植物内水分の非破壊リアルタイム計測

DOI Web Site Web Site BIBCODE 被引用文献10件 参考文献14件

書誌事項

タイトル別名
  • Nondestructive and Real-time Measurement of Moisture in Plant
  • ショクブツ ナイスイ ブン ノ ヒハカイ リアルタイム ケイソク

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説明

We constructed a THz transillumination system for water content monitoring, and we succeeded in measuring the moisture level in plants. Our measurement system uses a widely tunable coherent THz parametric oscillator source. As target we chose for this experiment a leaf of Japanese basil. The time variation of the water content in the leaf was monitored in two situations: a leaf freshly cut which is left to dry out, and the leaf of a water stressed plant. We found by real-time measurements that the water content of a cut leaf does not decrease uniformly in time. Also, the response to water stress is delayed by about 5-10 minutes. Furthermore, we demonstrated a moisture measurement using a transillumination THz imaging system. As target we chose for this experiment a leaf of Hedera helix held between two thin plastic sheets. The change of the moisture distribution is clearly visible. These results show that the method described here can be applied to nondestructive and real-time monitoring of water content in plants.

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