近几年小麦晚播面积逐年扩大,目前生产上普遍存在着收获过于偏晚的现象。据试验,早播比晚播相差25—30天,而成熟期只相差5—7天。因为晚麦选种的是早熟、春性强品种,一般具有生长快,所需积温少,春化时间短,发育早,起身拔节早,幼穗分化进程快,后期与最适宜播期的小麦基本一致。 In recent years, the area of ​​late broadcasts of wheat has been expanding year by year. At present, there is a widespread phenomenon that the harvest is too late. According to the test, the early sowing is delayed by 25-30 days than the late sowing, while the mature period is only 5-7 days. Because late wheat selection is precocious, spring strong varieties, generally have fast growth, less accumulated temperature, vernalization time is short, early development, rose early jointing, spike differentiation process fast, late and the most suitable sowing date wheat Basically the same.