The Multivariate Analysis of Foliar Fertilization by Using Random Forest for Improving Alliin Concentration of Garlic (Allium sativum l.)

This study was for analyzing significance and optimum proportion of components in foliar fertilizer, which aimed on improving alliin concentration of garlic (Allium sativum l.) in field condition. The Study with designed experiments implemented with uniform experimental design method U30 (3013) (D=0.1926). Alliin concentration from garlic clove was measured by HPLC, the analysis of data set engaged by Random Forest for components significance test and optimal formula calculation. The results shown that the RF is an appropriate choice for this kind of study; the top 3 important components of foliar fertilizer were: Glutathione, Ethanethiol and Mg2+; the application of foliar fertilizer with optimal combination of components had significant effects on improving alliin concentration in garlic clove; there was synergistic interaction between components, combination of different elements can get much better effects. The maximal data of alliin concentration in garlic clove from experiment results obtained 3.5% (mg/g) of fresh weight far more than control 1.5%