中低产田的越冬小麦苗情,主要表现为群体不足、叶色淡黄。因此,春管关键是增根、增蘖、促壮,以达到促穗、攻粒、增重的目的,在培管技术上重点抓好“五防”: 1.防冻保苗 由于初春寒流活动频繁,二三类麦苗极易发生冻害。防冻措施有3条:一是增施有机肥。在2月上旬,每667米~2施腐熟猪杂肥2000公斤、草木灰300公斤;二是疏通水系。尤其是低洼的稻茬田块,降低地下水位,防止冰冻造成机械损伤;三是覆盖防寒物。在寒流来临之前,每667米~2均匀覆盖稻草200～ Winter wheat seedlings in low-yield field, mainly for the lack of groups, leaf color yellow. Therefore, the spring is the key to root, increase tiller, Zhuang Zhuang, in order to achieve the purpose of spike, agglomeration, weight gain, in the training of technology focus on the “five defenses”: 1. frost-proof seedlings due to frequent cold activity in early spring , Two or three types of wheat seedlings prone to freeze damage. Antifreeze measures 3: First, increase the application of organic fertilizer. In early February, every 667 meters ~ 2 rotten pig miscellaneous fertilizer 2000 kg, ash 300 kg; the second is to clear the water system. Especially low-lying rice stubble field, reduce the water table to prevent freezing caused by mechanical damage; Third, covering the cold. Before the advent of the cold, every 667 meters ~ 2 uniform coverage of straw 200 ~