摘要
利用大型动物开放式呼吸测热装置等设备,研究活性干酵母和纤维素酶对草原红牛瘤胃挥发性脂肪酸浓度及甲烷排放的影响。试验选用8月龄、体况相近的草原红牛公牛4头,采用4×4拉丁方试验设计分为4组:Ⅰ组为对照组,饲喂基础日粮,Ⅱ组在基础日粮中添加200mg/kg活性干酵母,Ⅲ组在基础日粮中添加190mg/kg纤维素酶,Ⅳ组在基础日粮中添加200mg/kg活性干酵母和190mg/kg纤维素酶,试验分4期,每期37d。结果表明,日粮中添加活性干酵母后,对瘤胃内丙酸浓度和总挥发性脂肪酸浓度影响显著(P<0.05),Ⅱ、Ⅳ组总挥发性脂肪酸浓度和丙酸浓度显著高于Ⅰ、Ⅲ组(P<0.05);活性干酵母显著抑制了草原红牛甲烷的产生(P<0.05),Ⅱ组甲烷排放量比Ⅰ组降低9.84%;纤维素酶对草原红牛瘤胃挥发性脂肪酸及甲烷排放的影响均不显著(P>0.05)。因此,日粮中添加活性干酵母能促进草原红牛瘤胃发酵,增加丙酸浓度,并显著降低甲烷排放,减少能量损失。
We utilized equipment of macrofauna open-type with respiration and calorimetric function to research effect of active dry yeast and cellulose enzymes on the concentration of rumen VFA and emission of methane in Grassland Red cattle. Four Grassland Red cattle with eight months,similar body condition were selected. We used 4×4 latin square method to complete this experiment. Group Ⅰ was fed the basal diet as the control group,group Ⅱ added 200 mg/kg active dry yeast in the basal diet,group Ⅲ added 190 mg/kg cellulose enzymes in the basal diet,group IV added 200 mg/kg active dry yeast and 190 mg/kg cellulose enzyme at the same time in the basal diet. The test was divided into four periods and every period included 37 days. The results showed that after adding active dry yeast in the diet, it had an obvious effect on concentration of propionic acid and total VFA （P〈0.05）. The concentration of total VFA and propionic acid in groups Ⅱ and IV had significant effect than that in groups Ⅰ and Ⅲ （P〈0.05）. Active dry yeast obviously restained the production of methane from Red Grassland cattle （P〈 0.05）, emission of methane from group Ⅲ was 9.84% and lower than group Ⅱ. The effect of cellulose enzymes on the concentration of rumen VFA and methane emission had no obviously difference （P〉0.05）. Therefore, active dry yeast could improve rumen fermentation, increase concentration of propionic acid, reduce emission of methane and energy loss from Grassland Red cattle.
出处
《中国畜牧兽医》
CAS
北大核心
2013年第2期57-61,共5页
China Animal Husbandry & Veterinary Medicine
基金
国家肉牛牦牛产业技术体系(CARS-38)资助
关键词
活性干酵母
纤维素酶
草原红牛
瘤胃发酵
挥发性脂肪酸
甲烷
active dry yeast
cellulose enzymes
Grassland Red cattle~ rumen fermentation
volatile fatty acid （VFA）
methane
