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Fermentation kinetics of stems of sorghum and millet genotypes

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Title Fermentation kinetics of stems of sorghum and millet genotypes
 
Creator Zerbini, E.
Sharma, A.
Rattunde, H.F.W.
 
Subject GENOTYPES
SORGHUM
MILLETS
CHEMICAL COMPOSITION
 
Description Gas production profiles were obtained from in vitro fermentation of stems of six genotypes of sorghum and millet grown at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), India. The ranking of sorghum and millet genotypes by cumulative gas production was consistent throughout the 96-hour fermentation period. However, differences were proportionally greater during the initial 3 and 6h of fermentation.The multiphase model described by Groot et al. [Groot, J.C.J., Cone, J.W., Williams, B.A., Debersaques, F.M.A., Lantinga, E.A., 1996. Anim. Feed Sci. Technol. 64:77-89] was used to fit the in vitro fermentation gas observations of these substrates, and fermentation kinetics parameters were calculated using the fitted model. The final estimates of the model parameters (A, B, C), tested by varying the initial estimates obtained with the monophasic model by +/-50%, were stable, showing no dependence on the starting values of the model parameters. However, in millet stems, the C parameter has shown a tendency to converge near unity. The stability of the final values of the parameters of the model in this study suggests the potential applicability of the multiphase model when only nine gas observations over a period of 96h were available. However, the indeterminacy in the parameters of phase 1 for some millet stems indicates the need of an intermediate gas value between 0 and 3h.In both, sorghum and millet the asymptotic gas of the first phase (A1) was negatively correlated with NDF (r=-0.82, p
 
Date 2010-03-28T09:34:37Z
2010-03-28T09:34:37Z
1999-09-15
 
Type Journal Article
 
Identifier Zerbini, E.; Sharma, A.; Rattunde, H.F.W. 1999. Fermentation kinetics of stems of sorghum and millet genotypes. Animal Feed Science and Technology. 81(1-2): 17-34
0377-8401
https://hdl.handle.net/10568/939
 
Language en
 
Source Animal Feed Science and Technology