玉米新选品种产量比较及其主要特征

以延边大学农学院玉米组选育的7个玉米新品种为试验材料进行的产量比较分析结果表明，在2002年的产比中增产的品种有5个，平均比对照增产0．3％～15．0％。其中表现突出的新品种有延农5和延农15，其产量分别为9447．6kg／hm^2和8561．1kg／hm^2，分别比对照品种增产15．0％和2．5％。这2个品种在2000～2002年3年的试验中平均比对照增产19．4％和10．6％，增产幅度比较大，且在不同年份的表现比较稳定。

Field comparison and main characteristics of new maize hybrids

Comparative analysis of the yields of seven new maize hybrids was conducted. The results showed that five of them gained higher yield than the check Sidan 9 with the increasing rate of 0.3% -15.1% in average. Among the hybrids examined, the two hybrids Yannong 5 and Yannong 15 were best. The yields of Yannong 5 and Yannong 15 were 9 447. 6 kg/hm2 and 8 561.1 kg/hm2 with the increasing rate of 15.0% and 2.5% respectively. The average increasing rate of the two hybrids were great and stable which were 19.4% and 10.6% respectively from 2000 to 2002.