Application of activated charcoal as wood resources to animal feed additive

在精料饲喂条件下，研究了活性炭（AC）和日本雪松炭（JCC）对生长绵羊瘤胃和血液特性的影响。添加剂的剂量为饲料干物质的0.5%，饲料的水平为体重的2.6 - 3.0%。试验一采用三因子设计，试验二采用拉丁方设计。在第一次试验中，饲料转化率等生产性能指标没有差异，但AC组的增重有提高的趋势。各处理间瘤胃pH值差异不显著。AC和JCC组的氧化还原电位、原生动物数量和氨氮值有降低的趋势。AC组血糖、白球比、总胆固醇、硫代巴比妥酸有升高趋势。AC组CPK酶活性较对照组有降低趋势。GOT和γ-GTP活性以JCC组最高。Al-P活性从高到低依次为AC组、JCC组和对照组，但公母羔羊之间存在一定的差异。AC和JCC给药后，白色血细胞对淋巴细胞和中性粒细胞的分类比值发生变化，本研究以硫代巴比妥酸值、CPK、GOT、γ-GTP和Al-P活性作为AC和JCC对动物影响的指标。

The effects of oral administration of activated charcoal (AC) or Japanese Cedar charcoal (JCC) to growing sheep were investigated on ruminal and blood characteristics under concentrate-based feeding scheme. The additive was dosed at the rate of 0.5% of dry matter of feed which was offered at the level of 2.6 to 3.0% of body weight. The first experiment was carried out under three factorial design and the second one was done under Latin square design. In the first experiment, no difference was observed among production characteristics like feed conversion ratio, However, the body weight gain tended to be improved for AC group. There was no difference of ruminal pH among treatments. The values of oxidation-reduction potential, protozoa no. and ammonia nitrogen tended to be decreased for AC and JCC groups. The increased tendency of blood glucose and albumin/globulin ratio for AC and that of total cholesterol and thiobarbituric acid for JCC were observed. The enzyme activity of CPK in AC group tended to be lower than that of reference group. The activities of GOT and gamma-GTP tended to be higher for JCC group than those of the others. The Al-P activity was higher in the descending order of AC,JCC and reference groups, however, there was some differential tendency between male and female lambs. The white blood cell differential ratios were changed for lymphocyte and neutrophil after dosing AC and JCC.In the study, the thiobarbituric acid value and CPK,GOT,gamma-GTP and Al-P activities were the indicators of AC and JCC effect on animal.