冬小麦籽粒灌浆期旗叶枯尖与根系特征的关联研究  

The relationship between flag leaf withertip and root characteristics of winter wheat at filling stage

作　　者：杨红福[1] 温明星[1] 曲朝喜[1] 

机构地区：[1]江苏丘陵地区镇江农业科学研究所,句容212400

出　　处：《上海农业学报》2011年第4期58-60,共3页Acta Agriculturae Shanghai

基　　金：科技部农业科技成果转化资金项目(2010GB2C100152);镇江市科技支撑项目(NY2008039;NY2010022);江苏省农业科技自主创新资金项目[CX(10)128];镇江农科所科研基金项目(zjs2008013)资助

摘　　要：通过盆栽试验研究了不同类型小麦品种籽粒灌浆期旗叶枯尖的发生与根系活力、单株根干重、根鲜重以及根冠比之间的关系。结果表明:发生叶枯尖症状的小麦品种旗叶叶绿素含量低于旗叶生长正常的小麦品种。叶枯尖症状发生与小麦生长后期根系特征关系密切。有枯尖症状的小麦品种后期根系活力相对较低,2个枯尖品种根鲜重、根干重和根冠比等均明显低于4个无枯尖的小麦品种。Pot experiments with winter wheat were carried out to investigate the relationships of flag leaf withertip of wheat cultivars at filling stage to root activity,dry and fresh weights of roots per plant,and root/ shoot ratio.The results showed that the flag leafs chlorophyll content of wheat cultivars with flag leaf withertip was lower than that of normal wheat cultivars,and there was a close relation between occurrence of flag leaf withertip and root characteristics of wheat cultivars at later growth stage.The wheat cultivars with flag leaf withertip were relatively low in root activity at later growth stage,and the fresh root weight,dry root weight and root/shoot ratio of the 2 cultivars with flag leaf withertip were obviously lower than those of the tested 4 cultivars without flag leaf withertip.

关 键 词：冬小麦 灌浆期 旗叶枯尖 根重 根系活力 

分 类 号：S512.1[农业科学—作物学] S501