The Use of a Portable Non-Destructive Type Nitrogen Meter for Leaves of Woody Plants in Field Studies |
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Authors: | Ichie T Kitahashi Y Matsuki S Maruyama Y Koike T |
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Institution: | (1) Hokkaido University Forests, FSC, Kita-9, Nishi-9, Kita-ku, Sapporo, 060-0809, Japan, e-mail;(2) Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan;(3) Forest and Forest Products Research Institute, Sapporo, 062-8516, Japan |
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Abstract: | The practicality of the portable, non-destructive type nitrogen meter (Agriexpert PPW-3000) was tested on ten forest species. Also investigated was the potential relationship between leaf nitrogen and chlorophyll (Chl) contents and the readings taken with the PPW-3000 and a Chl meter (SPAD-502). There was a significantly positive correlation between the readings of PPW-3000 and N content in the same leaves, whereas the correlation between leaf Chl content and the PPW-3000 values was less positive. Similarly there was a significant positive correlation between actual Chl content and the SPAD-502 readings and the less positive correlation between actual N content and the SPAD-502 readings. Thus using both the PPW-3000 and SPAD-502 enables to determine leaf N and Chl contents simply and non-destructively in the field. |
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Keywords: | Agriexpert PPW-3000 chlorophyll comparison of methods SPAD-502 |
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