The effect of soybean meal fermented by Aspergillus usami on phosphor metabolism in growing pigs.

[Objective] The experiment aimed to check the pigs' digestive utilization of phosphor and other nutrient components in fermented soybean meal. [Method] 15 8-week old two-way cross growing pigs (average weight was 23.6 kg) were selected and divided randomly into 3 groups, 5 pigs per group. The method of total feces collection was adopted to compare the digestibility of phosphor and other nutrient components in growing pigs fed respectively by fermented soybean meal by Aspergillus usami and normal soybean meal. The experimental design were normal soybean group (NS group, P: 0.087%), fermented soybean meal group (FS group, P: 0.089%), normal soybean+ fermented soybean meal mixing group (MS group, P: 0.089%). [Result] The results indicated that the digestibility of growing pigs in FS group was significantly higher than that of NS group. Meanwhile, the digestibility of crude protein was significantly improved. [Conclusion] The above results indicated that Feeding with soybean meal fermented by Aspergillus usami not only could increase the digestibility of phosphor and protein, but also decrease the excretion of phosphor and nitrogen.