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KMID : 0613820080180111521
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Journal of Life Science
2008 Volume.18 No. 11 p.1521 ~ p.1531
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Effect of Feeding By-product of Pleurotus eryngii in Pigs on Pork Quality
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Lee Soo-Jung
Kang Min-Jung
Chung Mi-Ja
Lee Hyun-Uk
Seo Jong-Kwon
Sung Nak-Ju
Shin Jung-Hye
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Abstract
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After pigs was fed by commercial diets supplemented with various concentrations (0, 0.5, 1, and 1.5%) of the fermented mushroom by-product of Pleurotus eryngii, the meat qualities and the serum lipid compositions of the individual pig groups were investigated. The levels of total lipid, total cholesterol, and triglyceride in the serum were significantly lower when the pigs were fed with the diet supplemented with 1.5% fermented mushroom by-product than those of the control pigs. HDL-, LDL-, and VLDL-cholesterol contents in the serum exhibited no significant difference between the pig group fed by the diet containing the fermented mushroom by-product and the control group. In comparison to the control group, the pig group fed by the diet supplemented with 1.5% fermented mushroom by-product showed significantly lower level of AI, CRF, GOT, and LDH values in the serum, whereas the difference in the level of antioxidant activity of the serum was not significant. Sensory evaluation regarding color, off-flavor, tenderness, juiciness, and overall acceptability also showed that the pork from the pig group fed by the diet supplemented with the fermented mushroom by-product (0.5～1.5%) was better than that from the control group. Although enhancement in the lightness (L*) value of the pork was significant in 20 days of storage at 4℃, the redness (a*) value was not significantly differential during the storage periods regardless of the supplementation of the fermented mushroom by-product into the diet. The cooking loss of the pork from the pig group fed by the diet supplemented with the fermented mushroom by-product (1% and 1.5%) decreased in the storage 10 days, but it increased in the storage 20 days. After storage for 20 days at 4℃, shear force of the pork obtained from the pigs fed by the diet supplemented with 1%～1.5% fermented mushroom by-product appeared to become significantly lower than that of the control. There were, however, no significant changes between two groups in the level of moisture content, crude lipid, and pH during the storage period. Although the TBARS content was enhanced in all groups during the storage period, the enhancement appeared to be more significant in the pork from the pig group fed by the diet containing the fermented mushroom by-product in comparison to the control. On the other hand, the ratio of UFA/SFA for the pork obtained from the individual pig groups showed no considerable diet-associated alterations during the storage period.
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KEYWORD
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Fermented mushroom by-product, Pleurotus eryngii, feed, fatty acid, pork quality
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