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http://dx.doi.org/10.5333/KGFS.2011.31.4.451

Studies on Fungal Contamination and Mycotoxins of Rice Straw Round Bale Silage  

Sung, Ha-Guyn (ADBIOTECH Co. LTD.)
Lee, Joung-Kyong (The Foundation of AG, Tech. Commercialization and Transfer)
Seo, Sung (National Institute of Animal Science, RDA)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.31, no.4, 2011 , pp. 451-462 More about this Journal
Abstract
The purpose of this study was to investigate fungi and mycotoxin contamination of the rice straw bale silage in Korean. It was tested the 33 samples of rice straw round bale silage with various condition which fed cattle in the farm. The level of fungal contamination was $2.1{\times}10^6\;cfu\;g^{-1}$ in the average and $9.2{\times}10^8\;cfu\;g^{-1}$ in the maximum. The fungal contamination was detected in the all of normal samples which good condition of rice straw bale silage. When the fungi was isolate and identify, it was found 28 species and mycotoxin producing fungi were 8 species as following as Aspergillus flavus, Aspergillus fumigatus, Fusarium culmorum, Fusarium verticillioides, Penicillium carneum, Penicillium paneum, Penicillium roqueforti, Penicillium viridicatum. Specially, Penicillium paneum was found 42% of samples and Aspergillus sp. (A. flavus, A. fumigatus) are 21% of samples. In case of mycotoxin contamination, the 42% of samples are detected more than one kind of mycotoxin. Some samples are contaminated three kinds of mycotoxin. This study was not found aflatoxin ($B_1$, $B_2$, $G_1$, $G_2$) and fumonisin ($B_1$, $B_2$), but were detected the contamination of ochratoxin A (1.0~5.8 ug/kg), deoxynivalenol (DON, 156.0~776.7 ug/kg) and zearalenone (ZON, 38.0~750.0 ug/kg). Therefore, the above results show that rice straw round bale silage expose on hazard factors as mycotoxigenic fungi and mycotoxin contamination, and than need more research about mycotoxin in animal feed to protect animal and human healthy.
Keywords
Fungi; Mycotoxin; Rice straw; Bale silage; Forage;
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