Journal of Food, Agriculture and Environment

Vol 10, Issue 2,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Changes in chemical composition and in vitro fermentation characters of rice straw due to gamma irradiation


S. X. Tang 1*, K. Q. Wang 2 †, Z. H. Cong 1, 3, M. Wang 1, X. F. Han 1, C. S. Zhou 1, Z. L. Tan 1*, Z.H. Sun 1

Recieved Date: 2012-02-03, Accepted Date: 2012-05-04


This experiment was carried out to investigate the effects of different intensities of gamma irradiation (0, 500, 1000, 1500 and 2000 kGy) on chemical composition and in vitro fermentation characteristics of rice straw. The results indicated that, the gamma irradiation significantly decreased (P<0.001) the contents of OM, neutral detergent fiber (NDF) and acid detergent fiber (ADF) for rice straw. In particular, the higher dosage levels of gamma irradiation resulted in lower NDF than ADF in rice straw, thus yielding apparently negative hemicellulose value. The gamma irradiation intensities less than 1500 kGy had no significant effect on gas production of rapidly degradable fractions (FG), degradation rate of slowly degradable fractions (SD) and lag time (), but the irradiation intensities of 1500 and 2000 kGy increased (P<0.01) the values of FG and SD, and decreased (P<0.05) the value of L. Gamma irradiation increased (P<0.001) the in vitro organic matter disappearance (IVOMD) which increased from 44% to 64% . The current results implied that gamma irradiation might significantly change chemical compositions of rice straw (especially fiber fractions), and could improve IVOMD effectively, especially at high intensity level.


Rice straw, gamma irradiation, fermentation kinetics, chemical composition

Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 2
Category: Agriculture
Pages: 459-462

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