目前,惊蛰已过,我市小麦已经拔节,小麦生产进入了中后期管理阶段。这一时期小麦的生长特点是由营养生长与生殖生长并进,逐渐转入以生殖生长为主,生长中心以茎、穗为主,分蘖出现两极分化,大分蘖成穗,小分蘖死亡。是小麦一生中生长速度最快、生长量最大、水肥需求最多的时期,也是形成产量的关键时期。本着作物“三分种,七分管”的原则,必须根据苗情变化 At present, Jingzhe has passed, the city has been jointed wheat, wheat production has entered the middle and late management stage. During this period, the growth of wheat was characterized by vegetative and reproductive growth, and gradually shifted to reproductive growth. The main growth centers were stems and spikes, with tillering polarization, tillering to panicles, and death from small tillers. Wheat is the fastest growing life, the largest growth, water and fertilizer demand most of the time, but also a key period of production. In line with crop “three species, seven in charge ” principle, must be based on the change of seedling conditions