Degradation And Inhibition Of Fatty Acids In High Oil Corn Silages

High oil corn was chosen as materials, studying the changing process of fatty acid in its silages, and explored effective measures to improve the fatty acid concentration, especially the unsaturated fatty acid in silages. Six experiments were designed in this text, and the results were as follows:The concentrations and compositions of fatty acid in high oil corn at different growth periods were detected, and the results showed that, the dry matter accumulation of high oil corn after pollination continuously increased, the total fatty acid concentration and the percentage of linoleic acid in total fatty acid in whole plant corn were mainly from ear, and the maximal value both appeared in the42d after pollination.The dynamic changes of fatty acid during whole plant high oil corn ensiling was detected, and the results showed that, the total fatty acid concentration and the percentage of linoleic acid in total fatty acid decreased, whereas the percentage of saturated fatty acid increased, and all the significant difference appeared in the2-3d after ensiling.The effect of plant enzyme and microbes on fatty acid of whole plant high oil corn silages were detected, the results showed that, only when the plant enzyme was limited, higher concentration of total fatty acid and percentage of unsaturated fatty acid obtained, whereas the limitation of microbes had no difference compared with control.The effect of acetyl-CoA carboxylase on fatty acid of whole plant high oil corn silages were detected, the results showed that, when the acetyl-CoA carboxylase was limited totally, its total fatty acid concentration and composition were not different from control.The effect of lipase and LOX on fatty acid of whole plant high oil corn silages were detected, the results showed that, higher concentration of total fatty acid and percentage of unsaturated fatty acid obtained either these two enzyme limited alone or together, and the effect of LOX was higher.The effect of antioxidants on fatty acid of whole plant high oil corn silages were detected, the results showed that, adding antioxidants during ensiling could increase the fatty acid concentration and the percentage of unsaturated fatty acid, and the effect of TPP and TBHQ were better than other antioxidants in present study.Through the research, some conclusions could obtain, the losses of fatty acid during ensiling mainly due to the oxidative of unsaturated fatty acid by LOX, and the application of antioxidants could reduce this losses.