Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies

Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies

Forage quality is an important regulator of livestock performance also determining the grazing capacity in grasslands and pastures. The objective of this work was to develop spectral normalized indices to accurately predict canopy nitrogen (N), neutral detergent fibre (NDF), and acid detergent fibre (ADF) concentrations and in vitro dry matter digestibility (IVDMD) in three forage species, at two phenological stages and under two fertilization conditions. To select indices with the highest possible independence from canopy structure, we prioritized the selection of indices that were stable at both leaf and canopy scales and evaluated if the best selected indices were correlated with selected leaf and canopy structural traits and leaf water content. All possible normalized indices, based on the reflectance and the first difference reflectance, for the 400 – 2400 nm spectral range were related through simple regression models with N, NDF, and ADF concentrations and IVDMD. The index that combined the first difference reflectance in the 685 and 1770 nm wavelengths was found to be a potentially useful index to predict canopy N concentration under different field conditions. The best indices selected to predict canopy NDF and ADF concentration and IVDMD, based on the reflectance around 2120 – 2145 and 2250 – 2260 nm, had limited application and appeared to be suitable only to identify gross differences in fibre and IVDMD. Future studies should analyse how the best selected indices behave under field lighting conditions and for a wide range of species, phenological stages, and variations in canopy structural traits.

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Main Authors: Aguirre Castro Moreno, Paula Haydeé, Garbulsky, Martín Fabio
Format: Texto biblioteca
Language:eng
Subjects:VEGETATION INDEX, HYPERSPECTRAL DATA, NITROGEN, FIBRE, DRY MATTER DIGESTIBILITY,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46304
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spelling KOHA-OAI-AGRO:463042022-08-09T11:18:43Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46304http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGSpectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopiesAguirre Castro Moreno, Paula HaydeéGarbulsky, Martín Fabiotextengapplication/pdfForage quality is an important regulator of livestock performance also determining the grazing capacity in grasslands and pastures. The objective of this work was to develop spectral normalized indices to accurately predict canopy nitrogen (N), neutral detergent fibre (NDF), and acid detergent fibre (ADF) concentrations and in vitro dry matter digestibility (IVDMD) in three forage species, at two phenological stages and under two fertilization conditions. To select indices with the highest possible independence from canopy structure, we prioritized the selection of indices that were stable at both leaf and canopy scales and evaluated if the best selected indices were correlated with selected leaf and canopy structural traits and leaf water content. All possible normalized indices, based on the reflectance and the first difference reflectance, for the 400 – 2400 nm spectral range were related through simple regression models with N, NDF, and ADF concentrations and IVDMD. The index that combined the first difference reflectance in the 685 and 1770 nm wavelengths was found to be a potentially useful index to predict canopy N concentration under different field conditions. The best indices selected to predict canopy NDF and ADF concentration and IVDMD, based on the reflectance around 2120 – 2145 and 2250 – 2260 nm, had limited application and appeared to be suitable only to identify gross differences in fibre and IVDMD. Future studies should analyse how the best selected indices behave under field lighting conditions and for a wide range of species, phenological stages, and variations in canopy structural traits.Forage quality is an important regulator of livestock performance also determining the grazing capacity in grasslands and pastures. The objective of this work was to develop spectral normalized indices to accurately predict canopy nitrogen (N), neutral detergent fibre (NDF), and acid detergent fibre (ADF) concentrations and in vitro dry matter digestibility (IVDMD) in three forage species, at two phenological stages and under two fertilization conditions. To select indices with the highest possible independence from canopy structure, we prioritized the selection of indices that were stable at both leaf and canopy scales and evaluated if the best selected indices were correlated with selected leaf and canopy structural traits and leaf water content. All possible normalized indices, based on the reflectance and the first difference reflectance, for the 400 – 2400 nm spectral range were related through simple regression models with N, NDF, and ADF concentrations and IVDMD. The index that combined the first difference reflectance in the 685 and 1770 nm wavelengths was found to be a potentially useful index to predict canopy N concentration under different field conditions. The best indices selected to predict canopy NDF and ADF concentration and IVDMD, based on the reflectance around 2120 – 2145 and 2250 – 2260 nm, had limited application and appeared to be suitable only to identify gross differences in fibre and IVDMD. Future studies should analyse how the best selected indices behave under field lighting conditions and for a wide range of species, phenological stages, and variations in canopy structural traits.VEGETATION INDEXHYPERSPECTRAL DATANITROGENFIBREDRY MATTER DIGESTIBILITYInternational Journal of Remote Sensing
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic VEGETATION INDEX
HYPERSPECTRAL DATA
NITROGEN
FIBRE
DRY MATTER DIGESTIBILITY
VEGETATION INDEX
HYPERSPECTRAL DATA
NITROGEN
FIBRE
DRY MATTER DIGESTIBILITY
spellingShingle VEGETATION INDEX
HYPERSPECTRAL DATA
NITROGEN
FIBRE
DRY MATTER DIGESTIBILITY
VEGETATION INDEX
HYPERSPECTRAL DATA
NITROGEN
FIBRE
DRY MATTER DIGESTIBILITY
Aguirre Castro Moreno, Paula Haydeé
Garbulsky, Martín Fabio
Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
description Forage quality is an important regulator of livestock performance also determining the grazing capacity in grasslands and pastures. The objective of this work was to develop spectral normalized indices to accurately predict canopy nitrogen (N), neutral detergent fibre (NDF), and acid detergent fibre (ADF) concentrations and in vitro dry matter digestibility (IVDMD) in three forage species, at two phenological stages and under two fertilization conditions. To select indices with the highest possible independence from canopy structure, we prioritized the selection of indices that were stable at both leaf and canopy scales and evaluated if the best selected indices were correlated with selected leaf and canopy structural traits and leaf water content. All possible normalized indices, based on the reflectance and the first difference reflectance, for the 400 – 2400 nm spectral range were related through simple regression models with N, NDF, and ADF concentrations and IVDMD. The index that combined the first difference reflectance in the 685 and 1770 nm wavelengths was found to be a potentially useful index to predict canopy N concentration under different field conditions. The best indices selected to predict canopy NDF and ADF concentration and IVDMD, based on the reflectance around 2120 – 2145 and 2250 – 2260 nm, had limited application and appeared to be suitable only to identify gross differences in fibre and IVDMD. Future studies should analyse how the best selected indices behave under field lighting conditions and for a wide range of species, phenological stages, and variations in canopy structural traits.
format Texto
topic_facet VEGETATION INDEX
HYPERSPECTRAL DATA
NITROGEN
FIBRE
DRY MATTER DIGESTIBILITY
author Aguirre Castro Moreno, Paula Haydeé
Garbulsky, Martín Fabio
author_facet Aguirre Castro Moreno, Paula Haydeé
Garbulsky, Martín Fabio
author_sort Aguirre Castro Moreno, Paula Haydeé
title Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
title_short Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
title_full Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
title_fullStr Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
title_full_unstemmed Spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
title_sort spectral normalized indices related with forage quality in temperate grasses scaling up from leaves to canopies
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46304
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
work_keys_str_mv AT aguirrecastromorenopaulahaydee spectralnormalizedindicesrelatedwithforagequalityintemperategrassesscalingupfromleavestocanopies
AT garbulskymartinfabio spectralnormalizedindicesrelatedwithforagequalityintemperategrassesscalingupfromleavestocanopies
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