中国农业科学 ›› 2004, Vol. 37 ›› Issue (11): 1743-1748 .

• 研究简报 • 上一篇    下一篇

光谱技术在冬小麦氮素营养诊断中的应用研究

刘宏斌,张云贵   

  1. 中国农业科学院农业资源与农业区划研究所
  • 收稿日期:2003-09-01 修回日期:2004-01-18 出版日期:2004-11-20 发布日期:2004-11-20
  • 通讯作者: 刘宏斌

plication of Canopy Spectral Reflectance in Monitoring Nitrogen Status of Winter Wheat

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  1. 中国农业科学院农业资源与农业区划研究所
  • Received:2003-09-01 Revised:2004-01-18 Online:2004-11-20 Published:2004-11-20

摘要: 1997~1999年度3个冬小麦田间试验结果表明,氮素营养水平直接影响冬小麦冠层光谱反射特性,红光波段和近红外波段是冬小麦氮素营养诊断的敏感波段,采用红光波段和近红外波段计算的比值植被指数RVI可以较为灵敏地反映冬小麦氮素营养水平。RVI与茎基部硝酸盐含量和叶绿素测定值等常规诊断指标均呈线性正相关关系,适宜作为氮素营养诊断指标。

关键词: 氮, 光谱, 叶绿素, 硝酸盐, 冬小麦

Abstract: The objective of this study was to make clear whether remote sensing technology can be used to monitor N status of winter wheat. Results from three field experiments in 1997 to 1999 showed that there was a remarkable effect of N rate on wheat canopy spectral reflectance, especially on the red and infrared bands. Ratio vegetation index(RVI) had a remarkable linear correlation with SPAD value and plant tissue nitrate concentration, which implies that RVI is a good indicator of plant N nutrition.

Key words: Nitrogen, Spectral reflectance, Chlorophyll, Nitrate, Winter wheat