摘要
以玉米杂交种隆平206和凤玉906为供试材料,设60 000、75 000、90 000株/hm23个密度处理,研究不同种植密度条件下夏玉米基部节间相关性状和倒伏之间的关系。结果表明,隆平206生育后期植株倒伏率随密度增加而增大,凤玉906在低密度条件下倒伏率为0,其他2个密度条件下倒伏率均小于5%。随着种植密度的增加,玉米植株基部节间直径逐渐变小,茎粗系数减小,同时基部节间鲜重、干重逐渐减少,基部节间抗折力逐步降低,两个品种均表现出类似趋势。品种间比较,在同一密度处理下,虽然凤玉906基部节间抗折力显著低于隆平206,但茎秆基部节间干重显著高于隆平206,玉米茎秆基部节间干重对植株倒伏有重要影响。
Two maize hybrids, Longping206 and Fengyu906 were grown, to investigate the relationship betweenlodging and characteristics of basal internodes, a density experiment was designed with three levels of 60 000, 75 000 and 90 000 plants/ha. The results showed that the lodging rate increased significantly with increasing plant densityin Longping206. The lodging rate of 60 000 plants/ha treatment was 0, and the lodging rates of 75 000 plants/ha and90 000 plants/ha treatments were less than 5% in Fengyu906. With the increase of planting density, the stem diame-ter coefficient decreased significantly. Fresh weight, dry weight, diameter and the snapping resistance of basal inter-nodes decreased gradually at the same time. Three basal internodes showed a similar trend in two hybrids. Underthe same density treatment, the snapping resistance of basal internodes of Fengyu906 was significantly lower thanthat of Longping206. However, the dry weight of stem internodes of Fengyu906 was significantly higher than thatof Longping206. The results suggested that the dry weight of basal internodes had great effect on the lodging of sum-mer maize compared with other basal internodes characters.
出处
《玉米科学》
CAS
CSCD
北大核心
2015年第5期112-116,共5页
Journal of Maize Sciences
基金
国家星火计划项目(2014GA710004)
安徽省教育厅重大项目(KJ2014ZD10)
关键词
夏玉米
种植密度
基部节间性状
倒伏
Summer maize
Planting density
Basal internodes characteristic
Lodging
