赵国琦;贾亚红;陈小连;孙龙生;
ZHAO Guo-qi*,JIA Ya-hong,CHEN Xiao-lian,SUN Long-sheng(College of Animal Science and Technology,Yangzhou University,Jiangsu Yangzhou 225009,China)

• 1:扬州大学动物科学技术学院
• 2:扬州大学动物科学技术学院
• 3:扬州大学动物科学技术学院
• 4:扬州大学动物科学技术学院 江苏扬州225009

摘要(Abstract)：

利用4只(35±2.5)kg装有瘤胃瘘管的徐淮白山羊,采用拉丁方试验设计,饲喂NDF/NFE分别为1.46(A组)、1.2(5 B组)、1.0(3 C组)、0.8(2 D组)的4种日粮,研究其对瘤胃内环境参数的昼夜动态变化规律的影响。结果表明:①瘤胃pH随NDF/NFE的降低而降低,由A组的6.37降至D组的5.86;②乙酸浓度以B组最高,极显著(P<0.01)高于A、C和D组,A、C、D 3组则依次降低(P>0.05);丙酸浓度以B、D两组较高,极显著(P<0.01)高于A和C组;丁酸浓度随NDF/NFE降低而升高,D组最高,极显著(P<0.01)高于C和B组;总VFA浓度B组最高,极显著(P<0.01)高于D组,显著(P<0.05)高于A、C组;乙酸/丙酸比随NDF/NFE比的降低而减小,A组极显著(P<0.01)大于B、C和D组;③瘤胃氨态氮平均浓度随日粮NDF/NFE比的降低而升高,由A组的8.37mg/dL升至D组的13.71mg/dL。
Four Xuhuai goats fitted with rumen fistulae were used in a 4×4 latin square design to determine the effects of different neutral detergent fiber to N-free extract ratios(NDF/NFE) on the ruminal internal environment parameters.The NDF/NFE were 1.46(A),1.25(B),1.03(C),0.82(D),respectively.The results showed that: ①Decreasing NDF/NFE decreased ruminal pH.The average pH decreased from 6.37 in group A to 5.86 in group D;②The highest acetate concentration was observed in group B,much higher than that in group A,C and D(P < 0.01),in which concentration decreased orderly(P > 0.05).Propionate concentrations were higher in group B and D than that in group A and C(P < 0.01).Butyrate concentration increased orderly from group A to D.That in group D was much higher than that in group B and C(P < 0.01).The level of total volatile fatty acids(TVFA) in group B was much higher than that in group D,A and C.Acetate to propionate ratio(C2/C3) decreased orderly as NDF/NFE ratio decreased.There were no significant differences among group B,C and D except for A;③Lower NDF/NFE increased ammonia-N(NH3-N) concentration,which increased from group A to group D.

关键词(KeyWords)： 畜牧学;瘤胃;pH值;挥发性脂肪酸;氨态氮;山羊
animal science;rumen;pH;VFA;ammonia-N;goat

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(编号:30371039);; 江苏省自然科学基金(编号:BK99094)

作者(Authors): 赵国琦;贾亚红;陈小连;孙龙生;
ZHAO Guo-qi*,JIA Ya-hong,CHEN Xiao-lian,SUN Long-sheng(College of Animal Science and Technology,Yangzhou University,Jiangsu Yangzhou 225009,China)

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