不同遮荫时间下玉米雌雄开花间隔与产量的关系研究
The Relationship Between Anthesis Silking Interval and Maize Yield Under Different Shading Time
鲁晓民 1张新 1张前进 1魏昕 1曹丽茹 1郭金生 1王振华1
作者信息
- 1. 河南省农业科学院粮食作物研究所,郑州450002
- 折叠
摘要
雌雄穗开花间隔(ASI)是衡量玉米抗逆性的重要指标.在抽雄期对12个黄淮海地区推广种植面积较大玉米品种进行不同时间50％的遮光处理,以研究ASI与产量及其他相关性状的关系.研究表明:在7天的遮荫条件下,不同品种的抽雄期延迟,ASI延长、穗长变短、穗行数和行粒数减少,小区产量严重降低;遮荫对株高、穗位、穗粗和百粒重并没有显著的影响;在15天的遮荫条件下,不同品种ASI大幅度延长(‘豫禾988’除外),导致雌雄不协调,植株不能正常授粉结实;相关分析发现在7天遮荫条件下,品种ASI与小区产量呈显著负相关,以小区产量降低的百分率和ASI为衡量指标,将‘豫禾988’、‘武科2号’、‘蠡玉16’归为耐荫性较强的品种.
Abstract
Anthesis silking interval (ASI) is an important index to measure the stress tolerance of maize.In order to study the relationship between yield,ASI and other traits,twelve largely cultivated corn varieties in Huang-Huai-Hai area were shaded in seven days and fifteen days by 50％ under artificial shading and control at the tasseling stage.The results suggested that under seven days shading condition,there were delayed tasseling stage of different varieties,prolonged ASI,shorter ear length,and decreased row number and row grains,and the grain yield decreased seriously,but plant height,ear height,ear diameter and 100 grain weight were not significantly affected.Under fifteen days shading condition,ASIof different varieties was significantly prolonged (except 'Yuhe 988'),resulting in unbalanced male and female,the plant could not be normally pollinated.Correlation analysis found that under seven days shading condition,varieties' ASIwas significantly and negatively correlated with grain yield.Taking the percentage of plot yield reduction and ASI as the index,the ' Yuhe 988',' Wuke 2',' Liyu 16'could be classified as strong shade tolerant varieties.
关键词
玉米/遮荫/雌雄开花间隔(ASI)/小区产量Key words
maize/shading/anthesis silking interval/plot yield引用本文复制引用
基金项目
国家玉米产业技术体系(CARS-02-05)
河南省科技攻关(152102110133)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据