[1]刘新宇,卓红,区禧贤,等.油菜苗期氮素形态、分配及氮素生产力对不同氮水平的响应[J].江苏农业科学,2025,53(13):278-284.
 Liu Xinyu,et al.Response of nitrogen form,distribution and productivity of Brassica napus L. to different nitrogen levels at seedling stage[J].Jiangsu Agricultural Sciences,2025,53(13):278-284.
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油菜苗期氮素形态、分配及氮素生产力对不同氮水平的响应()

《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第53卷
期数:
2025年第13期
页码:
278-284
栏目:
资源与环境
出版日期:
2025-07-05

文章信息/Info

Title:
Response of nitrogen form,distribution and productivity of Brassica napus L. to different nitrogen levels at seedling stage
作者:
刘新宇卓红区禧贤覃瑶陈映汐韩永亮
湖南农业大学资源学院,湖南长沙 410128
Author(s):
Liu Xinyuet al
关键词:
低氮氮素生产力光合速率叶绿素荧光油菜
Keywords:
-
分类号:
S634.306
DOI:
-
文献标志码:
A
摘要:
为探究不同供氮(N)水平对甘蓝型油菜苗期氮素形态、分配及氮素生产力的影响,以湖南省普遍种植的甘蓝型油菜品种沣油958(FY958)和沣油730(FY730)作为试验材料,采用沙培,设置3个N水平处理(N10,氮含量 10 mol/L;N3,氮含量3 mol/L;N1,氮含量1 mol/L)。在油菜苗期取样测定其生物量、全氮含量、NH+4含量、NO-3含量、游离氨基酸含量、叶绿素含量、净光合速率及叶绿素荧光动力学参数。结果表明,油菜氮含量和氮素积累量随氮水平的上升而上升,氮水平上升提高了油菜氮素在叶中的分配比例,降低了在根中的分配比例。油菜的NH+4和NO-3含量占比随氮水平增加而降低。氮素吸收效率、氮素生产力均随氮水平的上升而下降。较N1处理,N10处理的FY958和FY730的根氮素生产力分别显著降低40.08%、35.10%,茎氮素生产力分别显著降低25.47%、30.10%,叶氮素生产力分别显著降低5301%、52.24%。氮水平下降显著降低了油菜叶绿素含量和净光合速率。油菜的Fv/FoFv/FmqPΦPSⅡ均随氮水平增加而增加,但NPQ随氮水平增加而降低。综上所述,相较于N10处理,N1处理的油菜氮素在叶中的分配比例降低,在根中的分配占比增加,NH+4和NO-3含量占比显著增加,氮素吸收效率及氮素生产力显著增加。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2024-07-11
基金项目:湖南省教育厅重点项目(编号:23A0163)。
作者简介:刘新宇(2000—),男,湖南邵阳人,硕士研究生,主要从事油菜氮高效研究。E-mail:482351051@qq.com。
通信作者:韩永亮,博士,副教授,主要从事植物营养与施肥研究。E-mail:xiaohliang@163.com。
更新日期/Last Update: 2025-07-05