2002年小麦生育期间,气候反常,出现了多年罕见的暖冬暖春现象,致使小麦生育期提前;生育中期降水偏少,旱象严重,株高降低,分蘖成穗率小;穗分化中后期遭受2次晚霜冻害,小穗数明显减少;灌浆初期阴雨连绵,光照不足,小穗成粒少;灌浆后期光照充足,日较差大,干热风出现迟,强度弱,对粒重增加十分有利。 During the period of wheat growth in 2002, the climate was abnormal and there was a rare phenomenon of warm winter and warm spring, which led to earlier growth period of wheat, less precipitation during mid-growth period, severe drought situation, lower plant height and smaller panicle tillers. The number of frost damage and spikelet decreased obviously on the second night. The early filling stage was rainy and continuous, the light was insufficient, and the spikelets were less granulated. The light intensity was sufficient at the later stage of grouting, the dry and hot wind appeared late and the intensity was weak.