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Chlorophyll and nitrogen determination for plantation-grown Eucalyptus nitens and E. globulus using a non-destructive meter

journal contribution
posted on 2023-05-16, 17:55 authored by Elizabeth Pinkard, Patel, VS, Caroline MohammedCaroline Mohammed
Portable non-destructive meters are used successfully with many species for estimating foliar chlorophyll or nitrogen (N) content. In this study, we investigated the use of the Minolta SPAD-502 for estimating chlorophyll and N content of Eucalyptus nitens and E. globulus foliage. This meter measures leaf absorbance at wavelengths 650 and 940 nm to estimate chlorophyll or N. The accuracy of the SPAD was determined, and the effects of species, site and plant type (pot-grown versus field-grown) on the SPAD-chlorophyll or SPAD-N relationship were examined. There was a strong curvilinear relationship between foliar chlorophyll content and the SPAD chlorophyll index (CI). This relationship was species-specific, and could be applied to similar-aged E. globulus grown at two contrasting sites. It differed between pot- and field-grown plants, indicating that separate calibration curves may be required for glasshouse and field situations. It was concluded that the SPAD-502 is a useful tool for screening foliar chlorophyll content in E. globulus and E. nitens plantations if adequately calibrated. The SPAD proved less useful in estimating foliar N content; only a weak relationship existed between foliar N and CI for E. globulus and E. nitens. © 2005 Elsevier B.V. All rights reserved.

History

Publication title

Forest Ecology and Management

Volume

223

Issue

1-3

Pagination

211-217

ISSN

0378-1127

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Elsevier BV

Place of publication

Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Other plant production and plant primary products not elsewhere classified

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