不同供氮水平下油菜品种硝态氮累积利用特征与氮效率差异  

Difference of nitrogen use efficiency and characters of nitrate accumulation and utilization between oilseed rape varieties under different N application levels

作　　者：余佳玲[1] 陈历儒 张振华[1] 王文明[1] 杨春[1] 宋海星[1] 官春云[3] 

机构地区：[1]湖南农业大学资源环境学院,土壤肥料资源高效利用国家工程实验室,农田污染控制与农业资源利用湖南省重点实验室,植物营养湖南省普通高等学校重点实验室,湖南长沙410128 [2]岳阳市农产品质量检验检测中心,湖南岳阳414000 [3]国家油料改良中心湖南分中心,湖南长沙410128

出　　处：《中国土壤与肥料》2014年第3期18-22,共5页Soil and Fertilizer Sciences in China

基　　金：国家自然科学基金项目(31071851;31101596);国家油菜产业技术体系栽培生理岗位;国家支撑计划(2012BAD15B04;2010BAD01B01);湖南省高校创新平台开放基金项目(12K064;10K034);湖南省政府专项

摘　　要：以两种氮效率不同的油菜品种X-13和X-29为材料,在严格控制氮营养水平的砂培条件下,研究了不同施氮水平下两个品种油菜硝态氮累积量、硝酸还原酶活性、氮素吸收量、籽粒产量、氮效率等指标的差异特征。结果表明,与氮低效品种X-29相比,氮高效品种X-13的硝态氮累积量多,硝态氮再利用量大,叶片硝酸还原酶活性高,其氮素累积量也多,籽粒产量和氮效率也高,品种间差异显著。供氮水平提高,两品种的硝态氮累积量和再利用量都增大,叶片硝酸还原酶活性增强,氮素随着累积量增加,籽粒产量升高,而氮效率则下降。In this paper,two oilseed rape varieties named X-13 and X-29 were used as plant materials for sand culture with the different nitrogen （N） application levels to study the different effects of N application levels on accumulation amount of nitrate,nitrate reductase （NR） activity,absorption amount of N,seed yield and N efficiency in the two oilseed rape varieties.The results showed that compared with X-29,the nitrate N accumulation is higher,reutilization ratio of nitrate,the activity of NR in leaf,N accumulation,amount and seed yield are increased in the X-13 treatment.And the difference between the two varieties is significant.But the increasing of nitrogen application level,nitrate accumulation amount,reutilization ratio of nitrate,and the activity of NR in leaf increased and the N efficiency decreased in both oilseed rape varieties.

关 键 词：不同施氮水平 油菜 氮效率 氮素利用 

分 类 号：S634.3[农业科学—蔬菜学]