植物营养与肥料学报2013，Vol.19Issue(3)：586-596,11.DOI:10.11674/zwyf.2013.0308
不同基因型油菜氮素利用效率的差异及其与农艺性状和氮营养性状的关系
Differences of nitrogen use efficiency of rapeseed (Brassica napus L.) genotypes and their relations to agronomic and nitrogen characteristics
摘要
Abstract
A field experiment was conducted to investigate nitrogen use efficiency (NUE) of 50 rapeseed (Brassica napus L.) genotypes at two N rates (N 0 and 180 kg/ha).Differences of agronomic and N characteristics between high and low NUE genotypes were evaluated.The results show that NUEs vary significantly among different genotypes,and the greatest differences of NUE ware 2.5-fold (at N 180 kg/ha) and 1.7-fold (at N 0 kg/ha).Genotypic variances of agronomic and N characteristics are observed,of which first valid branch height has the greatest variance (＞ 50％),while the N content of seed has the least variance (about 6％).At both N rates,the No.of seeds per silique,grain yield,ratio of grain yield to shoot biomass,and ratio of grain N uptake to shoot N uptake of the high NUE genotypes are greater than those of the low NUE genotypes,while the first valid branch heights of the high NUE genotypes are significantly lower than those of the low NUE genotypes.There are significant negative correlations between NUE and the N contents of different plant parts,stem and leaf N cumulant,silique husk N cumulant,ratio of stem and leaf N cumulant to shoot N cumulant and ratio of silique husk N cumulant to shoot N cumulant.However,there are no significant differences of shoot biomass and shoot N cumulant between the high NUE genotypes and the low NUE genotypes.Responses of the agronomic and N characteristics to N supply are significantly different between the high NUE genotypes and the low NUE genotypes.关键词
油菜/氮素利用效率/基因型/农艺性状Key words
rapeseed/ NUE/ genotype/ agronomic characteristic分类
农业科技引用本文复制引用
杨睿,伍晓明,安蓉,李亚军,张玉莹,陈碧云,高亚军..不同基因型油菜氮素利用效率的差异及其与农艺性状和氮营养性状的关系[J].植物营养与肥料学报,2013,19(3):586-596,11.基金项目
教育部新世纪优秀人才支持计划项目(NCET-08-0465) （NCET-08-0465）
西北农林科技大学创新团队建设计划项目资助. （）
