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The effect of heat treatment on ileal amino acid digestibility of growing broilers given vetch and bitter vetch meals

Published online by Cambridge University Press:  02 September 2010

I. Fernández-Fígares ,
L. Pérez ,
R. Nieto ,
J. F. Aguilera  and
C. Prieto
I. Fernández-Fígares
Affiliation:
Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
L. Pérez
Affiliation:
Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
R. Nieto
Affiliation:
Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
J. F. Aguilera
Affiliation:
Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
C. Prieto*
Affiliation:
Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
*
†To whom all coresspondence should be addressed
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Abstract

Forty-eight 4-week-old White Rock growing chickens (mean live weight 500 (s.e. 9·3) g) were given, by crop intubation, four isoencrgetic (13·1 M] metabolizable energy (ME) per kg dry matter (DM)) and isonitrogenous (120 g crude protein (CP) per kg DM) semisynthetic diets based on vetch (V) or bitter vetch (B) seeds, untreated or antoclaved at 120°C for 30 ruin (diets V, AV, B and AB, respectively). Autoclaving of the seeds caused some changes in amino acid (AA) composition but did not reduce the availability of A As, especially of lysine.

The average apparent AA digestibility values derived from ileal content were 0·75, 0·85, 0·59 and 0·85 for diets V, AV, B and AB, respectively, corresponding to true absorption values of 0·90, 1·00, 0·74 and 0·97, respectively. Although the apparent digestibility values of several AAs were relatively low (methionine, isoleucine, tyrosine and cystine), most were higher than 0·70. Heat treatment resulted in a significant increase (P < 0·05) in the AA apparent digestibility of both seeds. It is concluded that heat treatment is useful for improvement of vetch and bitter vetch seeds for inclusion in poultry diets.

Keywords

amino acidsdigestibilityheat processinglegume seedspoultry
Type
Research Article
Information
Animal Science , Volume 60 , Issue 3 , June 1995 , pp. 493 - 497
Copyright
Copyright © British Society of Animal Science 1995

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