小麦返青期的主要特点,是继续生根、长叶、分蘖,并开始幼穗分化,这是决定穗数多少的关键时期。我区历年小麦低产的主要原因是穗数不足,因此加强返青期的因苗分类管理,争取较多的穗数,成为夺取小麦高产的关键。小毒返青期的主攻方向:一类苗要促根、控蘖,使壮苗稳健生长,控制无效分蘖; The main characteristics of wheat turning green stage is to continue rooting, long leaves, tillering, and start panicle differentiation, which is the critical period to determine the number of ears. The main reason for the low yield of wheat in the past years in our region is the shortage of spikes. Therefore, it is crucial to strengthen the management of the classification of seedlings and to obtain more spike numbers in returning to green generation. Rejuvenation of the main poisoning direction: a class of seedlings to promote root, tiller, strong growth of strong seedlings, control of ineffective tillers;