基因型和定量限饲对家兔断奶后生长性状的影响

U. C. Isaac, E. U. Kalu, Jennifer Onyinyechi Oriaku, M. Ogwuegbu, J. Ezea, O. M. Obike
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摘要

本试验旨在研究4种基因型和4种不同定量饲喂方式对48只无性断奶兔断奶后平均采食量(AFI)、体重(BW)、增重(WG)和饲料系数(FCR)的影响。断奶时,每种基因型的3只兔,即纯种青鼠和新西兰白(CH x CH, NZW x NZW)及其杂交品种(CH x NZW, NZW x CH),随机分为4种喂养方案:任意浓缩料+任意饲料(A)、任意浓缩料+ 30%限制性饲料(B)、30%限制性浓缩料+任意饲料(C)、30%限制性浓缩料+ 30%限制性饲料(D)。采用适合4x4析因试验的完全随机设计,进行双向方差分析。试验为期5周,即断奶后7 ~ 11周。断奶后7周CH × CH与C饲喂方式相互作用的AFI值(366.50±1.50 g), 8周NZW × NZW与B饲喂方式相互作用的AFI值(324.00±1)。断奶后10周(336.50±0.00 g)与其他组比较,差异显著(P < 0.05)。最低的重要AFI值(P < 0.05)所有年龄段和货代值(3.46±0.33)在9周post-weaning获得NZW x NZW,而最高的BW值在9 - 11周post-weaning获得CH x CH。最低的重要AFI值(P < 0.05)记录在7 - 11周post-weaning B喂养政权,以及最高的BW和WG值在8 - 11和11周post-weaning喂养政权,分别。断奶后7周,C饲喂组的显著体重值(781.25±7.83)最高。综上所述,CH × CH与C饲喂方式以及NZW × NZW与B饲喂方式的相互作用可以显著降低兔的总采食量,从而提高兔的生产利润。
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Effects of Genotype and Quantitative Feed Restriction on the Post-weaning Growth Traits of Rabbits
Summary The purpose of this paper is to determine the effects of four genotypes and four different quantitative feeding regimes on the post-weaning average feed intake (AFI), body weight (BW), weight gain (WG) and feed conversion ratio (FCR) of 48 unsexed weaner rabbits. At weaning, a total of 3 rabbits from each genotype considered, namely the purebred Chinchilla and New Zealand White (CH x CH, NZW x NZW) and their reciprocal crossbreds (CH x NZW, NZW x CH), were randomly assigned to four feeding regimes: ad libitum concentrate + ad libitum forage (A), ad libitum concentrate + 30% restricted forage (B), 30% restricted concentrate + ad libitum forage (C), and 30% restricted concentrate + 30% restricted forage (D). The data were subjected to a two-way analysis of variance in a completely randomized design appropriate for a 4x4 factorial experiment. The experiment was conducted over a period of 5 weeks: from 7 to 11 weeks post-weaning. The AFI values obtained from the interactions between CH x CH and the C feeding regime at 7 weeks post-weaning (366.50 ± 1.50 g), and between NZW x NZW and the B feeding regime at 8 weeks (324.00 ± 1. 00 g) and 10 weeks post-weaning (336.50 ± 0.00 g) were similar, but differed significantly (P < 0.05) from the rest. The lowest significant AFI values (P < 0.05) at all ages and FCR values (3.46 ± 0.33) at 9 weeks post-weaning were obtained from NZW x NZW, whereas the highest BW values at 9-11 weeks post-weaning was obtained from CH x CH. The lowest significant AFI values (P < 0.05) were recorded in the B feeding regime at 7-11 weeks post-weaning, as well as the highest BW and WG values in the A feeding regime at 8–11 and 11 weeks post-weaning, respectively. Moreover, the highest significant BW values (781.25 ± 7.83) were recorded in the C feeding regime at 7 weeks post-weaning. It was concluded that the interactions between CH x CH and the C feeding regime and between NZW x NZW and the B feeding regime can significantly reduce the overall feed intake, thus invariably increasing profit in rabbit production.
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