Abstract High-fibre diets have been suggested as alternative feeding strategies that potentially may alleviate the hunger felt by feed-restricted broiler breeders and fulfil their behavioural need for feeding behaviour. The aim of the present study was to investigate the effects of four dietary treatments, differing in fibre types and content, on the motivation for performing feeding behaviour, including both the appetitive and consummatory phase, in broiler breeder pullets. In total, 1200 female breeder chicks of the genotype Ross 308 were housed in 24 pens, six pens of initially 50 birds per treatment. The dietary treatments were: 1) standard feed (Control), 2) feed containing insoluble fibres (Insoluble), 3) feed containing a mix of insoluble and soluble fibres (Mixed) and 4) standard feed supplemented with maize silage (Roughage). Four measures of feeding motivation were obtained: feeding rate, behaviour indicating frustration during thwarted feeding, compensatory feed intake over 5 days and motivation to gain access to fresh litter. The latter was performed at 12–13 weeks of age, whereas the other measures were obtained both at 8–9 and 17–18 weeks of age. Litter quality in the home pens was assessed at age 13 weeks and dry matter content at 5, 13 and 14 weeks of age. Feeding rate was not affected by treatment (P = 0.26). Insoluble and Mixed birds showed fewer behavioural transitions, i.e. changes in activity, during thwarted feeding at 17/18 weeks of age than Control birds (P = 0.004), indicating less frustration and thus a lower feeding motivation. The compensatory feed intake was lower for Insoluble birds compared to Control birds, indicating that the Insoluble treatment reduced the hunger experienced by the birds. Mixed birds were clearly more motivated to gain access to the fresh litter with more and faster crossings into the litter compartment (P ≤ 0.01). Although foraging was the predominant behaviour performed in the litter compartment, Mixed birds spent less time on locomotion (P = 0.002), more time on comfort behaviour (P = 0.02) and more time resting (P

中文翻译：

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饲喂不同类型限制性高纤维日粮的肉种鸡小母鸡的饲喂动机

摘要 高纤维日粮已被建议作为替代喂养策略，有可能减轻饲料限制肉鸡饲养者的饥饿感，并满足他们对喂养行为的行为需求。本研究的目的是调查四种不同纤维类型和含量的日粮处理对肉鸡种母鸡采食行为动机的影响，包括食欲和完成阶段。总共有 1200 只 Ross 308 基因型雌性种鸡被圈养在 24 个围栏中，每个处理最初 50 只鸡的六个围栏。日粮处理为：1）标准饲料（对照），2）含有不溶性纤维的饲料（不溶性），3）含有不溶性和可溶性纤维的混合物的饲料（混合）和 4）补充有玉米青贮饲料（粗饲料）的标准饲料。获得了四种喂养动机的衡量标准：喂养率、受阻喂养期间表现受挫的行为、超过 5 天的补偿性采食量和获得新鲜垫料的动机。后者在 12-13 周龄时进行，而其他测量在 8-9 周龄和 17-18 周龄时进行。家庭围栏的垫料质量在 13 周龄时进行评估，干物质含量在 5、13 和 14 周龄时进行评估。摄食率不受处理的影响（P = 0.26）。在 17/18 周龄的受阻喂养期间，不溶性和混合鸡显示出较少的行为转变，即活动的变化（P = 0.004），表明受挫程度较低，因此进食动机较低。与对照鸡相比，不溶性鸡的补偿饲料摄入量较低，表明不溶性处理减少了鸟类所经历的饥饿感。混种鸡明显更有动力获得新鲜的垫料，更多、更快地进入垫料隔间（P ≤ 0.01）。尽管觅食是在垫料室中进行的主要行为，但混合鸟类在运动上花费的时间更少（P = 0.002），在舒适行为上花费的时间更多（P = 0.02）和更多的休息时间（P