Photosynthetica 2002, 40(2):289-292 | DOI: 10.1023/A:1021362127882
The Use of a Portable Non-Destructive Type Nitrogen Meter for Leaves of Woody Plants in Field Studies
- 1 Hokkaido University Forests, FSC, Kita-ku, Sapporo, Japan, e-mail
- 2 Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
- 3 Forest and Forest Products Research Institute, Sapporo, Japan
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.
Additional key words: Agriexpert PPW-3000; chlorophyll; comparison of methods; SPAD-502
Published: June 1, 2002 Show citation
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