Efficacv of the fermented soybean meal with high phytase activity on phosphorus availability in monogastric animals.

在第一个试验中，生长猪饲喂豆粕日粮(SBM)、发酵豆粕日粮(FSBM)和添加无机磷的发酵豆粕日粮(SBM+P)，并对其矿物质利用率进行了研究。FSBM组的表观吸收率高于其他组。SMB组和SBM+P组的表观磷吸收差异无统计学意义。发酵对铜的利用率没有影响。然而，FSBM组显示出比其他组更高的股骨锌和肝脏铁浓度。这些结果表明，发酵降解了豆粕中的植酸盐，从而提高了这些矿物质的利用率。在第二个试验中，生长猪饲喂以SBM为基础的日粮、以FSBM为基础的日粮和以脱脂奶(SM)为基础的日粮，以研究小肠对钙的吸收和肠道中的离子钙浓度。SBM组和FSBM组的钙吸收低于SM组。SBM组和FSBM组十二指肠和回肠组织中钙离子浓度也低于SM组。这些结果表明，大豆日粮通过减少小肠中的离子钙而抑制钙的吸收。此外，SBM中的植酸盐不影响钙的吸收和小肠消化液中离子钙的浓度。

In the first experiment, growing pigs were fed a soybeam meal-based diet (SBM), a fermented soybean meal-based diet (FSBM) or a SBM-based diet supplied inorganic phosphate (SBM+P) and mineral availability was investigated. The apparent absorption rate was higher in the FSBM group than in the other group. The apparent phosphorus absorption did not differ between the SMB group and the SBM+P group. The fermentation did not affect copper availability. However, the FSBM group showed higher concentrations of femoral zinc and liver iron than did the other groups. These results indicated that the fermentation degraded phytate in soybean meal, which resulted in the improvement of these mineral availabilities. In the second experiment, growing pigs were fed a SBM-based diet, a FSBM-diet or Skim milk (SM)-based diet to study the absorption of calcium and ionized calcium concentration in the digesta of small intestine. Calcium absorption was lower in the SBM and the FSBM groups than in the SM group. The concentration of ionized calcium in duodenal and ileal digesta was also lower in the SBM and the FSBM groups than in the SM group. These results suggested that soy-based diets suppressed calcium absorption through reducing ionized calcium in the small intestine. Additionally, phytate in SBM did not affect calcium absorption and the concentration of ionized calcium in the digesta of the small intestine.