我省小麦,于二月中、下旬,自南向北渐次返青,尔后起身拔节、打苞孕穗。此期,正是小麦长根、长蘖、长叶、长茎、怀胎孕穗,营养生长与生殖生长同时并进的时期;是小麦一生中变化最大、自身矛盾最多的一个时期;也是麦田管理的关键时期。对早春麦田的管理不仅关系着成穗的多少、穗子的大小,而且对后期的 Wheat in our province, in mid-February, late, gradually re-green from south to north, then got up and join the festival, bract booting. This period is the period of wheat root, tiller, long leaf, long stem, pregnant bosom, vegetative and reproductive growth at the same time; it is the period with the most changes and the most contradictions in wheat’s life; it is also the key of wheat field management period. Management of early spring wheat fields is not only related to the number of ears, the size of the ears, but also for the late