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The contribution of chemical constituents of fodder tree and shrub leaves to gas produced during in vitro fermentation in nitrogen-free and nitrogen-rich media

  • M. Rosales (a1), M. Gill (a2), C. D. Wood (a2), D. Romney (a2), A. W. Speedy (a3) and J. Stewart (a3)...

Extract

In the tropics, fodder trees and shrubs are a very important source of nutrients, especially nitrogen. In vitro gas production methods used for food evaluation were originally developed for investigation of temperate forages and used a nitrogen-rich medium. Evaluation of fodder tree leaves in this medium may mask the effect of their nitrogen which it is important to understand. This trial studied the fermentation of a range of tropical fodder trees and shrubs in both nitrogen-rich and nitrogen-free media, in order to identify the main chemical entities contributing to gas production and the time within which such contributions were most important.

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Nsahlai, I. V., Siaw, D. E. K. A. and Osuji, P. O. 1994. The relationships between gas production and chemical composition of 23 browses of the genus Sesbania. Journal of the Science of Food and Agriculture 65: 1320.
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Theodorou, M. K., Williams, B. A., Dhanoa, M. S., McAllan, A. B. and France, J. 1994. A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds. Animal Feed Science and Technology 48: 185197.

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