您好，欢迎访问贵州省农业科学院 机构知识库！
贵州省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Urea Addition Promotes the Metabolism and Utilization of Nitrogen in Cucumber

文献类型： 外文期刊

作者： Ma, Chao 1 ; Ban, Tiantian 2 ; Yu, Hongjun 3 ; Li, Qiang 3 ; Li, Xiaohui 2 ; Jiang, Weijie 1 ; Xie, Jianming 1 ;

作者机构： 1.Gansu Agr Univ, Coll Hort, Lanzhou 730070, Gansu, Peoples R China

2.Guizhou Acad Agr Sci, Inst Hort, Guiyang 550006, Guizhou, Peoples R China

3.Chinese Acad Agr Sci, Inst Vegetables & Flowers, 12 Zhongguancun S St, Beijing 100081, Peoples R China

关键词： nitrogen forms; cucumber; nitrogen metabolism; gene expression

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN： 2073-4395

年卷期： 2019 年 9 卷 5 期

页码：

收录情况： SCI

摘要： Nitrogen (N) forms include ammonium [NH4+-N], nitrate [NO3--N], and urea [CO(NH2)(2)]. Urea is the most common nitrogen fertilizer in agriculture due to its inexpensive price and high N content. Although the reciprocal influence between NO3--N and NH4+-N is well known, CO(NH2)(2) interactions with these inorganic N forms have been poorly studied. We studied the effects of different nitrogen forms with equal nitrogen on dry matter, yield, enzyme activity, and gene expression levels in cucumber. NO3--N treatment with equal CO(NH2)(2) promoted nitrate reduction, urea utilization, and the GS/GOGAT cycle but reduced the nitrate content. UR-2, NR-2, NR-3, NiR, GOGAT-1-1, and GS-4 were upregulated in response to these changes. NH4+-N treatment with equal CO(NH2)(2) promoted nitrogen metabolism and relieved the ammonia toxicity of pure NH4+-N treatment. UR-2, GOGAT-2-2, and GS-4 were upregulated, and GDH-3 was downregulated in response to these changes. Treatment with both NO3--N with added equal CO(NH2)(2) and NH4+-N with added equal CO(NH2)(2) enhanced the activities of GOGAT, GS, and UR and the amino acid pathway of urea metabolism; manifested higher glutamate, protein, chlorophyll, and nitrogen contents; and improved dry matter weight. A greater proportion of dry matter was distributed to the fruit, generating significantly higher yields. Therefore, the addition of urea to ammonium or nitrate promoted N metabolism and N utilization in cucumber plants, especially treatments with 50% NO3--N + 50% CO(NH2)(2), as the recommended nitrogen form in this study.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：贵州省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台