(1)在济南条件下,由于年份及品种的不同,一般的说,冬小麦的播种时期应在秋分以后到霜降以前的时间内,过早过迟均非所宜。如果由于早、涝等灾害以及其他原因而不能适期播种时,也应争取早播;播种越迟,单位面积产量越低。②同一品种在不同时期播种,由于外界条件的不同,对于种籽的萌发,幼苗出土的快慢,植株的生长发育,以及病虫害的情况等均有显著的不同。不同品种对于外界条件也表示了不同的反应。(3)在济南条件下,冬小麦不能进行春播和夏播的主要原因,乃为植株不能順利地通过春化阶段发育,常受夏季高溫的影响以及严重地遭受各种銹病(特别是稈銹病)危害的缘故。 (1) Under the conditions of Jinan, due to the difference of the year and the varieties, it is generally said that the sowing date of winter wheat should not be used too late after the autumnal equinox to the time before the frost drop. If due to early, floods and other disasters and other reasons can not be sown properly, should also strive for early sowing; planting the later, the lower the yield per unit area. ② The same species sown at different times, due to the different external conditions, the germination of seed, the speed of seedlings unearthed, the growth and development of plants, as well as the situation of pests and diseases are significantly different. Different varieties also expressed different reactions to external conditions. (3) The main reason why winter wheat can not be sowed in spring and summer in Jinan is that plants can not develop smoothly through the vernalization stage and are often affected by summer heat and severely suffer from various rust diseases (especially stem rust) Hazard’s sake.