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大地回春,气温上升,我省小麦自南向北逐渐返青、起身、拔节,进入旺盛生长阶段。这是小麦一生中由营养生长为主,转入生殖生长和营养生长并进的重要转折时期。这个时期的特点是:冬前分蘖迅速长大、春季分蘖不断滋生,群体达到高峰,中部叶片出生,根系急剧下扎,茎节递次延伸,矛盾错综复杂,幼穗分化形成。是小麦多成穗、长大穗,夺取高产的关键时刻。但是,在这一阶段里,地上部与地下部、主茎与分蘖、
Earth rejuvenation, the temperature rises, the province gradually re-green wheat from south to north, get up, jointing, into the vigorous growth stage. This is an important turning point in the life of wheat, which is mainly made by vegetative growth and transferred into reproductive growth and vegetative growth. The characteristics of this period are: tiller grows rapidly in winter, the tiller grows continuously in spring, the population reaches the peak, the middle leaves are born, the root is drained and the stem is extended, the contradiction is complex and the spike differentiation occurs. Wheat is more than a spike, grow big spike, capture the key moment of high yield. However, at this stage, aboveground and belowground parts, stems and tillers,