不同来源糙米添加外源酶对断奶仔猪磷消化率的影响

Effects of Different Sources of Brown Rice Supplemented by Exogenous Enzymes of Weanling Pigs

选用6头体重(12.5±0.60)kg的健康阉公猪,在回肠末端安装“T”型瘘管后,按6×6拉丁方设计,分别饲喂当年糙米和陈化糙米,并在其基础上添加外源酶组合1,组合2和不添加外源酶共计6种试验日粮,研究不同来源糙米添加外源酶对断奶仔猪磷消化率的影响.结果表明,糙米来源及其添加外源酶和酶组合对断奶仔猪回肠末端和粪的磷表观消化率和真消化率及植酸磷的降解率均无显著影响.回肠末端和粪的磷真消化率比表观消化率分别高13.90%和12.41%.回肠末端和粪的磷真消化率没有差异.粪的植酸磷降解率极显著低于回肠末端植酸磷的降解率.大肠对外源磷的吸收不起主要作用.

To investigate the effects of different sources of brown rice supplemented by exogenous enzymes on digestibility of phosphorus of weanling pigs, six healthy barrows, average initial body weight of （12.5 ± 0.60）kg, were fitted with a T-cannula and fed fresh and stored brown rice according to a 6 × 6 Latin square design. There were altogether six kinds of brown rice based diets with one supplemented by exogenous emzyme combination 1, one supplemented by exogenous emzyme combination 2 and the others not supplemented by any exogenous emzyme, respectively. The result suggests that sources of brown rice, different sources of brown rice supplemented by exogenous enzymes and exogenous emzyme combinations have no effect on apparent and true ileal and fecal phosphorus digestibility values and phytate phosphorus degradability values in weanling pigs. The true ileal and fecal phosphorus digestibility values are 13.90% and 12.41% higher than the apparent ileal and fecal phosphorus digestibility values, respectively. There were no differences in true P digestibility values betwecn the ileal and the fecal levels. The ileal phytate phosphorus degradability values are significantly lower than the fecal phytate phosphorus values. The large intestine does not play a major role in the absorption of exogenous phosphorus.