Effect of Stabilizing Process on the Preservation of Rice Bran, and the Dietary Supplementation of Stabilized Rice Bran on Growth Performance of Weanling Pigs
Date Issued
2015
Date
2015
Author(s)
Liao, Chih-Wei
Abstract
The objective of this study was conducted to understand the effect of thermal process on preservation of rice bran and dietary supplement of stabilized rice bran on growth performance of weanling pigs. This experiment was divided into two parts. Firstly we stabilized rice bran by different thermal process, including dry-extrusion, moist-extrusion, and pelleting. Processed rice bran samples were put into bags for storage stability evaluation at room temperature for 8 weeks. The free fatty acid content of rice bran did not increase because lipase activity was suppressed by thermal process with dry-extrusion having the biggest impact on the enzyme. However, the lipid oxidation (thiobarbituric acid value) of rice bran would increase with the raised thermal temperature. The total phenol content and DPPH scavenging ability decreased with increase of thermal temperature. Furthermore, the γ-oryzanol contents increased with longer storage time. Secondly, 48 weanling pigs were divided randomly into 3 treatments. There were three treatments which contained 0%, 4% and 8% of dry-extrusion stabilized rice bran in the diet. After 4 weeks of feeding, there were no significant differences in growth performance, triglyceride content and thiobarbituric acid value in blood among all treatments. Cecal digesta propionic acid concentrations decreased with stabilized rice bran supplementation. In conclusion, thermal stabilized process could prolong the shelf-life of rice bran. Diet contains up to 8% of stabilized rice bran did not seem to affect the growth performance of weanling pigs. Nevertheless, high fiber diet might cause diarrheal during first week after weanling, thus we suggest that rice bran can be added in the diet 2 weeks after weanling
Subjects
thermal process
stabilized rice bran
γ-oryzanol
weanling pig
antioxidative
SDGs
Type
thesis
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