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近年来,受高温天气影响,部分玉米品种出现不结实现象严重。本试验主要研究玉米新品种‘浚单518’、‘永优618’在当前气候条件下的花丝活力。通过对不同日龄花丝人工授粉,收获后统计2个品种的穗长、穗粗、秃尖、百粒重、穗粒数和穗粒重。随着花丝日龄的增大,两品种穗粒数和穗粒重先上升,在吐丝后2~4天达到最大值后下降;穗粗和百粒重呈下降趋势;两品种均在2天内完成花丝全部抽出苞叶。在对各性状的相关系数分析后发现穗粒数与穗粒重相关性最大。‘浚单518’、‘永优618’抽丝快,花丝活力持续时间长,在高温气候下产量高,是耐高温型玉米新品种。
In recent years, affected by the hot weather, some maize varieties appear not to be serious. The main purpose of this experiment is to study the filament activity of a new maize cultivar ’Xundan 518’ and ’Yongyou 618’ under the current climatic conditions. By artificial pollination of different day-old filigree, the spike length, ear diameter, bald tip, the weight of 100 kernels, the number of spikelets and the weight of spike were calculated after harvest. With the increasing of silk age, the number of grains per spike and spike weight of the two cultivars increased first, then decreased after 2 ~ 4 days after spun silk; Days to complete the filigree out of bracts. After correlation analysis of the traits, it was found that the correlation between grain number and grain weight was the highest. ’Xundan 518’, ’Yongyou 618’ silk fast, filamentous vitality for a long time, high yield in high temperature, high temperature resistant new varieties of corn.