Nutritional evaluation of two New Zealand cultivars of triticale (‘Aranui’ and ‘Karere’) using the rat, pig, and cockerel

摘要

Abstract The nutritional value of two recently developed New Zealand cultivars of triticale, ‘Aranui’ and ‘Karere’, was determined by chemical analysis of the grain and by animal feeding studies. Four trials were carried out using rats to determine protein quality, apparent digestibility of protein and amino acids, apparent digestible energy (ADE) and apparent metabolisable energy (AME), and the capacity of triticale to support growth of rats followed by postmortem examination of the carcasses. Pigs were used to determine ADE and AME, and cockerels were used to determine true metabolisable energy (TME). Protein quality, as assessed by amino acid analysis (i.e., amino acid score) and determined by the rat bioassay procedure of relative protein value (RPV), was not different between cultivars. Rat ileal apparent digestibilities of amino acids were also not different between cultivars except for methionine and arginine. The ADE and AME bioassays using the rat and pig, and the TME bioassay using the cockerel,...