in group Ⅳ was significantly higher than that in group Ⅰ (P<0.05). 4) There was no significant difference in body length, guard fur length, under fur length and dry fur length of male foxes among all groups (P>0.05). The guard fur length of female foxes in group Ⅴ was significantly higher than that in other groups (P<0.01); the under fur length of female foxes in group Ⅴ was significantly higher than that in groups Ⅰ and Ⅲ (P<0.05). In conclusion, the appropriate dietary zinc level for blue foxes during the growing-furring period is 80 to 120 mg/kg, which can be possible to meet the requirement for blue foxes and have better growth performance and fur quality.
GUO Qiang
,
ZHANG Tietao
,
LIU Zhi
,
XING Siyuan
,
YANG Fuhe
,
XING Xiumei
. Effects of Dietary Zinc Level on Growth Performance, Nutrient Digestibility, Nitrogen Metabolism and Fur Quality of Blue Foxes during Growing-Furring Period[J]. Chinese Journal of Animal Nutrition, 2014
, 26(5)
: 1414
-1420
.
DOI: 10.3969/j.issn.1006-267x.2014.05.036
[1] 吴学壮,张铁涛,杨颖,等.饲粮锌添加水平对繁殖期雄性水貂繁殖性能、营养物质消化率及氮代谢的影响[J].动物营养学报,2013,25(8):1817-1824.
[2] 任二军,蒋清奎,刘进军,等.不同锌源与锌水平日粮对生长期雌性水貂营养物质消化率及氮代谢的研究[J].中国畜牧兽医,2011,38(6):22-25.
[3] 何玉华,秦贵信.不同水平蛋氨酸锌对育成期蓝狐生产性能及营养物质消化率的影响[J].中国兽医杂志,2013,49(5):45-47.
[4] 徐振华,李福昌,秦应和.日粮锌水平对生长肉兔生产性能、血清肝脏抗氧化酶活性和金属硫蛋白-1基因表达的影响[J].动物营养学报,2008,20(3):337-342.
[5] NRC.Nutrient requirements of mink and foxes[S].Washington,D.C.:National Academy Press,1982.
[6] 崔虎,张铁涛,张志强,等.饲粮蛋白质水平对冬毛期蓝狐生长性能、营养物质消化代谢及血清生化指标的影响[J].动物营养学报,2011,23(12):2217-2224.
[7] 云春凤,耿业业,张铁涛,等.饲粮蛋白质和脂肪来源对育成前期蓝狐营养物质消化率和氮代谢的影响[J].动物营养学报,2012,24(9):1721-1730.
[8] 刘风华,孙伟丽,钟伟,等.饲粮蛋白质水平对银黑狐生长性能及氮代谢的影响[J].动物营养学报,2011,23(11):2024-2030.
[9] GENG Y Y,YANG F H,XING X M,et al.Effects of dietary fat levels on nutrient digestibility and production performance of growing-furring blue foxes (Alopex lagopus)[J].Journal of Animal Physiology and Animal Nutrition,2012(4):610-617.
[10] 郭强,张铁涛,刘志,等.饲粮锌水平对育成期蓝狐生长性能、营养物质消化率及氮代谢的影响[J].动物营养学报,2013,25(10):2497-2503.
[11] 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.
[12] 白彦.不同锌源及水平对商品肉兔生长性能及组织锌沉积的影响[D].硕士学位论文.杨凌:西北农林科技大学,2010.
[13] AYYAT M S.Growth performance and carcass traits as affected by breed and dietary supplementation with different zinc levels, under egyptian conditions[J].World Rabbits Science,2008,8:83-88.
[14] 崔华伟.硫酸锌对仔猪摄食的影响及其作用机理的探讨[D].硕士学位论文.杭州:浙江大学,2009.
[15] 王惠康,王坤坤,周金伟,等.锌对仔猪采食量、消化酶活性及抗氧化性能的影响研究[J].浙江畜牧兽医,2012,37(1):4-7.
[16] 井明艳.锌影响大鼠生长发育及其与降钙素基因相关肽调控摄食的机理研究[D].博士学位论文.杭州:浙江大学,2007.
[17] 杨玫.饲粮不同蛋白及锌水平对早期断奶仔猪生产性能、肠道微生物多样性及其代谢产物的影响[D].硕士学位论文.雅安:四川农业大学,2008.
[18] 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(4):17-20.
[19] 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.
[20] 李明文,陶大勇.铜、锌元素对卡拉库尔羊毛毛质的影响[J].中国畜牧兽医文摘,2012,28(11):47-48.
