气象因子对2002年小麦生产的利弊浅析

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，分薛成穗率小；穗分化中后期遭受2次晚霜冻害，小穗数数明显减少，灌浆初期阴雨连绵，光照不足，小穗成粒小，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。

Shallow Influence Analysis of Meteorological Factor to Wheat Production in 2002

During the period of winter wheat growth, climate was unusual, warm winter and warm spring phenomenon which is rare many years appeared, winter wheat grew ahead of schedule. During the period of middle growth, Sign of drought was serious because of the few precipitation, stem height fell and rate of tillering and becoming fringe reduced. During the metaphase and anaphase of fringe polarization, twice freezing disaster caused by late frost made number of spikelets obviously reduced. During the initial stages of fill plasm, wet weather and lack illumination small fringe result in turning grain rarely. During anaphase of fill plasm, plenitude illumination, daily range large, dry - hot wind appeared late and intensity feebleness, was fully propitious to increase the weight of grain.