春播早熟区玉米种子发芽期抗寒性的研究

为了研究低温处理对玉米种子萌发期间抗寒性影响，试验以适宜春播早熟区种植的8个玉米品种并单6号、并单16号、同玉158号、同玉162号、同单36号、长城799号、同玉229号、同单38号为材料．在8℃、10℃、15℃、20℃、25℃温度条件下对其发芽率、发芽势、苗高、苗色等特性进行了比较研究。结果表明：在8-25℃条件下发芽率、发芽势随温度的降低而降低；8个品种间存在差异，其中同玉158、并单6号和同玉162这3个品种的抗寒性强；8℃的低温处理有利于提高玉米种子的出苗整齐度、抗寒性和壮苗。

Study on Cold Resistance during Maize Seed Germination in Spring-sowing Early Maturing Area

In order to study low-temperature treatment＇s effect on the cold resistance of corn seeds during the germination period, 8 different corn breeds suited to be sown in early-maturing region were sown in spring, such as Bing Dan 6, Bing Danl6, Tong Yu158, Tong Yu162, Tong Dan 36, Chang Cheng799, Tong Yu 229, Tong Dan 38 as materials, the study of their germination rate, germination potential, seedling height, seedling health, and other germination characteristics being contrasted under the different temperatures of 8℃, 10℃, 15℃, 20℃ , 25℃ separately. The results demonstrate that germination rate and germination potential decrease as the temperature decreases when the temperature is between 8 - 25 ℃; there are differences among the 8 corn breeds： the cold resistance of Tong Yu 158, Bing Dan 6 and Tong Yu 162 is stronger; low-temperature treatment under 8℃ is good for enhancing the germination uniformity, cold resistance and seedling strength.