Inter-relationships between chemical constituents, rumen dry matter and nitrogen degradability in fresh leaves of multipurpose trees
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Title |
Inter-relationships between chemical constituents, rumen dry matter and nitrogen degradability in fresh leaves of multipurpose trees
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Creator |
Nsahlai, I.V.
Siaw, D.E.K.A. Umunna, N.N. |
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Subject |
browse plants
chemical composition nitrogen drymatter content degradability rumen food science biotechnology |
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Description |
This work determined the inter-relationships between constituents, rumen dry matter (DM) and nitrogen (N) degradabilities of fresh leaves from 20 multipurpose tree (MPTs) accessions belonging to the following genera: Acacia(2), Cajanus (2), Chamaecytisus (2), Erythrina (2), Leucaena (8) and Sesbania (4). Significant differences were observed among genera in all assayed chemical attributes except hemicellulose. There was apparently no disappearance of N in A saligna after the initial solubility. All genera had similar DM and N solubility but varied in degradation rate of DM, effective degradability of DM and effective degradability of N. Except for A saligna, synchronization indices of the release of nutrients for each accession ranged from perfect (0.93) to poor (-0.31) for soluble nutrients and from moderate (0.75) to very poor (-0.81) for insoluble slowly degradable nutrients because N was in excess. Inter-relationships among chemical constituents, DM and N degradation constants were established using correlation and regression analyses. Negative correlation occured between N solubility and proanthocyanidins, N degradation rate and hemicellulose and either NDF or hemicellulose or PAs, while N degradation rate was positively correlated with N content. Equations for predicting N degradability characteristics were set. Practical implications of DM degradability and nutrient release synchrony indices in relation to basal roughage intake and microbial protein synthesis were discussed. It was concluded that a mixed model could adequately predict N degradability of fresh forages and alleviate analytical cost. A functional approach of classifying browses is outlined.
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Date |
1995-10
2013-06-11T09:22:31Z 2013-06-11T09:22:31Z |
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Type |
Journal Article
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Identifier |
Journal of the Science of Food and Agriculture;69(2): 235-246
0022-5142 https://hdl.handle.net/10568/29123 https://doi.org/10.1002/jsfa.2740690214 |
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Language |
en
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Rights |
Copyrighted; all rights reserved
Limited Access |
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Format |
p. 235-246
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Publisher |
Wiley
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Source |
Journal of the Science of Food and Agriculture
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