干旱地区农业研究Issue(4)：82-87,6.DOI:10.7606/j.issn.1000-7601.2015.04.13
不同基因型裸燕麦氮素利用效率与氮素营养特性
Nitrogen use efficiencies and their relationships with nitrogen nutritious characteristics of naked oats with different genotypes
摘要
Abstract
To evaluate the nitrogen use efficiencies (NUE ) and their relationships with nitrogen nutritious character-istics of naked oats with eight different genotypes ,a field experiment was conducted .Samples were collected at different growth stages and were then separated according to the tissue origins .After being dried ,the samples were weighed and the nitrogen concentration was determined using semi-micro Kjeldahl method .The main results showed that the genotypes had significant effects on NUE ( CV 11 .98% ~26 .65% ) but not on NHI ( CV 5 .04% ) .Additionally ,NFE ,as an in-tegrated index reflecting the differences of grain yield and nitrogen utilization among different oat varieties ,was signifi-cantly ( P<0 .05;P<0 .01 ) correlated with NRE ,NPP ,indicating that it could be more useful in evaluating NUE . Moreover ,NFE could be improved by increasing N assimilation and translocation after anthesis to effectively increase the N utilization in oat ( r=0 .7233* * , r=0 .7053* *) .Also ,it was found naked oat could endure soil impoverishment ( r=0 .484*) .However ,excessive nitrogen was harmful ( r= -0 .701* *) .This research indicated that top-dressing nitrogen before anthesis could improve NUE effectively .At the same nitrogen levels ,significant genotype effects of NRE and NFE caused remarkable differences among varieties ,providing a rich variation basis for oat breeding .关键词
氮素利用效率/基因型差异/评价指标/氮素营养特性/裸燕麦Key words
nitrogen use efficiency/genotypic differences/evaluation/nitrogen nutrition characteristics/naked oats分类
农业科技引用本文复制引用
葛军勇,田长叶,曾昭海,董占红,胡跃高..不同基因型裸燕麦氮素利用效率与氮素营养特性[J].干旱地区农业研究,2015,(4):82-87,6.基金项目
国家现代农业产业技术体系建设专项 （）
