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草业学报 ›› 2016, Vol. 25 ›› Issue (10): 163-170.DOI: 10.11686/cyxb2016129

• 研究论文 • 上一篇    下一篇

秸秆制粒对肉牛反刍、消化、瘤胃发酵及体增重的影响

胡江1, 2, 王毅1, 3, 赵芳芳1, 2, 刘秀1, 2, 权金鹏4, 牛晓亮1, 2, 韩向敏1, 2, *   

  1. 1.甘肃农业大学动物科学技术学院,甘肃 兰州 730070;
    2.甘肃农业大学甘肃省草食动物生物技术重点实验室,甘肃 兰州 730070;
    3.兰州市畜牧兽医研究所,甘肃 兰州 730050;
    4.张掖市草原工作站,甘肃 张掖 734000
  • 收稿日期:2016-03-23 出版日期:2016-10-20 发布日期:2016-10-20
  • 通讯作者: E-mail:min65@sina.com
  • 作者简介:胡江(1975-),男,甘肃秦安人,副教授,博士。E-mail:huj@gsau.edu.cn
  • 基金资助:
    国家科技支撑计划课题(2012BAD14B10-5),甘肃省科技支撑计划项目(1204NKCA082)和甘肃省星火计划项目(1205NCXG224)资助

Effects of straw pellets on rumen function and live weight gain of beef cattle

HU Jiang1, 2, WANG Yi1, 3, ZHAO Fang-Fang1, 2, LIU Xiu1, 2, QUAN Jin-Peng4, NIU Xiao-Liang1, 2, HAN Xiang-Min1, 2, *   

  1. 1.College of Animal Science & Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2.Key Laboratory of Herbivorous Animal Biotechnology of Gansu, Gansu Agricultural University, Lanzhou 730070, China;
    3.Research Institute of Animal Husbandry and Veterinary of Lanzhou, Lanzhou 730050, China;
    4.Grassland Workstation of Zhangye, Zhangye 734000, China
  • Received:2016-03-23 Online:2016-10-20 Published:2016-10-20

摘要: 本研究测定分析了秸秆制粒饲喂肉牛对其采食、反刍、养分表观消化率、瘤胃发酵和增重的影响,以丰富秸秆饲料化利用方式。试验选取30头18月龄左右、活重接近的西杂肉牛,随机分成3组(每组10头),分别饲喂粉碎玉米秸秆(对照组)、玉米秸秆颗粒饲料(试验Ⅰ组)及玉米秸秆精粗饲料颗粒(试验Ⅱ组)。结果表明,1)秸秆制粒饲喂肉牛,其采食、反刍、咀嚼时间均有所缩短,且每食团咀嚼时间显著少于对照组(P=0.004),而试验Ⅱ组采食时长显著低于对照组(P=0.032)。2)除试验Ⅰ组中性洗涤纤维的表观消化率显著低于对照组外(P<0.05),3组肉牛其他养分的表观消化率均无显著差异。3)秸秆粉碎制料后饲喂肉牛影响瘤胃发酵,与对照组比较,试验Ⅰ组瘤胃pH值及丁酸含量显著下降(P<0.05),而乙酸含量和乙酸/丙酸显著升高(P<0.05);试验Ⅱ组瘤胃液丁酸含量显著下降(P<0.05),乙酸/丙酸及NH3-N含量显著升高(P<0.05)。4)秸秆粉碎制粒饲喂肉牛能显著增加日增重和饲料转化率(P<0.05),试验Ⅰ组及试验Ⅱ组日增重较对照组分别高出0.36和0.38 kg,饲料转化率(料重比)分别提高27.86%和29.09%。

Abstract: The effects of different corn straw pellets on rumen function, apparent digestibility, rumen fermentation and weight gain of beef cattle were determined to assess the potential for increased use of straw in feed processing. Thirty 18-month old Simmental cross cattle with similar body weight were randomly divided into a control group and two groups fed straw, groupⅠ and group Ⅱ. Ten animals were allocated to each group. The control and groupⅠ groups were fed crushed corn straw and corn straw pellets at 50% of dietary fibre, respectively. Group Ⅱ was fed straw-concentrate pellets providing the same corn fibre intake as the groupⅠ diet. The results showed that ingestion, rumination and chew time of cattle fed straw pellets were shorter than that those fed crushed straw, and chew time per food ball of cattle fed straw pellets and ingestion time of group Ⅱ animals were significantly lower than the control group (P<0.05). There were no differences in apparent digestibility of diets in any group except for NDF (neutral detergent fiber) digestibility in groupⅠ which was significantly lower than the control group (P<0.05). Rumen fermentation differed among the three groups; groupⅠ had lower pH value and butyrate content in rumen gastric juice than the control group (P<0.05), but had higher acetate content and acetate/propionate ratio(P<0.05). There were significantly decreased butyrate content and increased acetate/propionate ratio and NH3-N content in rumen gastric juice from group Ⅱ than that the control group(P<0.05). Higher daily weight gain and feed conversion rate were observed in groupⅠ and group Ⅱ animals(P<0.05); daily weight gain increased by 0.36 kg and 0.38 kg and feed conversion increased by 27.9% and 29.1% compared with the control group, respectively.