Abstract:

Abstract：The worst drought in Beijing continues in these years, since 2006, the corn production methode shifted from irrigable cultivation to rained dry field cultivation, which brought the changefully items during the breeding period by taking advantage of natual precipitation, plus the unsuitable way of corn selection, these items will cause the reduction production of corn.This dissertation is focused on the corn breeding period by sowing in installment of corn in Beijing plain, to ensure the suitable season for sowing in order to be the reference for rained dry field corn selection in Beijing plain.