不同硒水平下牛维生素E消化率的测定

选用5岁、平均体重为500 kg的西门塔尔阉牛3头,以玉米青贮和精料补充料为基础饲粮,采用3×3拉丁方设计,在饲粮中分别添加硒0.1、0.2和0.3 mg· kg-1和维生素E 30、60和90 U.kg-1,共9组,硒水平（mg·kg-1）/维生素E水平（U·kg-1）分别为0.1/30（1组）、0.2/30（2组）、0.3/30（3组）、0.1/60（4组）、0.2/60（5组）、0.3/60（6组）、0.1/90（7组）、0.2/90（8组）、0.3/90（9组）,研究在饲粮中添加不同水平的硒对维生素E表观消化率的影响.结果表明,处理8和9组极显著高于2和4组（P＜0.01）,显著高于1、3、5和7组（P＜0.05）；1、3、5、6和7组显著高于2和4组（P＜0.05）.3、6和7组的GOT活性显著高于其余组（P＜0.05）.3和6组的GPT活性极显著高于1组（P＜0.01）,显著高于2、4、5、7、8和9组（P＜0.05）；2、4、5、7、8和9组显著高于1组（P＜0.05）.3、6和9组的GSH-Px活性极显著高于1、4和5组（P＜0.01）,显著高于2、7和8组（P＜0.05）；2、7和8组显著高于1、4和5组（P＜0.05）.研究表明,不同硒水平极显著影响牛维生素E消化率.

Measurement of Vitamin E Digestibility under Different Selenum Level in Cattle

Three Simmental steers（average body weight 500 kg, 5 year old） feeding basal diet consisting of corn silage and concentrate supplement which was added with 0.1, 0.2 and 0.3 mg Se and 30, 60 and 90 U VE per kg diet were used in a systematic 3x3 latin square design. Se （mg. kg-~）/VE （U. kg-~） level in the nine groups were 0.1/30 （group 1）, 0.2/30 （group 2）, 0..3/30 （group 3）, 0.1/60 （group 4）, 0.2/60 （group 5）, 0.3/60 （group 6）, 0.1/90 （group 7）, 0.2/90 （group 8） and 0.3/90 （group 9）, respectively. The nine groups were formed to study the effects of supplementa- tion of Se on VE digestibilities and blood biochemical indexes. The results showed that the digestibility of VE in group 8 and 9 were very significantly higher than that in group 2 and 4 （P〈0.01）, significantly higher than that in group 1, 3, 5 and 7（P〈0.05）. The digestibilities of VE in group 1, 3, 5 and 7 were significantly higher than that in group 2 and 4 （P〈0.05）. GOT activity in groups 3, 6 and 7 was significantly higher than other groups （P〈0.05）, GPT activity in groups 3 and 6 was very Significantly higher than in group 1 （P〈0.01）, was higher significantly than in groups 2, 4, 5, 7, 8 and 9（P〈0.05）, GPT activity in groups 2, 4, 5, 7, 8 and 9 was higher significantly than in group 1 （/9〈0.05）. GSH-Px activity in groups 3, 6 and 9 were very significantly higher than that in group 1, 4 and 5 （P〈0.01）, significantly higher than that in group 2, 7 and 8 （P〈0.05）. GSH-Px activity in group 2, 7 and 8 were significantly higher than that in group 1, 4 and 5 （P〈0.05）. The results indicated that different Se level has a very significant influence on vitamin E digestibility.