酶解棕榈仁粕肉仔鸡氨基酸营养价值的评定

Nutrient evaluation of amino acid in enzymatic palm kernel meal on broilers

本试验旨在研究经甘露聚糖酶酶解后的棕榈仁粕(PKM-2)、甘露聚糖酶和蛋白酶酶解后的棕榈仁粕(PKM-3)对肉仔鸡回肠氨基酸消化率的影响。选用192只体重相近的1日龄科宝肉仔鸡,随机分成4组(每组设8个重复,每个重复6只鸡,公母各半),分别饲喂PKM-1(未处理)、PKM-2和PKM-3配制的半纯合饲粮和无氮饲粮,在35日龄时收集肉仔鸡回肠后半段食糜进行测定。结果表明:(1)性别对肉仔鸡内源氨基酸基础损失量无显著影响(P>0.05);(2)PKM-2和PKM-3粗蛋白质和氨基酸(除半胱氨酸外)的表观回肠消化率极显著提高(P<0.01),除组氨酸和半胱氨酸外的标准回肠消化率极显著提高(P<0.01);PKM-3比PKM-2的蛋白质的表观回肠消化率提高2.66%,但差异不显著(P>0.05);PKM-2与PKM-3所有氨基酸标准回肠消化率差异均不显著(P>0.05)。综上所述,酶解后的棕榈仁粕蛋白质和大部分氨基酸消化率均有改善。

This experiment was conducted to study the effect of mannase enzymatic hydrolysis palm kernel meal（PKM-2）,protease enzymatic hydrolysis palm kernel meal（PKM-3） on ileal amino acid digestibility in broilers.A total of192 1-day-old Cobb broilers with nearly same weights were randomly assigned to 4 treatment groups.Broilers of experimental groups were fed semi-purified diets which consisted of three kinds of PKM and nitrogen-free diet.Ileal digesta of all broilers were collected at the age of 35 day.The results showed that：（1）There was no significant difference on the broilers of basis endogenous amino acid loss for sex（P 0.05）;（2）The apparentileal digestivility（AID） of crude protein and amino acids（without cysteine）in PKM-2 and PKM-3 were improved significantly（P 0.01）.The standard ileal digestibility（TID） of crude protein and amino acids（without histidine and cysteine）were improved significantly（P 0.01）.PKM-3 was higher 2.66% than PKM-2 protein AID,but there were no significant differences between PKM-2 and PKM-3（P 0.05）.There were no significant differences between PKM-2 and PKM-3 acids TID（P 0.05）.In conclusion,the digestibility of the protein and majority amino acid of enzymatic hydrolysis palm kernel meal was improved.