期刊论文

中文

土壤

0253-9829

2008

40

5

765-769

10.3321/j.issn:0253-9829.2008.05.015

国家自然科学基金面上项目（30671206）； 湖南省博士后专项基金项目（2006FJ4265）资助；

本校为第一机构

为了给氮（N）高效油菜品种的选育及应用提供科学依据，采用土培实验对不同油菜品种在不同N素水平下各生育期的根系活力、根系吸收表面积、根系体积以及一级侧根数与N效率的关系进行了研究。结果表明：在油菜的整个生育期里，不同N素水平对油菜根系的形态及生理特性有显著的影响，均随着施N水平的增加而升高；正常施N条件下全生育期的一级侧根数，苗期的根系体积、吸收表面积与油菜N效率密切相关，而根系活力对N效率的影响相对较小；在不施N条件下全生育期的一级侧根数、根系活力，苗期以后的根系体积、吸收表面积与油菜N效率密切相关。

In order to promote the breeding and application of high nitrogen efficiency oilseed rape cultivars, the relationship between root activity, root absorbing surface, root volume and the number of lateral roots of different oilseed rape cultivars and nitrogen efficiency at different growth stages were studied by greenhouse experiments under different nitrogen levels. The result indicated that different nitrogen levels had significant effects on root morphologic and physiological properties during all growth stages, and all of those properties increased with the increase of nitrogen level. Under ...