不同锌源及水平对幼龄艾哥兔生长性能与组织锌沉积的影响

doi:10.11686/cyxb20140134

摘要/Abstract

摘要： 为了探讨不同锌源及水平对1.5月龄艾哥兔生长性能与组织锌沉积的影响，试验选用132只1.5月龄艾哥兔，随机分成11组，每组4个重复，每个重复3只兔。对照组饲喂基础日粮，试验组在基础日粮的基础上分别以饲料级ZnSO₄、Met-Zn形式添加锌70，105，140，175和210 mg/kg。预试期7 d，正试期30 d。结果表明，在日粮中添加锌能提高1.5月龄艾哥兔生长性能，蛋氨酸锌组的平均日增重极显著高于硫酸锌组(P＜0.01)，料重比极显著低于硫酸锌组(P＜0.01)，胴体率显著低于硫酸锌组(P＜0.05)。两种锌源对幼兔采食量、器官指数、组织锌含量的影响差异性不显著(P＞0.05)。日粮锌添加水平对幼兔脾脏指数的影响差异显著(P＜0.05)，175和210 mg/kg水平饲喂兔的脾脏指数显著低于105和140 mg/kg水平。日粮锌添加形式和添加水平的交互作用对幼兔脾脏指数的影响差异显著(P＜0.05)，对其肝脏指数、肝脏锌含量、脾脏锌含量的影响差异极显著(P＜0.01)。在日粮中添加锌能改变1.5月龄艾哥兔生长性能，蛋氨酸锌改善幼兔生长性能的效果优于硫酸锌。蛋氨酸锌降低幼兔胴体率的趋势比硫酸锌大。日粮中锌的添加水平和添加形式存在交互作用，两种锌源在机体的代谢机制不同。综合考虑，建议1.5～2.5月龄肉兔锌添加量为70～140 mg/kg之间。

Abstract: To study the effects of different zinc sources and levels on growth performance and tissue zinc accumulation of 1.5 months Elco rabbit, 132 head of 1.5-month Elco rabbit were chosen and randomly divided into 11 groups, each of which were as signed to 4 replicates of 3 rabbit each. Control group was fed based on the diet. Experimental group was respectively fed feed grade ZnSO₄, Met-zinc added 70, 105, 140, 175 and 210 mg/kg on the basis of basic diet. Feeding experiment has been run two times, every formal experiment period has 30 days, advanced experiment period has 7 days. Growth performance of rabbit can be increased by zinc added in the diet. The rabbit fed with zinc methionine group significantly higher in average daily gain than in the group fed with zinc sulfate (P＜0.01),while the ratio of feed to gain had carcass a significant downtrend than in the group fed with zinc sulfate (respectively P＜0.01 and P＜0.05). The effects of the two kinds of zinc source on feed intake, organ index and tissue zinc accumulation of the young rabbits had no significant difference (P＞0.05). Diet added zinc levels have significant influence on spleen index of the young rabbit (P＜0.05). The rabbit spleen index significantly respectively below 105 and 140 mg/kg when they fed with zinc levels in 175 and 210 mg/kg. The interaction effect on spleen index of rabbit between the diet zinc form and level have significant difference (P＜0.05), while have extremely significant to liver index, the zinc content of liver or spleen (P<0.01). The zinc added in daily ration can change growth performance of 1.5-month Elco rabbit. The effect of zinc methionine is better than that of zinc sulfate and reduce carcass rate trend is bigger than zinc sulfate. Two kinds of source of zinc in the rabbit body have interaction effect and their metabolism is different. Comprehensive consideration, it is suggested that zinc supplementation is 70-140 mg/kg for 1.5-2.5-month feeding rabbit.

中图分类号:

S829.1

任战军，白彦，李发弟. 不同锌源及水平对幼龄艾哥兔生长性能与组织锌沉积的影响[J]. 草业学报, 2014, 23(1): 283-290.

REN Zhan-jun, BAI Yan, LI Fa-di. Effects of different sources and levels of zinc on growth performance and tissue zinc accumulation of the young Elco rabbit[J]. Acta Prataculturae Sinica, 2014, 23(1): 283-290.

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