不同密度的油菜根系特征和产量与倒伏之间的相关性初探  

Preliminary studies on relationship between root morphological traits,yield per plant and lodging in Brassica napus L.

作　　者：刘唐兴[1] 官春云[1] 

机构地区：[1]湖南农业大学油料作物研究所

出　　处：《西南农业学报》2008年第1期23-25,共3页Southwest China Journal of Agricultural Sciences

基　　金：国家948项目资助:油菜特异资源和育种新技术的引进、改良和创新研究;湖南省教育厅资助(06D057);甘蓝型油菜抗倒性比较研究

摘　　要：以抗倒性不同的3个油菜品种为材料,分析了3种密度下根系特征及其与单株产量和倒伏的关系,结果表明:①根系各性状存在显著或极显著相关:主根长与侧根数目、根体积,根粗与根体积存在显著正相关;侧根数目与根粗、根体积、根茎粗和根茎粗与根粗、根体积存在极显著正相关;根系干鲜比与侧根数目和根体积存在显著负相关。②单株产量与根体积和根茎粗存在显著正相关。③倒伏指数与根粗存在较强的负相关,但未达显著水平。The root morphological traits, yield per plant and lodging were analyzed by the experiment of 3 varieties among 3 different density. The results of correlation analysis showed that there were significant positive correlation （ P 〈 0.05 ） between main root length and number of lateral root,root volume,and including between root thickness and root volume. Significant positive correlation （ P 〈0.01 ） also existed between number of lateral root and root thickness ,root volume, thickness of rhizome. Moreover, it was the same as between thickness of rhizome and root thickness,root volume. However, significant negative correlation （ P 〈 0.05 ）existed between root dry weight/root fresh weight and number of lateral root, root volume. The yield per plant had significant positive correlation （ P 〈 0. 05 ） with root volume and thickness of rhizome. The lodging index had negative correlation in a certain degree with root thickness and thickness of rhizome ,but did not reach statistically significant levels.

关 键 词：甘蓝型油菜 根系特征 单株产量 倒伏 

分 类 号：S565.4[农业科学—作物学]