挤压加工和环膜制粒工艺对饲料氨基酸稳定性的影响

本文采用挤压加工和环模制粒工艺生产添加有晶体氨基酸(CAA)或微胶囊氨基酸(MAA)的水产颗粒饲料,研究2种加工过程对饲料CAA和MAA的损失,及其在水中的稳定性效果,旨在阐明挤压加工和环膜制粒工艺对饲料CAA和MAA稳定性的影响。结果表明,饲料加工对CAA和MAA的损失没有显著性差异(P>0.05),相比MAA,在饲料加工过程中晶体赖氨酸(C-Lys)和蛋氨酸(C-Met)分别多损失0.37%-8.02%和1.16%-4.29%；加工饲料的CAA在水中的损失较大,饲料水中浸滤60 min时,不同挤压温度饲料C-Lys比M-Lys多溶失23.99%-40.68%,C-Met比M-Met多溶失9.0%-13.5%；饲料水中浸滤120 min时,不同挤压温度饲料C-Lys比M-Lys多溶失24.42%-43.22%,C-Met比M-Met多溶失10.45%-17.47%。挤压温度的升高增加了氨基酸的热损失,但改善了饲料氨基酸在水中的溶失；MAA改善了CAA在饲料加工过程损失和水中的溶失。

Effects of extrusion processing and pelleting on stability of feed amino acids

In this paper, extrusion processing, pelleting production process added crystalline amino acids (CAA) or microcapsules aquatic feed pellets amino acid (MAA), to study the loss of the two kinds of processing feed CAA and MAA, and its stability in water sexual effect, seeks to clarify the impact of extrusion processing and the ring membrane pelleting process feed CAA and MAA stability. The results show that the loss of feed processing CAA and MAA no significant difference (P>0.05), compared to MAA crystal lysine in feed processing (C-Lys) and methionine (C-Met), respectively, more than the loss of 0.37 % -8.02% 1.16% -4.29%; the processing feed the CAA losses in the water, feed water leaching 60 min, the different extrusion temperature feed C-Lys and more soluble than the M-Lys lost 23.99% -40.68% C-Met than the M-Met multi dissolved lost 9.0% -13.5%; feed water leaching 120 min, feed C-Lys different extrusion temperature more than the M-Lys dissolved lost 24.42% -43.22% ratio of C-Met M-Met the multi-dissolved lost 10.45% -17.47%. The elevated extrusion temperature increase of the heat loss of the amino acid, but improved feed amino acid dissolved in the water loss; MAA improve the CAA feed processing losses and the loss of the water soluble.