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The voluntary intake and digestibility of straw diets and the performance of wether sheep as influenced by formaldehyde treatment of soya-bean meal

Published online by Cambridge University Press:  02 September 2010

J. P. Alawa  and
R. G. Hemingway
J. P. Alawa
Affiliation:
Animal Husbandry Department, Glasgow University Veterinary School, Bearsden, Glasgow G61 1QH
R. G. Hemingway
Affiliation:
Animal Husbandry Department, Glasgow University Veterinary School, Bearsden, Glasgow G61 1QH
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Abstract

In two experiments, straw diets were supplemented with a concentrate mixture containing either untreated or formaldehyde-treated soya-bean meal. In experiment 1, adult wether sheep were given straw/concentrate mixtures in a 3:1 ratio (air-dry basis) in restricted amounts. In experiment 2, these proportions were adjusted to 3:2 and the growing lambs were offered straw at proportionately 0·05 to 0·1 greater than that eaten daily.

In experiment 1, formaldehyde treatment of soya-bean meal depressed apparent nitrogen (N) digestibility (P < 0·001) although diet organic-matter digestibility was not affected. Formaldehyde treatment also tended to reduce N retention in experiment 1, whereas with growing lambs in experiment 2, it led to improved N retention. Plasma urea concentrations were reduced as a result of formaldehyde treatment of soya-bean meal. Digested N was more efficiently utilized by sheep given the treated soya-bean meal diet in experiment 2 but not in experiment 1. Lambs given the treated soya-bean meal diet tended to gain more live weight with marginally superior food conversion ratios while consuming similar amounts of dry matter as those given the untreated soya-bean meal-supplemented diet.

Type
Research Article
Information
Animal Production , Volume 42 , Issue 1 , February 1986 , pp. 105 - 109
Copyright
Copyright © British Society of Animal Science 1986

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References

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