【摘要】 以15个辽宁省有代表性的中熟、中晚熟、晚熟玉米品种为试材,结合1999～2007年辽宁省玉米区域试验结果,对不同熟期品种的产量和生产性能进行比较研究。结果表明:中熟、中晚熟品种较晚熟品种有增产趋势,一些品种表现特别突出;中熟、中晚熟品种密植增产潜力大,密度适应范围广,稳产性更好;群体结构合理,经济系数高,源、流、库协调;在精量播种和机械化收获等方面,中熟、中晚熟品种有明显优势。更多还原

【Abstract】 The fifteen maize varieties which representative mid-maturing,mid-late-maturing and late-maturing in Liaoning province were carried,combined with the results of regional tests in Liaoning province during 1999-2007 and compared the yield and yield performance among different ripening period varieties,especially mid-maturing and mid-late-maturing maize varieties.The result indicated that the mid-maturing、mid-late-maturing varieties had yield-increasing tendency compared to late-maturing maize varieties.Some of the varieties had prominent performance.The mid-maturing,mid-late-maturing varieties had great close planting potential and broad density adaptation scope and stable yield productivity.The mid-maturing,mid-late-maturing varieties had reasonable community structure and high harvest index and coordinated source-flow-sink relationship.They also had obvious superiority in accurate farming and mechanized harvest.更多还原