《中国畜牧兽医》 ›› 2016, Vol. 43 ›› Issue (10): 2578-2590.doi: 10.16431/j.cnki.1671-7236.2016.10.011

• 动物营养与饲料科学 • 上一篇    下一篇

口服福尔马林和祛原虫对绵羊瘤胃微生物群落和消化酶活性的影响

蔡娟, 雒秋江, 王选, 陈勇, 臧长江   

  1. 新疆农业大学动物科学学院, 动物营养实验室, 乌鲁木齐 830052
  • 修回日期:2016-08-05 出版日期:2016-10-20 发布日期:2016-10-28
  • 通讯作者: 雒秋江 E-mail:qjl@xjau.edu.cn
  • 作者简介:蔡娟(1990-),女,新疆喀什人,硕士,研究方向:动物营养与饲料科学,E-mail:515205607@qq.com
  • 基金资助:

    新疆维吾尔自治区教育厅重点学科经费资助(XND-7-010)

Effect of the Oral Formalin and Fauna-free on the Microbiocoenosis and Activities of Digestive Enzymes in the Rumen of Sheep

CAI Juan, LUO Qiu-jiang, WANG Xuan, CHEN Yong, ZANG Chang-jiang   

  1. Laboratory of Animal Nutrition, Xinjiang Agricultural University, Urumchi 830052, China
  • Revised:2016-08-05 Online:2016-10-20 Published:2016-10-28

摘要:

选取6只2~3岁龄、体重48.3 kg±5.6 kg的小尾寒羊公羊,装置永久性瘤胃瘘管,并饲喂含70%玉米秸秆的日粮。在4×4拉丁方试验中分别给绵羊口服0 mL/kg日粮(对照,处理1组)、1.0 mL/kg日粮(低剂量,处理2组)、3.0 mL/kg日粮(高剂量,处理3组)福尔马林和完全祛原虫(处理4组),研究不同处理对绵羊瘤胃微生物群落、消化酶活性和氨态氮、VFAs浓度等的影响,及其与自由采食量的相关性。结果表明,处理2、3和4组与对照组相比,绵羊的干物质自由采食量分别增加14.9%(P<0.01)、-6.8%(P>0.05)和-16.5%(P<0.01);瘤胃液氨态氮浓度分别降低10.5%(P<0.05)、13.0%(P<0.05)和23.0%(P<0.01);原虫数量分别极显著减少59.3%、93.2%和100.0%(P<0.01);细菌总数分别极显著增加41.1%、-8.2%和84.5%(P<0.01);真菌拷贝数分别增加16.5%(P>0.05)、23.5%(P<0.05)和38.1%(P<0.01);内纤维素酶活性分别极显著升高22.6%、-14.6%和-27.5%(P<0.01);外纤维素酶活性分别极显著升高15.5%、-23.9%和-25.2%(P<0.01);纤维二糖酶活性分别极显著升高20.0%、-25.7%和-26.2%(P<0.01);木聚糖酶活性分别降低0.4%(P<0.05)、0.5%(P<0.05)和0.1%(P>0.05);果胶酶活性分别极显著降低12.0%、11.0%和2.8%(P<0.01);淀粉酶活性分别极显著升高12.2%、15.3%和19.9%(P<0.01);蛋白酶活性分别极显著降低22.1%、48.0%和22.2%(P<0.01)。其中内纤维素酶、外纤维素酶和纤维二糖酶活性与绵羊自由采食量的相关系数(R2)分别为0.994、0.897和0.901。由本试验得出结论,绵羊口服低剂量福尔马林时自由采食量增加,高剂量或祛原虫时降低;决定绵羊自由采食量的因素是瘤胃液内纤维素酶、外纤维素酶和纤维二糖酶活性,而非瘤胃原虫、细菌或真菌数量,或其他消化酶的活性。

关键词: 福尔马林; 祛原虫; 绵羊; 瘤胃

Abstract:

6 Small-tail Han sheep ram,2 to 3 year's old,with body weight of 48.3 kg±5.6 kg,were fitted with permanent rumen fistula and fed with the diet containing 70% of corn stalk.The experiment was designed as 4×4 Latin square,the sheep were orally administered with formalin at 0 mL/kg diet (control,treatment 1),1.0 mL/kg diet (low dose,treatment 2),3.0 mL/kg diet (high dose,treatment 3) and completely fauna-free (treatment 4),to study the effects of various treatments on the rumen microbiocoenosis,activities of digestive enzymes,NH3-N and VFAs in rumen fluid of sheep,and their correlation with voluntary intake.The results showed that,compared with control,the voluntary intakes of dry matter in treatments 1,2 and 3 were increased by 14.9% (P<0.01),-6.8% (P>0.05) and -16.5%(P<0.01),respectively;NH3-N were decreased by 10.5% (P<0.05),13.0% (P<0.05) and 23.0%(P<0.01),respectively;The protozoa number in rumen fluid were decreased by 59.3%,93.2% and 100.0%(P<0.01),respectively;The total number of bacteria were increased by 41.1%,-8.2% and 84.5%(P<0.01),respectively;The fungi copies were increased by 16.5%(P>0.01),23.5% (P<0.05) and 38.1%(P<0.01),respectively;The activities of endocellulase in treatments 1,2 and 3 were increased by 22.6%,-14.6% and -27.5%(P<0.01),respectively;The activities of exocellulase were increased by 15.5%,-23.9% and -25.2%(P<0.01),respectively;The activities of cellobiose were increased by 20.0%,-25.7% and -26.2%(P<0.01),respectively;The activities of xylanase were decreased by 0.4%(P<0.05),0.5%(P<0.05) and 0.1% (P>0.05),respectively;The activities of pectinase were decreased by 12.0%,11.0% and 2.8%(P<0.01),respectively;The activities of amylase were increased by 12.2%,15.3% and 19.9%(P<0.01),respectively;The activities of protease were decreased by 22.1%,48.0% and 22.2%(P<0.01),respectively.The correlation coefficients (R2) of the activities of the endocellulase,exocellulase and cellobiose with voluntary intake of sheep were 0.994,0.897 and 0.901.It was concluded that when the low dose of formalin was orally administrated the voluntary intake of sheep was increased,whereas the high dose of formalin or fauna-free was decreased;The factors determined the voluntary intake of sheep were the activities of endocellulase,exocellulase and cellobiose,rather than the numbers of the protozoa,bacteria or fungi,or the activities of other digestive enzymes in rumen fluid.

Key words: formalin; fauna-free; sheep; rumen

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