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草业学报 ›› 2009, Vol. 18 ›› Issue (3): 224-231.

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日粮补充苹果酸对牛瘤胃发酵和养分消化代谢的影响

王聪1,刘强1,董群1,杨效民2,贺东昌2,董宽虎1   

  1. 1.山西农业大学动物科技学院,山西 太谷 030801;
    2.山西省农业科学院畜牧兽医研究所,山西 太原 030032
  • 收稿日期:2008-07-07 出版日期:2009-06-20 发布日期:2009-06-20
  • 作者简介:王聪(1973-),女,山西寿阳人,副教授,博士。E-mail: wangdx0321@163.com
  • 基金资助:
    “十一五”国家科技支撑计划项目(2007BAD56B04)资助。

Effects of malic acid supplementation on rumen fermentation, nutrient digestion
and metabolism in Simmental steer

WANG Cong1, LIU Qiang1, DONG Qun1, YANG Xiao-min2, HE Dong-chang2, DONG Kuan-hu1   

  1. 1.College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;

    2. Institute of Animal Science, Shanxi Academy of Agricultural Science, Taiyuan 030032, China
  • Received:2008-07-07 Online:2009-06-20 Published:2009-06-20

摘要: 选用8头体重462 kg、年龄3岁、装有永久性瘤胃瘘管的西门塔尔牛阉牛,采用4×4重复拉丁方设计,对照组饲喂基础日粮,处理组分别在基础日粮基础上添加苹果酸70,140和210 g/d,研究苹果酸对西门塔尔牛瘤胃发酵、尿嘌呤衍生物含量、日粮养分表观消化率、能量代谢及氮平衡的影响。结果表明,140和210 g/d组瘤胃pH值显著低于对照组,瘤胃乙酸摩尔比、乙酸/丙酸、氨态氮浓度和乳酸含量显著低于对照组和70 g/d组(P<0.05),瘤胃总挥发性脂肪酸浓度、丙酸和丁酸摩尔比显著高于对照组和100 g/d组(P<0.05)。140 g/d组玉米秸秆干物质、有机物质、中性洗涤纤维和酸性洗涤纤维瘤胃有效降解率显著高于对照组(P<0.05);210 g/d组混合精料干物质、有机物质和粗蛋白质瘤胃有效降解率显著低于对照组、70和140 g/d组(P<0.05)。140 g/d组尿囊素和尿嘌呤衍生物含量显著高于70和210 g/d组及对照组(P<0.05);140和210 g/d组有机物质、粗脂肪、无氮浸出物、中性洗涤纤维和酸性洗涤纤维表观消化率显著高于对照组(P<0.05);140 g/d组消化能、代谢能、沉积能及沉积能/消化能显著高于对照组(P<0.05);140 g/d组沉积氮显著高于对照组(P<0.05)。综合各项指标,苹果酸的适宜添加水平为140 g/d。

Abstract: This study evaluated the effects of malic acid on rumen fermentation, urinary excretion of purine derivatives, nutrient digestibility, energy metabolism, and nitrogen balance of steers. Eight ruminally cannulated Simmental steers were used in a replicated 4×4 Latin square experiment. The treatment without malic acid was the control, and treatments 1, 2, and 3 were supplemented with 70, 140, and 210 g malic acid per steer per day, respectively. Ruminal pH of steers supplemented with malic acid at 140 and 210 g/d was significantly (P<0.05) lower than that in the control. The ratio of acetate to propionate, ruminal ammonia nitrogen and ruminal lactate concentrations of steers supplemented with malic acid at 140 and 210 g/d were significantly (P<0.05) lower than those at 70 and in the control. Total VFA concentration and the molar proportions of propionate and butyrate of steers supplemented with malic acid at 140 and 210 g/d were significantly (P<0.05) greater than those at 70 and in the control. Ruminal dry matter, organic matter, neutral detergent fiber and acid detergent fiber degradation of corn straw in the 140 g/d malic acid treatment were significantly (P<0.05) greater than those in the control. Ruminal dry matter, organic matter and crude protein degradation of concentrate in the 210 g/d malic acid treatment were significantly (P<0.05) lower than those in thte other treatments. Allantoin concentration and urinary excretion of purine derivatives of steers in the 140 g/d malic acid treatment were significantly (P<0.05) greater than those in the 70, 210 g/d treatments and in the control. Dietary organic matter, nitrogen free extract, ether extract, neutral detergent fiber and acid detergent fiber digestibilities of steers supplemented with malic acid at 140 and 210 g/d were significantly (P<0.05) greater than those in the control. Digestible energy, metabolizable energy, retention energy and the ratio of retention energy to digestible energy of steers in the 140 g/d malic acid treatment were significantly (P<0.05) greater than those in the control. Retention nitrogen of steers in the 140 g/d malic acid treatment was significantly (P<0.05) higher than that in the control. The results indicated that the optimum dose of malic acid supplement was 140 g/d.

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