小麦中低产田的越冬苗情 ,主要表现为群体不足、个体瘦弱、叶片细长、叶色淡黄、分蘖不多、根系较少、入土又浅 ,最后导致穗数不足、穗型变小、粒重不高 ,造成减产。因此 ,对小麦中低产田培管措施是增根、增蘖、促壮 ,以达到促穗、攻粒、增重的目的 ,关键是“四防”技术 :一、 Winter winter in the low-yielding wheat seedling, mainly for the lack of groups, the individual thin, slender leaves, leaf color yellow, less tillering, less root, soil and shallow, and finally lead to lack of spikes, panicle smaller, Grain weight is not high, resulting in reduced production. Therefore, the cultivation of wheat in low-yielding fields measures is to increase root, increase tiller, and promote strong, in order to achieve the purpose of spike, agglomeration, weight gain, the key is the “four defenses”