Effect of processed maize stover as an alternative energy source in swine production

Abstract

In order to increase the nutritive values of maize stover, the processes of steam explosion and microbial fermentation with Aspergillus oryzae were used to produce processed maizestover (PMS). In the digestive experiment on swine it was shown that dietary digestible energy (DE) was decreased when PMS substitute rates for maize meal were increased from 5 to 15%(P < 0.05). In each of two-stage swine feeding experiment were 5 groups with 3 replicationsineach: Group 1-control, groups 2-4-diets supplemented with 5, 10 or 15% PMS, respectively(as a replacement of the same amount of maize meal), group 5-diet supplemented with 10% PMS with DE level the same as in the control group. It was indicated that average daily gain and nutrient digestibility were similar in groups with 0 and 5% PMS addition but were decreased when PMS addition increased from 5 to 15%. It can be concluded that the optimal levels ofPMS in diets were below 10% for younger pigs and 15% for older ones. PMS addition could helpto increase faecal enzyme activity and decrease swine diarrhoea rates. So, the insights that optimal PMS levels could relieve shortage of energy feedstuffs were provided in this study.