山于去秋气温偏低,阴雨连绵,收获的种子含水量大,遇低温受冻,使胚脐的细胞及其内含物的组织结构遭受破坏,以致不能发芽。为了保证播种后茁全苗壮和节省种子和粮食,我们根据种粒外表受冻的症状,进行了种子发芽力的挑选,有较好的效果。例如:从发势率71％的门14玉米自交系中挑选出400斤,发芽率达到93％;从发芽率21％的1600斤威24自交系中挑选出600斤,发芽 Mountain in the autumn temperature is low, rainy, harvested seeds of large water content, cold in case of cryogenic, so that the embryonic umbilical cells and their contents of the organizational structure destroyed, so that can not germinate. In order to ensure vigorous seedling after sowing and to save seeds and grains, we conducted a selection of seed germination according to the symptom of freezing of the grain appearance and had a good effect. For example, 400 jin of inbred lines of maize from gate 14 with a fatal rate of 71% were picked for germination at a rate of 93%; 600 jin of inbred lines of 1600 kg at 21% of germination rate were germinated