Abstract:

This test studied the effect of low temperature on germination characters of seeds in different varieties of maize, which are ‘Zhengdan 958’, ‘Liaodan 565’, ‘Zhongdi 77’, ‘Yongyu 3’, ‘Shanxi 708’, ‘Shanxi 712’, ‘Yinhe 32’, ‘Jidan 198’, ‘Jiudan 48’, ‘Longdan 13’. We analyzed percentage of germination, water absorption, electrical conductivity, intracellular free proline content, starch content of different maize varieties under 5℃ and 25℃. Research results showed that different maize varieties of vigor at low temperature were different within 24 hours for seed water absorption, electrical conductivity, intracellular free proline content, starch content. After deal with low temperature, germination percentage of ‘Liaodan565’ was lower 5.34%, secondly was ‘Longdan 13’ and ‘Zhongdi 77’, which was lower 5.67% and 7%, respectively. The results showed that the antifreezing ability of the three varities were better, and suit for seeding in the district where cold damage was often happened such as Heilongjiang Province.