茶多酚和有效微生物对育成期水貂粪便污染物排放量的影响

为研究饲粮中添加茶多酚(TP)和有效微生物(EM)对育成期水貂粪便污染物排放量的影响,试验选取400只育成前期水貂共160笼,随机分成8组,每组20个重复。采用两因素试验设计,共8个处理组,基础饲粮中分别添加0 EM+0 TP、0 EM+0.05%TP、0 EM+0.1%TP、0 EM+0.2%TP、200 mg/kg EM+0 TP、200 mg/kg EM+0.05%TP、200 mg/kg EM+0.1%TP、200 mg/kg EM+0.2%TP。预试期1周,正试期8周(前4周为试验I期,后4周为试验Ⅱ期)。结果表明:饲粮添加TP不能减少水貂粪便NH3、H2S和CO2生成量;饲粮添加200 mg/kg EM对水貂粪便NH3(48 h)、H2S(72 h和96 h)生成量有显著影响(P0.05);饲粮添加0.1%及0.2%TP可显著降低试验Ⅱ期粪便中氨氮含量(P0.05),饲粮添加200 mg/kg EM可降低粪便中总氮(试验I期)、总磷(试验I和Ⅱ期)、氨氮和亚硝酸盐氮(试验Ⅱ期)含量(P0.05)。由此可见,饲粮添加EM可以减少水貂粪便恶臭气体生成以及粪便污染物的含量,建议水貂饲粮中添加200 mg/kg EM。

Effects of Tea Polyphenols and EM on Fecal Pollutant Emission of Growing Minks

The experiment was conducted to determine the effects of tea polyphenols(TP) and effective microorganism(EM) on fecal pollutants emission of growing minks. A total of 400 growing minks were randomly divided into 8 groups with 20 replicates in each group. The two-factors cross experimental design was adopted, there were 8 groups in the present experiment including 0 EM + 0 TP, 0 EM + 0.05% TP, 0 EM + 0.1% TP, 0 EM + 0.2% TP, 200 mg/kg EM + 0 TP, 200 mg/kg EM + 0.05% TP, 200 mg/kg EM + 0.1% TP, 200 mg/kg EM + 0.2% TP, respectively. The pre-test period lasted for a week and the experiment period lasted for eight weeks. The results showed as follows: TP had no effects on reducing the NH3, H2 S and CO2 concentration of minks feces. EM had significant effects on the NH3(at 48 h time point) and H2 S(at 72 h and 96 h time points) concentration of mink feces(P<0.05). Supplement of 0.1% and 0.2% TP could significantly decrease the ammonia nitrogen content during period Ⅱ(P<0.05). EM could significantly decrease the total nitrogen(periodⅠ), total phosphorus content(period Ⅰ and Ⅱ), as well as ammonia nitrogen and nitrite-nitrogen content(periodⅡ) in feces during period Ⅱ(P<0.05). It could be concluded that EM could reduce the odor concentration and pollutants content of mink feces. In conclusion, the recommended supplementation was 200 mg EM per kilogram diet.