Remote sensing of plant trait responses to field-based plant-soil feedback using UAV-based optical sensors

Bob van der Meij, Lammert Kooistra, Juha Suomalainen, Janna M. Barel, Gerlinde B. de Deyn

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)

Abstract

Plant responses to biotic and abiotic legacies left in soil by preceding plants is known as plant-soil feedback (PSF). PSF is an important mechanism to explain plant community dynamics and plant performance in natural and agricultural systems. However, most PSF studies are short-term and small-scale due to practical constraints for field-scale quantification of PSF effects, yet field experiments are warranted to assess actual PSF effects under less controlled conditions. Here we used unmanned aerial vehicle (UAV)-based optical sensors to test whether PSF effects on plant traits can be quantified remotely. We established a randomized agro-ecological field experiment in which six different cover crop species and species combinations from three different plant families (Poaceae, Fabaceae, Brassicaceae) were grown. The feedback effects on plant traits were tested in oat (Avena sativa) by quantifying the cover crop legacy effects on key plant traits: height, fresh biomass, nitrogen content, and leaf chlorophyll content. Prior to destructive sampling, hyperspectral data were acquired and used for calibration and independent validation of regression models to retrieve plant traits from optical data. Subsequently, for each trait the model with highest precision and accuracy was selected. We used the hyperspectral analyses to predict the directly measured plant height (RMSE=5.12cm, R2=0.79), chlorophyll content (RMSE=0.11gm-2, R2=0.80), N-content (RMSE=1.94gm-2, R2=0.68), and fresh biomass (RMSE=0.72kgm-2, R2=0.56). Overall the PSF effects of the different cover crop treatments based on the remote sensing data matched the results based on in situ measurements. The average oat canopy was tallest and its leaf chlorophyll content highest in response to legacy of Vicia sativa monocultures (100cm, 0.95gm-2, respectively) and in mixture with Raphanus sativus (100cm, 1.09gm-2, respectively), while the lowest values (76cm, 0.41gm-2, respectively) were found in response to legacy of Lolium perenne monoculture, and intermediate responses to the legacy of the other treatments. We show that PSF effects in the field occur and alter several important plant traits that can be sensed remotely and quantified in a non-destructive way using UAV-based optical sensors; these can be repeated over the growing season to increase temporal resolution. Remote sensing thereby offers great potential for studying PSF effects at field scale and relevant spatial-temporal resolutions which will facilitate the elucidation of the underlying mechanisms.

Original languageEnglish
Pages (from-to)733-749
JournalBiogeosciences
Volume14
Issue number3
DOIs
Publication statusPublished - 2017

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sensors (equipment)
remote sensing
sensor
soil
cover crop
cover crops
unmanned aerial vehicles
vehicle
chlorophyll
monoculture
oats
Vicia sativa
Raphanus sativus
biomass
effect
Avena sativa
community dynamics
Brassicaceae
Lolium perenne
Poaceae

Cite this

@article{65a4b3e53d5843c3b19119ad964de52f,
title = "Remote sensing of plant trait responses to field-based plant-soil feedback using UAV-based optical sensors",
abstract = "Plant responses to biotic and abiotic legacies left in soil by preceding plants is known as plant-soil feedback (PSF). PSF is an important mechanism to explain plant community dynamics and plant performance in natural and agricultural systems. However, most PSF studies are short-term and small-scale due to practical constraints for field-scale quantification of PSF effects, yet field experiments are warranted to assess actual PSF effects under less controlled conditions. Here we used unmanned aerial vehicle (UAV)-based optical sensors to test whether PSF effects on plant traits can be quantified remotely. We established a randomized agro-ecological field experiment in which six different cover crop species and species combinations from three different plant families (Poaceae, Fabaceae, Brassicaceae) were grown. The feedback effects on plant traits were tested in oat (Avena sativa) by quantifying the cover crop legacy effects on key plant traits: height, fresh biomass, nitrogen content, and leaf chlorophyll content. Prior to destructive sampling, hyperspectral data were acquired and used for calibration and independent validation of regression models to retrieve plant traits from optical data. Subsequently, for each trait the model with highest precision and accuracy was selected. We used the hyperspectral analyses to predict the directly measured plant height (RMSE=5.12cm, R2=0.79), chlorophyll content (RMSE=0.11gm-2, R2=0.80), N-content (RMSE=1.94gm-2, R2=0.68), and fresh biomass (RMSE=0.72kgm-2, R2=0.56). Overall the PSF effects of the different cover crop treatments based on the remote sensing data matched the results based on in situ measurements. The average oat canopy was tallest and its leaf chlorophyll content highest in response to legacy of Vicia sativa monocultures (100cm, 0.95gm-2, respectively) and in mixture with Raphanus sativus (100cm, 1.09gm-2, respectively), while the lowest values (76cm, 0.41gm-2, respectively) were found in response to legacy of Lolium perenne monoculture, and intermediate responses to the legacy of the other treatments. We show that PSF effects in the field occur and alter several important plant traits that can be sensed remotely and quantified in a non-destructive way using UAV-based optical sensors; these can be repeated over the growing season to increase temporal resolution. Remote sensing thereby offers great potential for studying PSF effects at field scale and relevant spatial-temporal resolutions which will facilitate the elucidation of the underlying mechanisms.",
author = "{van der Meij}, Bob and Lammert Kooistra and Juha Suomalainen and Barel, {Janna M.} and {de Deyn}, {Gerlinde B.}",
year = "2017",
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language = "English",
volume = "14",
pages = "733--749",
journal = "Biogeosciences",
issn = "1726-4170",
publisher = "European Geosciences Union",
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}

Remote sensing of plant trait responses to field-based plant-soil feedback using UAV-based optical sensors. / van der Meij, Bob; Kooistra, Lammert; Suomalainen, Juha; Barel, Janna M.; de Deyn, Gerlinde B.

