Exploring the applicability of field measurements of mid-infrared reflectance using a portable band-pass filter type radiometer to assess paddy rice yields
Exploring the applicability of field measurements of mid-infrared reflectance using a portable band-pass filter type radiometer to assess paddy rice yields
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探索使用便携式带通滤光片型辐射计现场测量中红外反射率来评估水稻产量的适用性
DOI：
10.1080/01431161003762330
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发表时间：
2011
影响因子：
3.4
通讯作者：
Akihiko Kimura
中科院分区：
文献类型：
--
作者：
Michio Shibayama;Toshihiro Sakamoto;Akihiko Kimura
关于作物中红外（MIR）波段的田间辐射测量的案例研究很少。本文介绍了利用便携式带通滤光片型光谱辐射计测量成熟水稻在MIR波段（3.425±0.1和3.9±0.1 μm）的反射率来评估穗数（NP, m−2）的实验。首先，在室内进行试验，用不同千粒重的稻谷和割下的干稻秆及叶鞘、叶片和穗进行试验。在MIR、可见光（VIS）、近红外（NIR）和短波红外（SIR）波段测量来自太阳或电灯泡的光从谷物或植物器官反射的强度。重粒和密穗在MIR波段的反射率低于轻粒，SIR波段的反射率与重粒和密穗的反射率相同。对几块成熟的水稻进行了实地测量，其中部分穗事先被摘去。试验表明，测量MIR波段反射因子的仪器和方法可用于研究NP中MIR测量的可能性。
There are few case studies concerning field radiometric measurements in the mid-infrared (MIR) wavelengths for crop plants. This article describes radiometric experiments measuring reflectance in the MIR bands (3.425 ± 0.1 and 3.9 ± 0.1 μm) to evaluate the number of panicles (NP, m−2) of ripening paddy rice using a portable band-pass filter type spectroradiometer. First, laboratory experiments were conducted using containers filled with rice grains of various 1000-grain weights and fresh and dry slashed rice culms plus leaf sheaths, leaf blades and panicles. The intensity of light from the sun or electric bulbs reflected from the grains or plant organs was measured in the MIR, visible (VIS), near-infrared (NIR) and short-wave infrared (SIR) bands. Heavier grains and dense panicles reflected less in the MIR bands than lighter grains and the same occurred in the SIR bands. Field measurements were conducted for several plots of ripening rice where the panicles were partly plucked beforehand. The trial showed that the instrumentation and the method for measuring MIR band reflectance factors were usable for investigating the possibility of MIR measurements for NP.
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