【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。更多还原

【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.更多还原