The use of near-infrared reflectance spectroscopy in litter decomposition studies

Joffre, Richard; Gillon, Dominique; Dardenne, Pierre; Agneessens, Richard; Biston, R.

doi:10.1051/forest:19920504

Cited by 121 publications

(65 citation statements)

References 6 publications

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“…PLS diers from stepwise wavelength searches in that it uses all the information in the spectrum to determine any component concentration, a fundamental advantage over single wavelength applications (Shenk and Westerhaus 1991b). As emphasized by Jore et al (1992) and Bolster et al (1996), the full-spectrum calibration method (PLS regression) performed better than stepwise regression on dry ground foliage or litter samples. The ®nal calibration equations allowed the percentage content of biochemical constituents of the leaves to be determined from the spectra, using partial least squares regression, with a standard error of prediction of 0.13% for nitrogen, 0.97% for cellulose, 1.33% for lignin and 1.52% for lipids.…”

Section: Biochemical Determinationsmentioning

confidence: 99%

Between-tree variations in leaf ? 13 C of Quercus pubescens and Quercus ilex among Mediterranean habitats with different water availability

1997

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In this study, sun leaf carbon isotope composition (δC) of two co-occurring woody Mediterranean species (Quercus pubescens Willd., a deciduous oak, and Q. ilex L., an evergreen one) was investigated on four sites with different water availability. The total range of δC values was 4.4 and 3.1‰ for Q. pubescens and Q. ilex respectively. The intra-site variability was about 3‰. Total mean per species was equal. There were significant differences among sites, but at each site means of δC were not significantly different between species. A simple physiological model predicts no difference in intrinsic water-use efficiency (WUE) between evergreen and deciduous oaks. The relationship between site means of δC and water parameters suggests that there is a leaf functional adjustment with respect to available water resource. No correlation was found between δC and the contents of any mass-based biochemical constituent. Nevertheless there was a significant correlation between δC and leaf mass per area of Q. ilex. For both species, there is also a positive correlation between leaf δC and individual crown area, i.e. a structural characteristic at tree level. Causal relations between δC and plant-environment interactions are discussed.

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Section: Biochemical Determinationsmentioning

confidence: 99%

Between-tree variations in leaf ? 13 C of Quercus pubescens and Quercus ilex among Mediterranean habitats with different water availability

1997

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“…hullámprofilt adnak, fontos biokémiai információkat nyújtva a funkciós csoportok (-CH, -OH, -NH kémiai kötések) karakteréről és szá-máról, illetve a mérés során egy precíz kémiai ujjlenyomat képezhető a szerves anyagokról (BEN-DOR et al, 1997). A NIRS széleskörűen alkalmazott eljárás a hulladék dekompozíciós folyamatainak -mint például a komposztálás -elemzésére (JOFFRE et al, 1992;GILLON et al, 1993;COUTEAUX et al, 1995), különösen a cellulóz bomlásának analízisére (HARTMANN & APPEL, 2006). BEN-DOR és munkatársai (1997) szoros korrelációt mutatott ki a OH és a C-H csoportok mennyisége (kombinálva higroszkópos vízzel, keményítővel, cellulózzal és ligninnel) és a komposztálás ideje között.…”

Section: K Omposztstab Ilitásunclassified

A komposztérettség és meghatározásának módszerei – Szemle –

Füleky¹

2016

Agrokem

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“…This is related to vibrational and rotational movements of important biochemical functional groups such as -CH, -OH, and -NH chemical bonds (Shenk et al, 2001). During the course of decomposition, the NIR spectrum is modified in a regular way (Joffre et al, 1992;Gillon et al, 1999) and the rate of decomposition can be predicted from the NIR spectrum (Bruun et al, 2005b;Thomsen et al, 2009). However, no monotonous relationship is likely to exist between the frequency at which light is absorbed and resistance to biodegradation.…”

Section: Near-infrared Spectroscopy (Nir)mentioning

confidence: 99%

Measuring and modeling continuous quality distributions of soil organic matter

et al. 2010

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Abstract. An understanding of the dynamics of soil organic matter (SOM) is important for our ability to develop management practices that preserve soil quality and sequester carbon. Most SOM decomposition models represent the heterogeneity of organic matter by a few discrete compartments with different turnover rates, while other models employ a continuous quality distribution. To make the multicompartment models more mechanistic in nature, it has been argued that the compartments should be related to soil fractions actually occurring and having a functional role in the soil. In this paper, we make the case that fractionation methods that can measure continuous quality distributions should be developed, and that the temporal development of these distributions should be incorporated into SOM models. The measured continuous SOM quality distributions should hold valuable information not only for model development, but also for direct interpretation. Measuring continuous distributions requires that the measurements along the quality variable are so frequent that the distribution approaches the underlying continuum. Continuous distributions lead to possible simplifications of the model formulations, which considerably reduce the number of parameters needed to describe SOM turnover. A general framework for SOM models representing SOM across measurable quality distributions is presented and simplifications for specific situations are discussed. Finally, methods that have been used or have the potential to be used to measure continuous quality SOM distributions are reviewed. Generally, existing fractionation methods will have to be modified to allow measurement of distributions or new fractionation techniques will have to be develCorrespondence to: S. Bruun (sab@life.ku.dk) oped. Developing the distributional models in concert with the fractionation methods to measure the distributions will be a major task. We hope the current paper will help generate the interest needed to accommodate this.

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The use of near-infrared reflectance spectroscopy in litter decomposition studies

Cited by 121 publications

References 6 publications

Between-tree variations in leaf ? 13 C of Quercus pubescens and Quercus ilex among Mediterranean habitats with different water availability

Between-tree variations in leaf ? 13 C of Quercus pubescens and Quercus ilex among Mediterranean habitats with different water availability

A komposztérettség és meghatározásának módszerei – Szemle –

Measuring and modeling continuous quality distributions of soil organic matter

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