Response of thematic mapper bands to plant water stress
Response of thematic mapper bands to plant water stress
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专题制图带对植物水分胁迫的响应
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
D. Rickman
中科院分区：
文献类型：
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作者：
W. Cibula;E. F. Zetka;D. Rickman
叶片反射率随含水量减少的变化被假定发生在1.55 -1.75和2.08-2.35 μm波长范围内。为了验证这一假设，对多花黑麦草（Lolium mulitiflorum Lam.）和燕麦（燕麦唾液L.），它们是在受控的室外环境中生长的。充分浇水的控制床和水强调床定期检查与聚四氟乙烯的反射率参考校准的分光辐射计。观察到的变化与其他研究者采用的随机叶片模型预测的变化相一致（在1.55 - 1.75 μm区域，叶片反射随着叶片含水量的减少而增加）。虽然TM波段1-3的百分比变化几乎与TM波段5和7的变化一样大，但反射率变化的绝对值要低得多。我们认为，这些模式可能是广泛的植被类型的特征。在现象检测方面，这些模式应该是conside…
Abstract Changes in leaf reflectance as water content decreases have been hypothesized to occur in the 1 55-1.75 and 2.08-2.35 μm wavelength regions. To evaluate this hypothesis, studies were conducted on ryegrass (Lolium muitiflorum Lam.) and oats (Avena saliva L.), which were grown in a controlled, outdoor situation. Both fully-watered control beds and water-stressed beds were periodically examined with a spectroradiometer calibrated against a reflectance reference of polytetrafluoroethylene. The observed changes correspond to those predicted by stochastic leaf models employed by other investigators (leaf reflection increases in the l.55-l.75μm region as leaf water content decreases). Although the percentage changes in TM bands 1-3 are nearly as great as those found in TM bands 5 and 7, the absolute values of reflectance change are much lower. We believe that these patterns are probably characteristic of a broad range of vegetation types. In terms of phenomena detection, these patterns should be conside...