杂交玉米优良品种对比试验

通过选择目前广西已审定通过或已进入生产性试验的13个玉米新品种,以"正大619"品种为对照,在广西天等县进行品种对比试验,旨在鉴定参试品种的丰产性、适应性、抗逆性以及品质,客观评价参试品种特征特性及生产利用价值,为天等县玉米高产优质生产种植提供科学依据。试验结果表明,参试品种中,亚航0919、亚航639、南校969、桂单591、亚航689产量增幅较高在19.3%-36.44%之间,综合性状表现好,增产潜力大,可在天等县因地制宜推广种植;桂单0810、兆丰788、兆丰688虽与对照品种增产幅度不大,但在整齐度,综合性状表现优于对照品种,可因地制宜推广种植;桂单1125虽比对照品种产量增幅大,但后期早衰严重,表现一般;其他品种因田间表现不佳,建议不宜大面积推广种植。

A comparison experiment of top-quality hybrid maize varieties

13 new maize varieties which have passed the examination were selected for a comparison experiment in Tiandeng County, Guangxi and Zhengda619 as Control Group, in order to identify the yielding ability, adaptability, stress resistance and quality of the tested varieties, and to evaluate their characters and ex- tension values so as to provide technical references to field production. The experimental results show that among the tested varieties, Yahang0919, Yahang639, Nanxiao969, Guidan591 and Yahang689＇s yield increase rates will be 19.3%-36.44% with good integrated characters and yield-increase potential, which can be extended in Tiandeng. Although the yield-increase rates of Guidan0810, Zhaofeng788 and Zhaofeng688 are only a little higher than Control Group, but their uniformity and integrated characters representations are better than Conrol Group, which can also be extended in field production according to local conditions. Guidan1125＇s yield-increase rate is higher than Control Group, but shows the serious senilism in late growth stage and average representation. Other varieties have not good field representations, which are not suggested to be extended in field production.