Accurate estimation of nitrogen concentration in deciduous tree leaves in a field study using a portable non-destructive nitrogen detector

Eguchi, Norikazu; Ichie, Tomoaki; Ji, Dong-Hun; Karatsu, Kazuki; Koike, Takao

doi:10.1016/j.jplph.2005.09.004

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…In addition, the soil plant analysis development (SPAD) value, which indicates leaf greenness, and the estimated N content per leaf area (N PPW ) were non-destructively measured, using the portable chlorophyll meter SPAD-502 (Konica-Minolta, Osaka, Japan) and Agriexpert PPW-3000 (Satake Corp., Hiroshima, Japan) devices, respectively (Ichie et al 2002;Eguchi et al 2006). For each plant, two fully sun-exposed leaves from the upper canopy (3rd or 4th from the top) of two different shoots were measured (totally 4 leaves per plant) and averaged so as to give one more robust value.…”

Section: Pre-treatmentmentioning

confidence: 99%

High doses of ethylene diurea (EDU) are not toxic to willow and act as nitrogen fertilizer

Agathokleous

Paoletti

Saitanis

et al. 2016

Science of The Total Environment

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Section: Pre-treatmentmentioning

confidence: 99%

High doses of ethylene diurea (EDU) are not toxic to willow and act as nitrogen fertilizer

Agathokleous

Paoletti

Saitanis

et al. 2016

Science of The Total Environment

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“…The resultant water stress induces stomatal closure and thus inhibits photosynthetic function (Mulkey et al 1996, Koike et al 2001a, Kenzo et al 2004, 2006. In addition, water stress is usually considered to be greater if the crown position is higher (Tyree and Zimmermann 2002).…”

Section: --mentioning

confidence: 99%

“…The leaf thickness was determined using a micrometer (Mitsutoyo, Tokyo, Japan). The leaf area (determined using an LI-300, Li-Cor, Lincoln, NE, USA) and leaf dry mass were measured to calculate the SLA; the leaf dry mass was obtained after drying for 2 d at 60 o C. The leaf N content was measured with a portable nitrogen detector (Agriexpert PPW-3000, Satake, Hiroshima, Japan) calibrated with a NC analyzer (NC-900, Shimadzu, Kyoto, Japan) (Ichie et al 2002, Eguchi et al 2006). …”

Section: --mentioning

confidence: 99%

Photosynthetic water use efficiency in tree crowns of Shorea beccariana and Dryobalanops aromatica in a tropical rain forest in Sarawak, East Malaysia

Kitahashi¹,

Ichie²,

Maruyama³

et al. 2008

Photosynt.

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Photosynthetic water use efficiency (PWUE), stomatal conductance (g s ), and water potential were measured at two different positions in the tree crown of two emergent tropical tree species (Shorea beccariana Burck, Dryobalanops aromatica Gaertn. f.). The trees were about 50 m high, in a tropical rain forest in Sarawak, East Malaysia. In both species, g s at the upper crown position at midday was lower than at the lower crown position, even though both positions were exposed to full sunlight; the difference was greater in S. beccariana. Hydraulic limitation occurs in the upper crown position in both species. A midday depression was observed in the photon saturated photosynthetic rate in both species, especially at the upper crown. However, PWUE was markedly higher in the upper crown than the lower crown at midday, even though no morphological adjustment was observed in the leaves; this difference was greater in S. beccariana.

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“…Chang and Robison (2003) also found that the relationship between SPAD values and leaf Chl content changed seasonally in a deciduous tree species (Liquidambar styraciflua). In contrast, Eguchi et al (2006) found that in deciduous tree species (Betula platyphylla and Betula maximowicziana), the relationships of Agriexpert readings and leaf N content did not differ between maturing (sampled in May and June) and mature leaves (sampled in July and August). However, in these studies, the effect of season could not be separated from the effect of leaf age because the target species were deciduous.…”

Section: Introductionmentioning

confidence: 73%

“…SPAD is a widely used instrument for assessing leaf Chl content in trees (e.g., Campbell et al 1990, Markwell et al 1995, Martínez and Guiamet 2004, Coste et al 2010. In recent years, Agriexpert was developed as a tool to assess leaf N content (Ichie et al 2002, Eguchi et al 2006, Kitahashi et al 2008. Both meters use light absorption rates at selected wavelengths: SPAD measures the absorption rates of light at two wavelengths (650 and 940 nm) and calculates SPAD values (Uddling et al 2007).…”

Section: Methodsmentioning

confidence: 99%

Development of models for estimating leaf chlorophyll and nitrogen contents in tree species with respect to seasonal changes

Mizusaki¹,

Umeki²,

Honjo³

2013

Photosynt.

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Models were developed to estimate nondestructively chlorophyll (Chl) content per unit of leaf area (Chl area ) and nitrogen content per unit of leaf area (N area ) using readings of two optical meters for five warm-temperate, evergreen, broadleaved tree species (Castanopsis sieboldii, Cinnamomum tenuifolium, Eurya japonica, Machilus thunbergii, and Neolitsea sericea). It was determined whether models should be adjusted seasonally. Readings (were obtained six times during a year period and Chl area and N area were determined using destructive methods. Bayesian inference was used to estimate parameters of models that related optical meter readings to Chl area or N area for each species. Deviance information criterion values were used to select the best among models, including the models with seasonal adjustment. The selected models were species-specific and predicted Chl area accurately (R 2 = 0.93-0.96). The best model included parameters with seasonal adjustments for one out of five species. Model-based estimates of N area were not as accurate as those for Chl area , but they were still adequate (R 2 = 0.64-0.82). For all species studied, the best models did not include parameters with seasonal adjustments. The estimation methods used in this study were rapid and nondestructive; thus, they could be used to assess a function of many leaves and/or repeatedly on individual leaves in the field.

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Accurate estimation of nitrogen concentration in deciduous tree leaves in a field study using a portable non-destructive nitrogen detector

Cited by 9 publications

References 12 publications

High doses of ethylene diurea (EDU) are not toxic to willow and act as nitrogen fertilizer

High doses of ethylene diurea (EDU) are not toxic to willow and act as nitrogen fertilizer

Photosynthetic water use efficiency in tree crowns of Shorea beccariana and Dryobalanops aromatica in a tropical rain forest in Sarawak, East Malaysia

Development of models for estimating leaf chlorophyll and nitrogen contents in tree species with respect to seasonal changes

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