Effects of modulating space density via the number of pigs in a pen on feeder use and feeder access in the finishing period

IF 1.9 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Mathilde Coutant, Noémie Menard, Lene J. Pedersen, Mona L.V. Larsen
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Abstract

High stocking density can affect how finishing pigs access and use feeders. This study investigated how different space allowances, achieved by varying the number of pigs per pen, influenced feeder use and obstruction during the finishing period. A total of 197 pigs were assigned to one of three treatments: CON (18 pigs/pen, 0.7 m²/pig, n = 6 pens), SP9 (9 pigs/pen, 1.4 m²/pig, n = 6), and SP6 (6 pigs/pen, 2.8 m²/pig, n = 6). Each pen had one feeder with three headspaces. At weeks 2, 5, and 10, videos were recorded between 14:30 and 16:30 and scan-sampled every 20 seconds. Feeder use was defined as a pig with its head inside a headspace; feeder obstruction as a pig sitting or lying in front of a headspace, blocking access. Queuing was also recorded. Absolute feeder use was higher in CON than in SP9 and SP6 (P < 0.01), although use across the afternoon did not differ clearly between treatments. However, feeder obstruction was significantly more frequent in CON, particularly at week 10 (P < 0.01), with up to 75% of observations showing all headspaces blocked. Queuing was rare but mostly observed in CON. Across treatments, pigs preferred the outer headspaces (P < 0.01), while obstruction occurred most often near the solid floor (P < 0.01). In conclusion, high stocking density increases feeder obstruction, especially in later finishing stages. Reducing pig numbers per pen may improve access, but further refinement of pen and feeder design is recommended.
通过圈内猪数调节空间密度对育肥期饲粮使用和饲粮通道的影响
高放养密度会影响育肥猪获取和使用饲料的方式。本研究调查了不同空间,通过改变每个猪圈的猪数,如何影响育肥期喂料器的使用和阻塞。197头猪被分为CON(18头/圈,0.7 m²/头,n = 6个猪圈)、SP9(9头/圈,1.4 m²/头,n = 6)和SP6(6头/圈,2.8 m²/头,n = 6) 3个处理。每个笔有一个喂食器,有三个顶空。在第2周、第5周和第10周,在14:30到16:30之间录制视频,每20秒扫描一次。喂食器的使用被定义为猪的头在顶空内;喂食器的障碍物,如猪坐在或躺在一个头顶空间前,阻碍进入。排队也被记录了下来。CON组饲粮的绝对使用量高于SP9和SP6组(P < 0.01),但处理间下午饲粮的使用量差异不明显。然而,喂食器阻塞在CON中明显更频繁,特别是在第10周(P < 0.01),高达75%的观察显示所有头顶空间阻塞。排队现象很少见,但在con中最常见。在不同的处理中,猪更喜欢外部顶空间(P < 0.01),而阻塞最常发生在固体地板附近(P < 0.01)。综上所述,较高的放养密度增加了饲养障碍,特别是在肥育后期。减少每个猪圈的生猪数量可能会改善进入猪圈的机会,但建议进一步改进猪圈和喂食器的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Livestock Science
Livestock Science 农林科学-奶制品与动物科学
CiteScore
4.30
自引率
5.60%
发文量
237
审稿时长
3 months
期刊介绍: Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.
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