| Seeds of 62 different types of maize purchased in the market in 2015 were selected for testing.The rate of field emergence is a manifestation of seed vigor,mainly in the rate of seedling formation in the field.Seed germination rate is now widely used as a standard for seed vigor analysis.Therefore,this study takes the rate of field germination and cold germination rate as the standard,and analyzes the physical and chemical components of corn seed,which can provide reference for the production practice of maize breeding and seed processing.The main conclusions are as follows:1.standard germination test is used to determine the maximum germination potential of seed batch,our requirements for production of the standard germination rate in 85%,reached the standard of corn seed in 97%above,this study showed that the selected maize materials have good representation.2.the relationship between the 1000 grain weight,specific gravity and bulk density of corn seeds was not significant with field germination rate and cold resistant germination rate,indicating that the seed vigor size could not be directly determined by the thousand grain weight,specific gravity and bulk density.The width and projection area of the scanning characters were negatively correlated with field emergence rate and cold resistant germination rate at the 0.05 level,and the seed vigor increased gradually when the width and projection area decreased.The starch content and fat content of corn seeds were not significantly correlated with field germination rate and cold resistant germination rate,and could not be directly determined by starch content and fat content.The protein content of corn seeds was significantly correlated with field emergence rate and cold resistant germination rate,and the seed vigor increased gradually when the protein content increased.Physical properties with width scanning characteristics and projection area is reduced,the chemical composition with increasing protein content and moisture content,seed vigor will increase,can be used as reference for improving seed vigor. |
