The corn plants are pretreated by wet digestion methods,in which the zinc,copper,lead,chrome,cadmium in the digesting aqua of the contaminated plant are analyzed by the flames atomic absorption spectrophotometry.

A method for determination of the residue and degradation dynamics of MCPA in maize plant,grain and soil was described.

Low-phytic-acid maize has breeded as a new varieties in recent years.

Based on the analysis of 7 climate factors of meteorological data for 30 years from 108 meteorological stations in Shanxi,the ordination and regionalization of corn-growing regions in Shanxi were studied by principal component analysis(PCA) and GIS.