期刊论文

中文

西北农业学报

1004-1389

2008

17

5

181-185,228

国家自然科学基金面上项目（30671206）； 湖南省自然科学基金重点项目（07JJ3074）； 湖南省博士后专项基金项目（2006FJ4265）资助；

本校为第一机构

采用溶液培养试验,在不同硝态氮浓度下测定了不同氮效率油菜幼苗的根长、一级侧根数和根系活力的变化情况,同时在正常供氮条件下,测定了油菜幼苗的硝态氮吸收动力学参数,并对其单株生物量、氮素吸收量及氮素生理效率进行了比较。结果表明,不同品种油菜幼苗的根长、一级侧根数、根系活力、对硝态氮的亲和力及最大吸收速率、单株生物量、氮素吸收量、氮素生理效率等均有明显差异。本试验所比较的3个油菜品种中,氮高效品种湘油15在氮素胁迫条件下,具有更长的根长、更多的一级侧根数和更强的根系活力,且对硝态氮的亲和力也大,而高潜力品种742除其最大吸收速率最高之外,根系活力、对硝态氮的亲和力、...

Under solution culture condition,the length of root,the number of lateral roots,and root activity of seedling from different rape varieties were determined,and the kinetic parameters of nitrate uptake by oil rape seedling were also determined under normal supplying nitrogen,at the same time,the absorbing nitrogen amount and nitrogen physiological efficiency were compared.The results indicated that the obvious differences exist among the three different oil rape varieties in the length of root,the number of lateral roots,root activity,the affini...