小麦出苗半个月、长出三片叶后,伴随新生叶的出现,蘖节处滋生分蘖和次生根,此时,种子养分耗尽,幼苗靠自身的光合作用制造养分,供生长发育需要,由自养变为异养。因此在三叶期后因地、因苗加强管理,方能促根、增蘖,使小麦达到苗壮、蘖足、根多、根深、群体合理。一、浇好盘根水,施好分蘖肥。经验表明,整地质 Wheat emergence of two weeks, grow three leaves, with the emergence of new leaves, tillering at the birth of tillering and secondary roots, at this time, the seed nutrient depletion of seedlings by their own photosynthesis of nutrients for growth and development needs, From autotrophic to heterotrophic. Therefore, after the three-leaf period because of the ground, due to Miao strengthen management, before being able to promote root, increase tillering, so that the wheat seedlings to achieve strong, tillering foot, root, root deep, reasonable population. First, pour a good dish of water, good cast iron fertilizer. Experience shows that the entire geological