京郊平原地区玉米品种等雨播种适宜播期探讨

摘要：近年来北京地区持续干旱，自2006年起玉米生产开始由灌溉栽培转向雨养旱作生产，随之带来利用自然降水播种导致播种时期的不确定性，品种选择不当将导致严重减产，品质大幅下降。本研究旨在通过分期播种探明京郊平原地区主栽玉米品种的生育天数的变化，确定争取高产的适宜播种时期，为京郊平原地区雨养旱作生产的品种选择提供科学依据，具有较强的指导意义。

Research for the rained corns’suitable sowing period in Beijing plain.

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.