In: Biogeosciences, Vol. 14, No. 3, 2017, p. 733-749.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Remote sensing of plant trait responses to field-based plant-soil feedback using UAV-based optical sensors

AU - van der Meij, Bob

AU - Kooistra, Lammert

AU - Suomalainen, Juha

AU - Barel, Janna M.

AU - de Deyn, Gerlinde B.

PY - 2017

Y1 - 2017

N2 - Plant responses to biotic and abiotic legacies left in soil by preceding plants is known as plant-soil feedback (PSF). PSF is an important mechanism to explain plant community dynamics and plant performance in natural and agricultural systems. However, most PSF studies are short-term and small-scale due to practical constraints for field-scale quantification of PSF effects, yet field experiments are warranted to assess actual PSF effects under less controlled conditions. Here we used unmanned aerial vehicle (UAV)-based optical sensors to test whether PSF effects on plant traits can be quantified remotely. We established a randomized agro-ecological field experiment in which six different cover crop species and species combinations from three different plant families (Poaceae, Fabaceae, Brassicaceae) were grown. The feedback effects on plant traits were tested in oat (Avena sativa) by quantifying the cover crop legacy effects on key plant traits: height, fresh biomass, nitrogen content, and leaf chlorophyll content. Prior to destructive sampling, hyperspectral data were acquired and used for calibration and independent validation of regression models to retrieve plant traits from optical data. Subsequently, for each trait the model with highest precision and accuracy was selected. We used the hyperspectral analyses to predict the directly measured plant height (RMSE=5.12cm, R2=0.79), chlorophyll content (RMSE=0.11gm-2, R2=0.80), N-content (RMSE=1.94gm-2, R2=0.68), and fresh biomass (RMSE=0.72kgm-2, R2=0.56). Overall the PSF effects of the different cover crop treatments based on the remote sensing data matched the results based on in situ measurements. The average oat canopy was tallest and its leaf chlorophyll content highest in response to legacy of Vicia sativa monocultures (100cm, 0.95gm-2, respectively) and in mixture with Raphanus sativus (100cm, 1.09gm-2, respectively), while the lowest values (76cm, 0.41gm-2, respectively) were found in response to legacy of Lolium perenne monoculture, and intermediate responses to the legacy of the other treatments. We show that PSF effects in the field occur and alter several important plant traits that can be sensed remotely and quantified in a non-destructive way using UAV-based optical sensors; these can be repeated over the growing season to increase temporal resolution. Remote sensing thereby offers great potential for studying PSF effects at field scale and relevant spatial-temporal resolutions which will facilitate the elucidation of the underlying mechanisms.

AB - Plant responses to biotic and abiotic legacies left in soil by preceding plants is known as plant-soil feedback (PSF). PSF is an important mechanism to explain plant community dynamics and plant performance in natural and agricultural systems. However, most PSF studies are short-term and small-scale due to practical constraints for field-scale quantification of PSF effects, yet field experiments are warranted to assess actual PSF effects under less controlled conditions. Here we used unmanned aerial vehicle (UAV)-based optical sensors to test whether PSF effects on plant traits can be quantified remotely. We established a randomized agro-ecological field experiment in which six different cover crop species and species combinations from three different plant families (Poaceae, Fabaceae, Brassicaceae) were grown. The feedback effects on plant traits were tested in oat (Avena sativa) by quantifying the cover crop legacy effects on key plant traits: height, fresh biomass, nitrogen content, and leaf chlorophyll content. Prior to destructive sampling, hyperspectral data were acquired and used for calibration and independent validation of regression models to retrieve plant traits from optical data. Subsequently, for each trait the model with highest precision and accuracy was selected. We used the hyperspectral analyses to predict the directly measured plant height (RMSE=5.12cm, R2=0.79), chlorophyll content (RMSE=0.11gm-2, R2=0.80), N-content (RMSE=1.94gm-2, R2=0.68), and fresh biomass (RMSE=0.72kgm-2, R2=0.56). Overall the PSF effects of the different cover crop treatments based on the remote sensing data matched the results based on in situ measurements. The average oat canopy was tallest and its leaf chlorophyll content highest in response to legacy of Vicia sativa monocultures (100cm, 0.95gm-2, respectively) and in mixture with Raphanus sativus (100cm, 1.09gm-2, respectively), while the lowest values (76cm, 0.41gm-2, respectively) were found in response to legacy of Lolium perenne monoculture, and intermediate responses to the legacy of the other treatments. We show that PSF effects in the field occur and alter several important plant traits that can be sensed remotely and quantified in a non-destructive way using UAV-based optical sensors; these can be repeated over the growing season to increase temporal resolution. Remote sensing thereby offers great potential for studying PSF effects at field scale and relevant spatial-temporal resolutions which will facilitate the elucidation of the underlying mechanisms.

U2 - 10.5194/bg-14-733-2017

DO - 10.5194/bg-14-733-2017

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SP - 733

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JO - Biogeosciences

JF - Biogeosciences

SN - 1726-4170

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