储藏时间对玉米原粮中脂肪酸组成影响的研究

本试验以2013年收获的“源玉3”和“先玉335”玉米原粮为试验对象，测定了玉米原粮中脂肪含量、脂肪酸组成及脂肪酸值随储藏时间的变化。并对完整籽粒和胚芽中的脂肪酸含量进行了比较分析。试验结果表明，在储藏270 d时间中，脂肪含量分别下降14.25%和12.19%。棕榈酸和硬脂酸含量呈先上升后下降趋势。油酸、亚油酸和亚麻酸含量呈下降趋势。五种脂肪酸含量在胚芽中所占比例略高于在完整籽粒中所占的百分比，但是脂肪酸含量变化规律保持一致，无显著差异。2014年4月1日后，在本试验模拟粮仓储藏条件下，应用玉米胚芽提取玉米油的玉米原粮的适宜储藏期不宜超过210 d，但并不影响玉米原粮的宜存品质。

Effects of storage time on fatty acid composition of maize

This paper mainly studied the changes of nutrients including fat, fatty acids and fatty acid value in maize (Yuanyu3 and Xianyu335) during storage. And fatty acid content of full grain and germ has carried on the comparative analysis. The results showed that fat showed a decreasing tendency and decreased by 14.28% and 12.19% respectively on the 270d of storage respectively. Palmitic acid and stearic acid increased first and then decreased. The content of oleic acid, linoleic acid and linolenic acid showed a decreasing tendency. Five kinds of fatty acid content in embryo, slightly higher than the proportion of the percentage of full maize, but the fatty acid content change rule, no significant difference. On April 1, 2014 in the experimental simulation granary storage conditions, The shelf life of the maize that be extracted corn oil should not be more than 210 d, but does not affect the appropriate storage quality of maize.