Biospeckle laser portable equipment monitoring water behavior at coffee tree leaves

J. V. L. Botega; R. A. Braga; M. P. P. Machado; L. A. Lima; G. F. Rabelo; R. R. Cardoso

doi:10.1117/12.869766

13 September 2010 Biospeckle laser portable equipment monitoring water behavior at coffee tree leaves

J. V. L. Botega, R. A. Braga, M. P. P. Machado, L. A. Lima, G. F. Rabelo, R. R. Cardoso

Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871L (2010) https://doi.org/10.1117/12.869766
Event: Speckle 2010, 2010, Florianapolis, Brazil

Abstract

Water is a noble natural resource and its monitoring and control are key to an efficient and responsible use concerning with the impacts in the ambient. Particularly in irrigation processes there are many approaches to monitor the water consumption, nevertheless the access of water demand in an irrigated crop presents some challenges to the routine methods. The effort to develop a non-destructive methodology associated with the ability to be handle, unfolds the way to the adoption of optical techniques. The biospeckle laser phenomenon can be elected as one of the potential instruments to access the water content in a leaf and to associate this information to the water demand. The sensitiveness of the biospeckle patterns related to biological activities is the basis of the hypothesis which concerns the monitoring of water activity in a leaf. This work evaluated the feasibility to implement the biospeckle laser as a tool to measure the water content in a leaf and to relate it with the demand of water in a perennial crop, such as coffee trees. Complementary it was tested the ability and the robustness of the proposed protocol in a portable assembly. Plants of coffee crop, coffee arabica trees, were prepared to be monitored during water stress. The proposed monitoring were carried out in leaves without detach them from the plant, within 5 consecutive days. The results presented a significant relation between the water content reduction and the biospeckle values.

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J. V. L. Botega, R. A. Braga, M. P. P. Machado, L. A. Lima, G. F. Rabelo, and R. R. Cardoso "Biospeckle laser portable equipment monitoring water behavior at coffee tree leaves", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871L (13 September 2010); https://doi.org/10.1117/12.869766

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