| 摘要: |
| 为了解不同NDF水平全价颗粒饲料对断奶公犊牛屠宰性能和组织器官发育的影响,选用12头3月龄中国荷斯坦断奶公犊,按照日龄相近((103.92±1.5) d)、体重相似((121.25±4.12) kg)的原则随机分成4组,每组3头,分别饲喂精粗料4种质量比为75:25、70:30、65:35和60:40的全价颗粒饲料,预试期14 d,正试期56 d。4种全价颗粒饲料除NDF水平不同外,其他营养成分含量相近。饲养试验结束后犊牛进行屠宰,测定其屠宰性能及各组织器官鲜重。结果表明:不同NDF水平全价颗粒饲料对犊牛屠宰性能无显著影响 (P>0.05);处理组Ⅳ犊牛复胃和瘤胃重显著高于处理组Ⅰ、Ⅱ(P<0.05);此外,处理组Ⅳ的肠道重量显著高于处理组Ⅰ(P<0.05)。综上所述,NDF水平高的全价颗粒饲料,不仅能保持相同屠宰性能,而且能促进断奶犊牛胃肠道的生长发育。 |
| 关键词: 奶公犊 NDF水平 颗粒饲料 屠宰性能 胃肠道 |
| DOI：10.11841/j.issn.1007-4333.2015.02.016 |
| 投稿时间：2014-06-23 |
| 基金项目:国家"十二五"科技支撑计划项目(2011BAD17B02) |
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| Effects of the complete diet pellets with different NDF levels on slaughter traits and tissues and organs development of the weaned bull calves |
|
YANG Hong-bo, LIU Hong, ZHU Long-ji, CHEN Yin-yue, CHEN Zhi-yuan, ZHAO Guo-qi
|
| (College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China) |
| Abstract: |
| The aim of this study was to research the effects of complete diet pellets with different neutral detergent fiber (NDF) levels on slaughter traits and tissues and organs development of weaned bull calves.A total of 12 health weaned bull Holstein calves (days=(103.92±1.5) d, weight =(121.25±4.12) kg) were used and assigned randomly to 4 groups (Ⅰ, Ⅱ, Ⅲ and Ⅳ), with 3 calves per group.The treatment diets were four concentrate-roughage ratios (75:25, 70:30, 65:35, 60:40), and with different NDF levels, but all other nutrient levels being equal.The experiment was conducted over a period of 70 days, including 14d for adaptation and 56 d for data collection.Experimental calves will be slaughtered at the end of the feeding examination, their slaughter performance and tissues and organs weight were measured.The results showed that there was no significant difference in slaughter performance of calves among the treatments (P>0.05).As the concentrate-roughage ratio increased, complex stomach weight and rumen weight of calves were increased, and those of the treatment Ⅳ were significantly higher than those of treatment ⅠandⅡ (P<0.05).Also, intestine weight of treatment Ⅳ was significantly higher than that of treatment Ⅰ(P<0.05).The results indicated that pellet feed with high level of roughage is conducive to the development of the gastrointestinal tract calves, and could keep the same slaughtering performance. |
| Key words: dairy bull calves NDF level pellet feed slaughter performance gastrointestinal tract |
