Abstract:

Heilongjiang Province is located in the northern part of Chinese early-maturing maize region. The yield and the quality of maize are all lower, the primary factors are that, the frostless season is short and the heat resource is not enough. Selecting the varieties of higher yield and lower grain moisture content is the best channel to solve this contradiction. Through analysis of variance and the analysis of correlation of the grain milking rate, the gain dehydrating rate, the grain moisture content and yield within 10 varieties. The results showed that there was difference in grain milking rate at different milking stage of cultivars. ‘Sidan19’, ‘Dongnong250’ and ‘Jidan27’ milked faster at early filling stage than the other test cultivars and ‘Nendan10’, ‘Xingken3’, ‘Nendan11’ milked faster at late filling stage than the other test cultivars. And there was difference in grain dehydrating rate at each filling stage. ‘Sidan19’, ‘Dongnong250’, ‘Jidan 27’, ‘Nendan10’ dehydrated faster than the other cultivars in the test and had lower grain water content. And these hybrid varieties have been evaluated synthetically. It will provide the science basis for planting fine varieties of maize.