Evaluación de las características del fruto de huizache (Acacia farnesiana (L.) Willd.) para su posible uso en curtiduría o alimentación animal

Abstract

Huizache (Acacia farnesiana (L.) Willd.) is a wild species commonly distributed in Jalisco and other states of Mexico, which may be used as forage. A study was performed on the fruit of huizache (husk and seed) in both, untreated samples and samples with pre-extraction of tannin, for the determination of chemical proximal analysis (QPA), aminoacid profile, and in situ degradability, in fistulated pelibuey sheep specimens. Tannins were evaluated using the ALCA method and the Stiasny number technique. QPA analysis showed high protein content in raw seeds of 23,0%, higher than husk content which was 14,9%. Samples showed high concentrations of histidine, valine, threonine, leucine and isoleucine, but low concentrations of lysine and methionine+ cysteine. The tannins content was 9,7% of condensed type and 11,6% of tannin for tanning in husk, versus 1,8% and 2,2% in seed, respectively. The presence/absence of tannin had the greatest effect on the parameters studied. The most of the indicators in PQA decreased in samples without tannins. Seed with tannins showed 61,7% of neutral detergent fiber (NDF) and seed without tannin had 58,1%, for example. Tanninś extraction improved digestibility into the sheeṕs rumen.