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Use of Near-infrared Spectroscopy to Assess Phosphorus Fractions of Different Plant Availability in Forest Soils : Volume 12, Issue 11 (05/06/2015)

By Niederberger, J.

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Book Id: WPLBN0003983396
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Use of Near-infrared Spectroscopy to Assess Phosphorus Fractions of Different Plant Availability in Forest Soils : Volume 12, Issue 11 (05/06/2015)  
Author: Niederberger, J.
Volume: Vol. 12, Issue 11
Language: English
Subject: Science, Biogeosciences
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Boča, A., Nitschke, R., Todt, B., Niederberger, J., Kühn, P., Kohler, M., & Bauhus, J. (2015). Use of Near-infrared Spectroscopy to Assess Phosphorus Fractions of Different Plant Availability in Forest Soils : Volume 12, Issue 11 (05/06/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Chair of Silviculture, Institute of Forest Sciences, University of Freiburg, Freiburg, Germany. The analysis of soil phosphorus (P) in fractions of different plant availability is a common approach to characterize the P status of forest soils. However, quantification of organic and inorganic P fractions in different extracts is labor intensive and therefore rarely applied for large sample numbers. Therefore, we examined whether different P fractions can be predicted using near-infrared spectroscopy (NIRS).

We used the Hedley sequential extraction method (modified by Tiessen and Moir, 2008) with increasingly strong extractants to determine P in fractions of different plant availability and measured near-infrared (NIR) spectra for soil samples from sites of the German forest soil inventory and from a nature reserve in southeastern China.

The R2 of NIRS calibrations to predict P in individual Hedley fractions ranged between 0.08 and 0.85. When these fractions were combined into labile, moderately labile and stable P pools, R2 of calibration models was between 0.38 and 0.88 (all significant). Model prediction quality was higher for organic than for inorganic P fractions and increased with the homogeneity of soil properties in soil sample sets. Useable models were obtained for samples originating from one soil type in subtropical China, whereas prediction models for sample sets from a range of soil types in Germany were only moderately useable or not useable.

Our results indicate that prediction of Hedley P fractions with NIRS can be a promising approach to replace conventional analysis, if models are developed for sets of soil samples with similar physical and chemical properties, e.g., from the same soil type or study site.


Summary
Use of near-infrared spectroscopy to assess phosphorus fractions of different plant availability in forest soils

Excerpt
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