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外文期刊>Spanish Journal of Agricultural Research
>Effect of stocking density and use of environmental enrichment materials on the welfare and the performance of pigs in the growth and finishing phases
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Effect of stocking density and use of environmental enrichment materials on the welfare and the performance of pigs in the growth and finishing phases
Aim of study: To evaluate the effects of stocking density and the use of environmental enrichment (EE) objects on the welfare and the performance of pigs in the growing and finishing phases. Area of study : The southern region of Brazil. Material and methods : A total of 240 pigs, 120 immunocastrated males and 120 females, with an initial weight of 22.38 ± 2.38 kg and mean age of 65 days, were submitted to two stocking densities conditions (0.85 and 1.28 m2pig) with and without EE for 117 days. The experimental design was a 2×2×2 factorial (two categories, two densities, and two EE conditions), with six replicates. Performance variables and behavior were evaluated. Main results : For stocking density, there was a significant difference in the finishing phase from 148 to 161 days of age for the final weight (FW), average daily weight gain (ADWG), and feed conversion rate (FCR). For the EE factor, there was no difference in any of the phases or in the overall period. In the overall period, the higher availability of space improved the results of FW (140.56 kg vs 136.63 kg), ADWG (1.005 kg vs 0.974 kg), and FCR (2.05 vs 2.10). There was no effect of EE, stocking densities, or their interaction on the frequency of different behaviors of the pigs in the growth and finishing phases. Research highlights: There was no effect of interactions between enriched environments, stocking densities, and sex for animal performance and behavioral frequencies; however, differences between the factors were observed separately. The higher availability of space improved the results of FW, ADWG, and FCR.
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机译：研究目的：评估库存密度和环境富集（EE）对象对福利和生长阶段猪的性能的影响。研究领域：巴西南部地区。材料和方法：总共240只猪，120只免疫薄膜和120名女性，初始重量为22.38±2.38千克，平均年龄为65天，提交两种库存密度条件（0.85和1.28m 2 Pig），没有ee 117天。实验设计是2×2×2因子（两类，两个密度和两个EE条件），六个重复。评估性能变量和行为。主要结果：对于袜密度，最终重量（FW）的148至161天的整理阶段有显着差异，平均每日体重增加（ADWG）和饲料转化率（FCR）。对于EE因子，任何阶段或整个期间都没有差异。在整个期间，空间的较高可用性改善了FW的结果（140.56千克，136.63千克），ADWG（1.005千克VS 0.974千克）和FCR（2.05 Vs 2.10）。 EE，放养密度或它们对生长和整理阶段的不同行为的频率的影响没有影响。研究亮点：富集环境与动物性能和行为频率的性别之间没有相互作用的影响;然而，因子之间的差异分别观察到。空间的较高可用性改善了FW，ADWG和FCR的结果。
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