Preference by sheep and goats among hay of eight tall fescue cultivars.
Preference by sheep and goats among hay of eight tall fescue cultivars.
复制标题
绵羊和山羊对八个高羊茅品种干草的偏好。
DOI：
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发表时间：
2001
影响因子：
3.3
通讯作者：
H. F. Mayland
中科院分区：
文献类型：
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作者：
J. C. Burns;D. S. Fisher;H. F. Mayland
吃草的反刍动物在选择食物时既使用视觉提示，也使用味觉。放牧期间的喜好可能不同，当牧草干燥成干草，并在圈养饲养之前切成几段。8个高羊茅(Festuca arundinacea Schreb.)品种在两年的时间里收获了三次，这些品种以前在放牧时被评估为喜好。干草被风干、打包，并在饲喂之前通过液压打包处理机。共进行了五个实验。所有三次收获都是用绵羊进行评估，最后两次也是用山羊进行评估，每次使用六只动物。在适应阶段，干草被单独作为食物提供。在实验阶段，每对可能的干草(28对)都被赠送给一顿饭。采用多维标度和传统分析方法对数据进行分析。在所有试验中，品种间的偏好性显著。多维尺度显示，选择基于两个标准，其中两个维度具有显著意义。绵羊更喜欢肯尼，紧随其后的是肯塔基31和斯塔格拉泽，但更喜欢巴塞尔。HIMAG、MO-96和C1是中间体，Mozark是可变的。山羊和绵羊在偏好肯尼方面相似，其次是斯塔格拉泽，并与莫扎克和巴塞尔进行了选择。肯塔基31、HIMAG、MO-96和C1为中间型。在所有五个实验中，有效碳水化合物组分的总体关联性为正，而有助于细胞壁刚性的纤维组分的关联性为负。
Grazing ruminants use both visual cues and taste in selecting their diet. Preference during grazing may not be the same when forage is dried for hay and cut into lengths prior to feeding in confinement. Eight cultivars of tall fescue (Festuca arundinacea Schreb.), previously evaluated for preference while grazed, were harvested three times over a period of 2 yr. The hays were air-dried, baled, and passed through a hydraulic bale processor prior to feeding. Five experiments were conducted. All three harvests were evaluated with sheep and the last two also with goats, using six animals each time. During an adaptation phase, hays were offered alone as meals. In the experimental phase, every possible pair of hays (28 pairs) was presented for a meal. Data were analyzed by multidimensional scaling and by traditional analyses. Preference was significant among cultivars in all experiments. Multidimensional scaling showed that selection was based on two criteria with two dimensions being significant. Sheep preferred KENHY followed by KENTUCKY 31 and STARGRAZER but preferenced against BARCEL. HIMAG, MO-96, and C1 were intermediate and MOZARK was variable. Goats were similar to sheep in preferring KENHY followed by STARGRAZER and selected against MOZARK and BARCEL. KENTUCKY 31, HIMAG, MO-96, and C1 were intermediate. In all five experiments, the general association was positive for available carbohydrate fractions and negative for fiber fractions that contribute to cell wall rigidity.