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试验采用64只雄性SD大鼠随机分为对照组、普洱茶低剂量组、普洱茶中剂量和高剂量组,每组16只,分别饮用纯净水、0.5,2和4 g/(kg BW)的普洱茶茶汤。进行8周的饲养试验,在第28 d和第56 d每组分别屠宰8只,测定饲料、血浆、骨骼和粪中钙、磷含量,并计算钙、磷的表观消化率,研究普洱茶对大鼠钙磷吸收利用的影响。试验结果为:第28 d,中剂量组骨中钙含量显著高于对照组和低剂量组(P<0.05),高、低剂量组骨磷的含量显著低于对照组(P<0.05)。第56 d,在血钙含量、日粮中钙的表观消化率的比较中,低、中剂量组显著低于普洱茶高剂量组和对照组(P<0.05);在骨钙、磷的比较中,低剂量组显著高于高剂量组和对照组(P<0.05)。试验结果表明饮用中、低剂量普洱茶可增加日粮钙的排出,使日粮中钙的表观消化率降低,从而使日粮钙的吸收利用减少,增加骨钙的含量,饮用普洱茶不会导致骨钙流失。
Sixty-four male Sprague-Dawley rats were randomly divided into control group, low-dose Pu’er tea group, medium-dose and high-dose Pu’er tea group, 16 rats in each group, drinking pure water, 0.5, 2 and 4 g / Pu’er tea tea. Eight-week-old feeding experiment was conducted. Eight pigs were slaughtered on the 28th day and the 56th day respectively. Calcium and phosphorus contents in feed, plasma, bone and excrement were determined. Apparent digestibility of calcium and phosphorus was calculated. On the absorption and utilization of calcium and phosphorus in rats. The results showed that the bone calcium content of middle-dose group was significantly higher than that of control group and low-dose group on the 28th day (P <0.05), while that of high-dose and low-dose group was significantly lower than that of the control group (P <0.05). On the 56th day, the apparent calcium digestibility of dietary calcium was significantly lower than that of the high-dose and high-dose Pu-erh tea groups (P <0.05) The middle and low dose groups were significantly higher than the high dose group and the control group (P <0.05). Test results show that drinking medium and low doses of Pu’er tea can increase dietary calcium excretion, so that the apparent digestibility of dietary calcium decreased, so that dietary calcium absorption and utilization to reduce and increase the content of bone calcium, drinking Pu’er tea is not Will lead to loss of bone calcium.