您好，欢迎访问河南省农业科学院 机构知识库！
河南省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Recalibrating plant water status of winter wheat based on nitrogen nutrition index using thermal images

文献类型： 外文期刊

作者： Zhao, Ben 1 ; Adama, Traore 1 ; Ata-Ul-Karim, Syed Tahir 3 ; Guo, Yan 4 ; Liu, Zhandong 1 ; Xiao, Junfu 1 ; Liu, Zugui 1 ;

作者机构： 1.Chinese Acad Agr Sci, Farmland Irrigat Res Inst, Key Lab Crop Water Use & Regulat, Minist Agr, Xinxiang, Henan, Peoples R China

2.Chinese Acad Agr Sci, Grad Sch, Beijing, Peoples R China

3.Univ Tokyo, Grad Sch Agr & Life Sci, Bunkyo Ku, 1-1-1 Yayoi, Tokyo 1138657, Japan

4.Henan Acad Agr Sci, Inst Agr Econ & Informat, Zhengzhou 450002, Peoples R China

关键词： Winter wheat; Plant water status; Nitrogen nutrition index; Thermal image

期刊名称：PRECISION AGRICULTURE （ 影响因子：5.385； 五年影响因子：5.004 ）

ISSN： 1385-2256

年卷期：

页码：

收录情况： SCI

摘要： Accurate and timely assessment of crop water status is imperative for in-season irrigation scheduling in crop production. The canopy water stress index and water deficit index have been widely used to appraise crop water status using spatial thermal images. However, the inter-relationships of CWSI, WDI and crop nitrogen status have been rarely investigated. Therefore, the present study was conducted to compare the differences between the CWSI and WDI values of winter wheat across different N and irrigation treatments, to examine the effect of crop N status on CWSI and WDI, and to recalibrate the CWSI and WDI values for better assessment of water status in winter wheat using nitrogen nutrition index. The result demonstrated that CWSI and WDI values decreased with the increasing irrigation rates within the same N treatments. However, both indices could not be used for assessing plant water status under different N treatments at the same I treatments. The increase in CWSI and WDI values with decreasing N rates indicated that there is a significant effect of plant N status on CWSI and WDI values. The pure canopy foliage temperature and mixed soil canopy temperature showed a significantly negative relationship with NNI across different N treatments. The recalibrated Tc and Ts values were lower than the original values under the N-limiting treatments. Using the recalibrated Tc and Ts value, the CWSI and WDI values were recalculated, which can better signify plant water status under different N conditions.

  • 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：河南省农业科学院

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