摘要
小麦植株开始拔节时,幼穗的分化发育出现转折——停育小穗出现,侧小穗数不再增加,顶小穗开始分化,全穗的总小穗数定型。顶小穗的形成过程、形态结构与侧小穗不同。顶小穗出现的早晚,与温、光、营养等条件密切相关。了解小麦顶小穗的形成特点,注意适期早播,正确施肥,科学管理,可以延长小穗分化时间,推迟顶小穗出现,增加小穗数,达到穗大粒多的增产目的。
The differentiation of the young spike of wheat reaches a turning point when thewheat plant begins to joint.At this point.“spikelets with ceased development”begin toappear,no more lateral spikelet will be differentiated,the apical spikelets begin to differen-tiate and the number of spikelets is fixed.The process of the formation of the apicalspikelet is totally different from that of the lateral spikelets.Whether it appears earlier orlater is closely related to temperature,day length and nutrition conditions.An under-standing of the formation characteristics of the apical spikelet in conjunction with timelyseeding.proper fertilization and scientific management will prolong the period of spikedifferentiation,cause later appearance of the apical spikelet and increase the number ofspikelets,leading to larger spikes and increased yield.
出处
《作物学报》
CAS
CSCD
北大核心
1989年第4期349-354,T001,共7页
Acta Agronomica Sinica
关键词
小麦
顶小穗
形成特点
穗粒数
Apical spikelet
Spikelets with ceased development
Branching glume
