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草业学报 ›› 2011, Vol. 20 ›› Issue (3): 122-127.

• 研究论文 • 上一篇    下一篇

南方苜蓿新品种“渝苜一号”饲喂肉兔的营养价值评定

郭志强1,2,宋代军1*,玉永雄1,谢晓红2,易军2 ,张家骅1 ,雷岷2   

  1. 1.西南大学动物科技学院,重庆 400716;
    2.四川省畜牧科学研究院,四川 成都 610066
  • 收稿日期:2010-08-02 出版日期:2011-03-25 发布日期:2011-06-20
  • 通讯作者: E-mail:djsong@swu.edu.cn
  • 作者简介:郭志强(1981-),男,河南安阳人,硕士。E-mail:ygzhiq@126.com
  • 基金资助:
    973计划项目(2007CB108901)和国家兔产业技术体系专项经费(nycytx-44)资助。

Research on nutrition evaluation of Yumu No.1 alfalfa in rabbit

GUO Zhi-qiang1,2, SONG Dai-jun1, YU Yong-xiong1, XIE Xiao-hong2, YI Jun2, ZHANG Jia-hua1, LEI Min2   

  1. 1.College of Animal Science and Technology, Southwest University, Chongqing 400716, China;
    2.Sichuan Animal Science Academy, Chengdu 610066, China
  • Received:2010-08-02 Online:2011-03-25 Published:2011-06-20

摘要: 试验旨在研究苜蓿新品种“渝苜一号”的营养价值,为苜蓿干草在肉兔生产中的应用提供营养参数。试验系统地研究了“渝苜一号”5个不同生育期(营养期、现蕾期、初花期、盛花期、结荚期)的生长特性和干草的常规营养成分以及饲喂肉兔的可消化性。结果表明,生育期对“渝苜一号”干草营养价值影响显著(P<0.05),苜蓿干草叶茎比、鲜干比、粗蛋白质、粗脂肪、粗灰分和钙从营养期到结荚期各指标依次降低,总体呈“快-慢-快”的变化趋势,具有“椅式”的结构变化特征,磷有下降趋势,而中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)和木质素(ADL)各指标依次增加,也呈“快-慢-快”的变化趋势,具有“反椅式”的结构变化特征;从营养期到结荚期苜蓿干草干物质、消化能、粗蛋白质、粗脂肪、粗灰分、NDF和ADF的消化率逐渐降低,也呈“快-慢-快”的变化趋势;“渝苜一号”干草初花期和盛花期营养成分与消化率差异不显著(P>0.05),这点不同于北方苜蓿干草;“渝苜一号”干草各营养成分消化率与干草蛋白质含量呈正相关,与ADL含量呈负相关,各生育期消化率的差异,主要决定于苜蓿干草的蛋白质和ADL含量。

Abstract: This study was aimed at elaborating the nutritional value of new varieties of alfalfa(Medicago sativa), and providing nutritional parameters for the adaption of alfalfa in the South of China. Growth properties, general nutrition of alfalfa hay and digestibility on five different growth periods (vegetative stage, bud stage, early flowering, flowering and podding stage) of Yumu No.1 alfalfa were studied. There was a significant influence on the nutrition of alfalfa hay in different periods(P<0.05). The leaf/stem ratio, fresh/dry ratio, crude protein, ether extract, ash and calcium decreased in turn switching from the nutrition stage to the pod-besring period. The whole variation trend is quick-slow-qiuck, characterized as “chair-type”. The phosphorous decreased while the content of neutral detergent fiber, acid detergent fiber and acid detergent lignin increased from the nutrition stage to the pod-besring period. The whole trend showed fast-slow-fast anti-chair-type shape. The digestibility of alfalfa hay, digestible energy, crude protein, ether extract, ash, neutral detergent fiber, acid detergent fiber decreased in turn from vegetative stage to podding stage. Nutritional composition and digestibility of early flowering and flowering of Yumu No.1 alfalfa had no significant differences(P>0.05),which was different from the northern alfalfa hay. The nutrition composition digestibility of the alfalfa hay has a positive correlation with the protein content while a negative correlates with the ADL content. The influence of harvest time and variety on digestibility actually resulted from the combined effect of the protein of alfalfa hay and the content of acid detergent fiber.

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