Tufarelli V, Lacalandra G M, Aiudi G, Binetti F, Laudadio V
Department of Animal Health and Welfare, Faculty of Veterinary Medicine, University of Study of Bari Aldo Moro, Strada Provinciale per Casamassima km 3, 70010 Valenzano, BA, Italy.
Trop Anim Health Prod. 2011 Feb;43(2):339-45. doi: 10.1007/s11250-010-9695-y. Epub 2010 Sep 22.
The aim of the present study was to assess the effects feeding level on body weight changes and semen parameters in adult Sardinian rams reared under intensive conditions in a semi-arid area of southern Italy. During an experimental period of 90 days, 24 healthy Sardinian rams were divided into three equal groups that differed in their feeding level, in terms of concentrate amount. The control-concentrate (CC; n = 8) group received 1.0 times their maintenance requirements, the medium-concentrate (MC; n = 8) group received a diet that supplied 1.2 times their maintenance requirements, and high-concentrate (HC, n = 8) group received a diet that supplied 1.5 times their maintenance requirements. Mixed vetch-oat hay was offered ad libitum to ram groups and water and mineral licks were freely available. Body weight and feed intake was recorded weekly, and semen characteristics were determined every 2 weeks. Dietary treatment affected final body weight (P < 0.01) as feeding level increased. Total dry matter and protein intake changed significantly (P < 0.05 and P < 0.01, respectively) among experimental groups. Semen volume and concentration were positively influenced by feeding level for HC group, whereas no differences were observed in sperm viability and scrotal circumference of rams. It was concluded that dietary level with higher concentrate supplementation resulted in improved body weight gain, feed intake, sperm production, and semen quality in Sardinian rams.
本研究的目的是评估饲养水平对在意大利南部半干旱地区集约化条件下饲养的成年撒丁岛公羊体重变化和精液参数的影响。在90天的试验期内，将24只健康的撒丁岛公羊分为三组，每组数量相等，三组在精料量方面的饲养水平不同。对照精料组（CC；n = 8）接受的饲料量为维持需要量的1.0倍，中等精料组（MC；n = 8）接受的日粮提供的饲料量为维持需要量的1.2倍，高精料组（HC，n = 8）接受的日粮提供的饲料量为维持需要量的1.5倍。向公羊组随意提供混合巢菜-燕麦干草，公羊可自由饮水和舔食矿物质。每周记录体重和采食量，每2周测定一次精液特征。随着饲养水平的提高，日粮处理对最终体重有影响（P < 0.01）。各实验组之间的总干物质和蛋白质摄入量有显著变化（分别为P < 0.05和P < 0.01）。高精料组的精液体积和浓度受到饲养水平的积极影响，而公羊的精子活力和阴囊周长未观察到差异。得出的结论是，在撒丁岛公羊中，较高精料补充的日粮水平可提高体重增加、采食量、精子生成和精液质量。
