研究论文 RESEARCH PAPER

枣粉与包被蛋氨酸对育肥牛生长性能、养分表观消化率、瘤胃发酵和血清生化指标的影响

  • 刘永青 ,
  • 刘辰 ,
  • 冯泽伟 ,
  • 张凯 ,
  • 刘强
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  • 1. 吕梁学院生命科学系, 离石 033001;
    2. 山西农业大学动物科学学院, 太谷 030801
刘永青(1985-),男,山西柳林人,讲师,硕士,研究方向为动物营养与生化。E-mail:liuyongqing07@163.com

收稿日期: 2021-07-29

  网络出版日期: 2022-02-15

基金资助

山西省高等学校科技创新项目(2019L0974);吕梁市科技计划项目(2021NYGG-2-65)

Effects of Jujube Power and Coated Methionine on Growth Performance, Nutrient Apparent Digestibility, Rumen Fermentation and Serum Biochemical Indexes in Finishing Bulls

  • LIU Yongqing ,
  • LIU Chen ,
  • FENG Zewei ,
  • ZHANG Kai ,
  • LIU Qiang
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  • 1. Department of Life Sciences, Luliang University, Lishi 033001, China;
    2. College of Animal Science, Shanxi Agricultural University, Taigu 030801, China

Received date: 2021-07-29

  Online published: 2022-02-15

摘要

本试验旨在研究饲粮添加枣粉(JP)和包被蛋氨酸(CMet)对育肥期肉牛生长性能、养分表观消化率、瘤胃发酵和血清生化指标的影响。采用双因子试验设计,试验因素分别为JP (JP替代饲粮玉米比例为0或15%,JP-/JP+)和CMet (饲粮添加0或1.08 g/kg蛋氨酸有效成分,CMet-/CMet+)。将20头月龄与体重相近的育肥期肉牛(西门塔尔×本地黄牛)随机分为4组,分别饲喂基础饲粮、基础饲粮+JP、基础饲粮+CMet以及基础饲粮+JP+CMet,每组5个重复,每个重复1头牛。试验期共70 d,其中预试期10 d,正试期60 d。结果表明:1)饲粮添加JP显著提高了干物质采食量和平均日增重(P<0.05);而添加CMet仅显著提高了平均日增重(P<0.05);JP与CMet对生长性能互作效应不显著(P>0.05)。2)饲粮添加JP显著提高了粗蛋白质、酸性洗涤纤维和非纤维碳水化合物表观消化率(P<0.05);饲粮添加CMet则显著提高了粗蛋白质、有机物和非纤维碳水化合物表观消化率(P<0.05);JP与CMet对粗蛋白质和非纤维碳水化合物表观消化率互作效应显著(P<0.05)。3)饲粮添加JP显著提高了瘤胃纤维二糖酶和木聚糖酶活性及总挥发性脂肪酸浓度(P<0.05);而饲粮添加CMet显著降低了瘤胃pH和氨态氮浓度(P<0.05),提高了瘤胃蛋白酶活性和丙酸浓度(P<0.05);JP与CMet对瘤胃发酵互作效应不显著(P>0.05)。4)饲粮添加JP显著增加了血清葡萄糖含量、总抗氧化能力和超氧化物歧化酶活性(P<0.05),降低了血清丙二醛含量(P<0.05);饲粮添加CMet显著增加了血清葡萄糖、总蛋白含量和总抗氧化能力(P<0.05),降低了血清尿素氮和丙二醛含量(P<0.05);JP与CMet对血清丙二醛含量互作效应显著(P<0.05)。综上所述,相比单独添加,JP与CMet互作未能显著促进育肥牛生长性能,但通过增加养分表观消化率提高了抗氧化能力。

本文引用格式

刘永青 , 刘辰 , 冯泽伟 , 张凯 , 刘强 . 枣粉与包被蛋氨酸对育肥牛生长性能、养分表观消化率、瘤胃发酵和血清生化指标的影响[J]. 动物营养学报, 2022 , 34(2) : 1076 -1086 . DOI: 10.3969/j.issn.1006-267x.2022.02.039

Abstract

The study was conducted to investigate the effects of jujube power (JP) and coated methionine (CMet) in diets on growth performance, nutrient apparent digestibility, rumen fermentation and serum biochemical indexes in finishing bulls. A two-factor completely randomized design was arranged with JP (JP replacing 0 or 15% maize in the diet, JP-/JP+) and CMet (adding 0 or 1.08 g/kg dry matter to the diet, CMet-/CMet+). Twenty finishing bulls (Simmental×Local) with similar age and body weight were randomly divided into four groups and fed a basal diet, the basal diet+JP, the basal diet+CMet and the basal diet+JP+CMet, respectively, with five replicates of one cow in each group. The feeding test period lasted for 70 d. The pre-trial period lasted for 10 days and the formal trial period lasted for 60 days. The results showed as follows:1) dietary JP addition significantly improved dry matter intake and average daily gain (P<0.05); dietary CMet addition only increased average daily gain (P<0.05); there was no significant interaction between JP and CMet in growth performance (P>0.05). 2) Dietary JP addition significantly increased the apparent digestibilites of crude protein, acid detergent fiber and non-fiber carbohydrate (P<0.05); the increment of apparent digestibilites in organic matter, crude protein and non-fiber carbohydrate were found by adding CMet in the diets (P<0.05); a significant JP×CMet interaction was found in apparent digestibilites of crude protein and non-fiber carbohydrate (P<0.05). 3) The significant improvement in the activities of cellodisaccharase and xylanase and the concentration of total volatile fatty acids in the rumen was observed with dietary JP addition (P<0.05); pH and ammonia nitrogen concentration in the rumen were significantly decreased and rumen proteinase activity and propionic acid concentration were increased with CMet supplement in the diets (P<0.05); there was no significant interaction between JP and CMet in rumen fermentation (P>0.05). 4) Serum glucose content, total antioxidant capacity and superoxide dismutase activity were significantly increased (P<0.05) but serum malondialdehyde content was significantly decreased in the dietary JP supplementation (P<0.05); dietary CMet supplementation showed a significant increment in the serum glucose, total protein contents and total antioxidant capacity (P<0.05), and a significant decrease in the serum urea nitrogen and malondialdehyde contents (P<0.05); there was a significant JP and CMet interaction effect on serum malondialdehyde concentration (P<0.05). In general, compared with the addition of JP and CMet alone, the interaction between JP and CMet failed to significantly promote growth performance of finishing bulls but improve antioxidant capacity by increasing nutrient apparent digestibility.

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