本项研究创建和完善了一套规范化的利用多种鉴定方法(田间鉴定、人工模拟逆境筛选和实验室多项指标测定),运用综合指标评价玉米品种抗冷性的技术体系,并确定了指标的内在联系,使抗冷性指标数量化。用以上方法对7663份玉米品种(系)进行了芽期、苗期和灌浆期抗冷性评价,并从中筛选出强抗冷材料1569份,育成6个抗冷杂交品种,在黑龙江、辽宁中、北部地区推广利用,获得显著经济效益。本研究在作物抗逆生理和测定技术上有所突破和创新。 This study created and perfected a set of standardized technical system which used a variety of identification methods (field identification, artificial analogous adversity screening and laboratory multiple index determination) to evaluate the chilling resistance of maize varieties by using comprehensive indexes and identified the indexes The intrinsic link, so that cold resistance index quantified. 7663 maize varieties (lines) were evaluated for their cold resistance at bud, seedling and filling stages. 1569 copies of strong cold-resistant materials were screened out and 6 cold-resistant hybrids were bred in this study. In Heilongjiang and Liaoning , Promote the use of the northern region, access to significant economic benefits. The research breakthroughs and innovations in crop stress physiology and determination of technology.