为研究水提紫甘薯色素废渣对大鼠的减肥作用，以不同剂量给受试物经口灌胃，结果表明：各组动物日平均摄食量无统计学差异（P>0.05）。模型组与空白组TG、TC存在统计学差异（P<0.01），各剂量组TG、TC低于模型组，TG较模型组分别降低0.30 25.4%、19.5%和36.4%，TC较模型组分别降低14.4%、14.8%和20.1%。阳性组、中、高剂量组体重低于模型组，中、高剂量组终末体重较模型组分别降低10.9%、9.7%，总增重较模型组分别降低25.4%、26.9%。阳性组、中、高剂量组体脂重量低于模型组，分别降低24.8%、20.6%、21.6%。阳性组、低、中、高剂量组脂/体比与模型组相比，有下降趋势，但无统计学差异（P>0.05）。本试验结果说明水提紫甘薯色素废渣具有减肥作用。

The weight reducing function of waste residue of purple sweet potato was investigated by intragastric administration of SD rats. Under the condition of no significant difference (P>0.05) of intake food between model group and control, the results showed that there were significant differences between model group and control group on TG and TC(P< 0.01). The each level of dose values of control group’s TG and TC were lower than model group (P<0.05). TG respectively decreased by 25.4%, 19.5% and 36.4% compared to the model group and TC respectively decreased by 14.4%, 14.8% and 20.1% compared to the model group. The terminal weights of moderate dose group and high dose group respectively decreased by 10.9 % and 9.7 % compared to the model group. The totally incremental weight of moderate dose group and high dose group respectively decreaced by 25.4% and 26.9% compared to the model group. The body fat of positive group, moderate dose group and high dose group were lower than model group (P<0.01), which respectively decreased by 24.8), 20.6%and 21.6%. The decrease trend of the fat body ration was found in positive group, low dose group, moderate dose group and high dose group, however all kinds of trends were non significant when they compared with model group (P> 0.05). The weight reducing function of remaining waste residue of purple sweet potato was proved.

云南省科技计划项目（2008ZC107M）