...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Small Ruminant Research >Effects of season on fleece traits of angora does in the US
【24h】

Effects of season on fleece traits of angora does in the US

机译：在美国，季节对长毛兔羊毛特性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Twenty nonpregnant Angora does were used to determine seasonal effects on fleece traits, including fiber growth and follicle activity. Does grazed pastures and were supplemented with a 50% concentrate diet at a level near that required for BW maintenance. Clean fiber growth rate was greatest (p<0.05) among seasons in summer and lowest (p<0.05) in winter (1.13, 0.85, 0.98 and 1.20 mg/cm~2 per day for autumn, winter, spring and summer, respectively); seasonal differences in fiber diameter were similar (34.9, 31.7, 33.7 and 36.5 #mu#m for autumn, winter, spring and summer, respectively). Fleece fiber medullation was greatest (p<0.05) in summer (0.48, 0.32, 0.40 and 0.76%), and medullated fiber diameter was greater in spring and summer than winter (69, 65, 73 and 71 #mu#m for autumn, winter, spring and summer, respectively). Primary follicle activity varied with season more than did activity of secondary follicles (primary: 74, 23, 79 and 99%; secondary: 97, 86, 94 and 99%; for autumn, winter, spring and summer, respectively). In summary, Angora goats in the US appear to exhibit seasonal follicle and fiber growth cycles, the knowledge of which may improve future nutritional management for efficient feed use in mohair production. The optimal time of shearing US Angoras for minimal contamination with medullated fibers may be just before spring and autumn equinoxes when it is likely that medullated fibers have been recently shed.
机译：二十只未怀孕的安哥拉猫被用来确定对羊毛性状的季节性影响，包括纤维生长和卵泡活动。放牧牧场并补充50％的浓缩饮食，其水平接近维持体重所需的水平。在夏季，清洁纤维的生长速率最高（p <0.05），而在冬季则最低（p <0.05）（冬季分别为秋季，冬季，春季和夏季，分别为每天1.13、0.85、0.98和1.20 mg / cm〜2）。 ;纤维直径的季节性差异相似（秋季，冬季，春季和夏季分别为34.9、31.7、33.7和36.5＃μm）。夏季（0.48、0.32、0.40和0.76％）的羊毛纤维延髓最大（p <0.05），春季和夏季的延髓纤维直径大于冬季（秋天的69、65、73和71＃μm），分别是冬季，春季和夏季）。初级卵泡活动随季节变化比次级卵泡活动大（初级：74％，23％，79％和99％;次级：97％，86％，94％和99％;分别为秋季，冬季，春季和夏季）。总而言之，美国安哥拉山羊似乎表现出季节性的卵泡和纤维生长周期，对此的了解可能会改善未来的营养管理，以有效地在马海毛生产中使用饲料。当有可能最近脱落了有髓纤维时，剪切美国安哥拉以使有髓纤维受到最小污染的最佳时间可能恰在春秋分点之前。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号