Identification Test of Density-tolerant Property for Two New Varieties of Early Maturing Maize in Heihe Area

In order to select the suitable planting maize varieties in Heihe area,taking two new maize varieties as experiment materials,some characters of two varieties under different densities in different years were analyzed,while yield was analyzed under different planting densities.The results showed that two varieties with increasing of the planting density,different growing periods of maize would be delayed for 1to 2days.With the inereasing of density,there was no difference in period of growth and development,plant height and spike height.Suitable planting density of Demeiya was 90 000plants·hm-2;Suitable planting density of Biandan 3was 75 000plants·hm-2.