穗期干旱胁迫对玉米单交种产量影响的研究

Study on the Effect of Maize Yield Under Water Stress During Ear Period

2004-2005年在黑龙江省农科院嫩江农科所抗旱大棚内,选用6个玉米单交种作为试材,在穗期设置正常供水、轻度干旱胁迫和中度干旱胁迫3个水分处理,研究不同水分处理条件下,不同玉米品种穗部生长发育的变化与产量的关系。试验结果表明：穗粗、行粒数、轴粗、百粒重、出籽率和轴重等6个指标与产量的相关性达到了显著或极显著水平,但不同供水条件下,穗部性状差异的显著性因品种而不同。

The experiment was conducted under the drough-resistance plastic canopy in Nenjiang Agricultural Institute of Heilongjiang Academy of Agricultural Sciences during 2004 to 2005. Six maize hybrid seeds that had great response to water were researched under normal water supply condition, mild drought stress and moderate drought stress during ear period. The aim was to select out the relationship of the change of ear character and yield. The results showed ear wideth, core wideth, core weight, row grain number, hundred grain weight and core weight and grain percent were reached prominent standard for different gradients. But under the different water supply conditions the prominent of difference was different because of the varieties.