不同小麦基因型孕穗期根系性状与吸氮量的关系  

Study on the Effects of Root Traits on Nitrogen Uptake by Different Wheat Genotypes at Booting Stage

作　　者：贾永国[1] 安调过[1] 李俊明[1] 童依平[2] 安忠民[1] 

机构地区：[1]中国科学院遗传发育生物学研究所农业资源研究中心 [2]中国科学院遗传发育生物学研究所,北京100101

出　　处：《华北农学报》2006年第3期37-40,共4页Acta Agriculturae Boreali-Sinica

基　　金：国家自然科学基金重大项目(30390083);中科院知识创新工程方向性项目(KSCX2-SW-304)

摘　　要：通过水培培养,研究了生产上主栽的不同小麦基因型在充分供氮条件下孕穗期的根系、根系生理活性及根系与地上部干重以及吸氮量之间的关系。结果表明,地上部干重、根干重、根体积、根冠比、根活性及植株吸氮量不同基因型间有显著差异,根总吸收面积、根活跃吸收面积不同基因型间无明显差异;植株吸氮量与地上部干重显著相关,其相关系数达0.634,经进一步相关性分析表明,植株吸氮量的差异和地上部干重的差异主要是由于植株根干重和根体积不同造成的。研究表明,选择根干重和根体积大的小麦品种有利于提高小麦的氮利用效率。The shoot dry weight, root dry weight, root volume, root total absorption area, root active absorption area, root/shoot ratio, root activity, and nitrogen uptake of five selected winter wheat genotypes were studied at booting stage by using hydroponics culture. Except the root absorption areas, all the other investigated traits showed significant differences among wheat genotypes. N uptake related well with shoot dry weight. Future correlation analysis demonstrated that variations of root dry weight and volume best explained the variations of shoot dry weight and nitrogen uptake of the five wheat genotypes. This research implies that selection of root dry weight and volume can increase nitrogen use efficiency of wheat.

关 键 词：小麦 孕穗期 氮素 根系 吸氮量 

分 类 号：S512.01[农业科学—作物学]