不同微量元素水平组合对维生素A稳定性的影响

通过采用均匀试验设计,在近似于生产的高温贮藏条件（37℃）下,以4%的仔猪预混料为对象,研究了仔猪预混料中不同水平组合的甲酸亚铁、碱式碳酸锌、碱式碳酸铜、硫酸锰（以下简称为＂新型微量元素组＂）对维生素A稳定性的影响,并在试验中增设2个对照组（不添加铁、铜、锰、锌对照组1和普通硫酸盐对照组2）。贮藏试验期60天。研究表明：（1）预混料中添加微量元素导致了维生素A的额外损失,随微量元素添加量的增加,维生素A的损失率也显著增加（P〈0.05）。（2）添加相同剂量的新型微量元素组对维生素A损失率的影响显著低于普通硫酸盐对照组（P〈0.05）。（3）各处理组中维生素A的最大损失率为56.53%。碱式碳酸铜是预混料贮藏过程中影响维生素A稳定性的主要因素。（4）铁与其它元素的交互作用对维生素A稳定性有破坏作用;高铜和高锌及两者互作极显著（P〈0.01）影响维生素A的稳定性。

Effect of Different Levels Trace Elements on the Stability of Vitamin A

Uniform design was adopted to investigate the infulence of ferrous formic acid,copper subcarbonate,zinc subcarbonate and manganese sulfate on the stability of vitamin A andmicotinamide in 4% piglets premix under condition of 37 ℃ during 60 d.Two affiliated contrast were added（Contrast I was sulfate group;Contrast II was not contained microelement）.The results indicated：（1）Under the condition of 37 ℃,microelement contained in premix induced to extra-loss of vitamin A and dose effect was existed（P0.05）.（2） Percent of loss of vitamin A in same dose ferrous formic acid,copper subcarbonate,zinc subcarbonate and manganese sulfate group was lower than sulfate group（P0.05）.（3）Maximum percent of loss of vitamin A was 56.53% in different groups.Copper subcarbonate was the main factor.（4）The interaction of iron and other elements of the destructive effects of the stability of vitamin A.High copper、high zinc and their interaction have the significantly effect on the stability of vitamin A（P0.01）.