Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops
Aims: The improvement of nitrogen use efficiency (NUE) of crops allows crop nitrogen (N) demands to be met while reducing N supply, and so reducing excess N which has potential negative environmental implications. NUE is often determined destructively at the end of crop growth-cycles without considering temporal variability. Here we present a methodological study which optimises the determination of NUE throughout the sugarcane growth-cycle using minimally destructive methods, and suggest the use of these methods for non-destructive NUE determination over the growth-cycle of other giant C4 crops. Methods and results: The determination of the NUE relied on the optimisation of three methods: the estimation of aboveground biomass, N content and N derived from fertiliser (NdfF). First, the ability of different allometric relationships to estimate sugarcane biomass was investigated by selecting a relationship based on height and diameter to estimate aboveground biomass along the crop growth-cycle. Secondly, we assessed the minimum number of harvested sugarcane required to construct a dilution curve to predict N content from biomass and found that a sampling of 5 sugarcane at 3 dates was sufficient to represent aboveground N content over the growth-cycle. Finally, the ability of 15N content of individual leaves to represent the NdfF in 15N-fertilised cane was tested. The first and second leaf below the top visible dewlap were the most representative. Based on a variance analysis, we assessed the level of influence of each method on the NUE calculation. Crop age accounted for 54% of the variance of NUE, the choice of 15N leaf 13%, with the choice of model to estimate biomass and the number of plants harvested for the N dilution curve, each accounting for less than 2% over the four sampling dates. Conclusions: This study highlighted the importance of evaluating NUE not only at the point of harvest. We propose, therefore, a set of methods to study NUE throughout the sugarcane growth-cycle by using minimally destructive sampling.
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Subjects: | F62 - Physiologie végétale - Croissance et développement, échantillonnage, plante en c4, efficacité d'utilisation, azote, Saccharum, http://aims.fao.org/aos/agrovoc/c_6774, http://aims.fao.org/aos/agrovoc/c_24828, http://aims.fao.org/aos/agrovoc/c_36789, http://aims.fao.org/aos/agrovoc/c_5192, http://aims.fao.org/aos/agrovoc/c_6725, |
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dig-cirad-fr-5963422024-01-29T02:59:00Z http://agritrop.cirad.fr/596342/ http://agritrop.cirad.fr/596342/ Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops. Poultney Daniel, Christina Mathias, Versini Antoine. 2020. Plant and Soil, 613 : 453-597.https://doi.org/10.1007/s11104-020-04611-3 <https://doi.org/10.1007/s11104-020-04611-3> Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops Poultney, Daniel Christina, Mathias Versini, Antoine eng 2020 Plant and Soil F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 Aims: The improvement of nitrogen use efficiency (NUE) of crops allows crop nitrogen (N) demands to be met while reducing N supply, and so reducing excess N which has potential negative environmental implications. NUE is often determined destructively at the end of crop growth-cycles without considering temporal variability. Here we present a methodological study which optimises the determination of NUE throughout the sugarcane growth-cycle using minimally destructive methods, and suggest the use of these methods for non-destructive NUE determination over the growth-cycle of other giant C4 crops. Methods and results: The determination of the NUE relied on the optimisation of three methods: the estimation of aboveground biomass, N content and N derived from fertiliser (NdfF). First, the ability of different allometric relationships to estimate sugarcane biomass was investigated by selecting a relationship based on height and diameter to estimate aboveground biomass along the crop growth-cycle. Secondly, we assessed the minimum number of harvested sugarcane required to construct a dilution curve to predict N content from biomass and found that a sampling of 5 sugarcane at 3 dates was sufficient to represent aboveground N content over the growth-cycle. Finally, the ability of 15N content of individual leaves to represent the NdfF in 15N-fertilised cane was tested. The first and second leaf below the top visible dewlap were the most representative. Based on a variance analysis, we assessed the level of influence of each method on the NUE calculation. Crop age accounted for 54% of the variance of NUE, the choice of 15N leaf 13%, with the choice of model to estimate biomass and the number of plants harvested for the N dilution curve, each accounting for less than 2% over the four sampling dates. Conclusions: This study highlighted the importance of evaluating NUE not only at the point of harvest. We propose, therefore, a set of methods to study NUE throughout the sugarcane growth-cycle by using minimally destructive sampling. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/596342/7/596342.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s11104-020-04611-3 10.1007/s11104-020-04611-3 info:eu-repo/semantics/altIdentifier/doi/10.1007/s11104-020-04611-3 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s11104-020-04611-3 info:eu-repo/semantics/reference/purl/https://rdcu.be/b6gft info:eu-repo/grantAgreement/EC///// |
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F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 |
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F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 Poultney, Daniel Christina, Mathias Versini, Antoine Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
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Aims: The improvement of nitrogen use efficiency (NUE) of crops allows crop nitrogen (N) demands to be met while reducing N supply, and so reducing excess N which has potential negative environmental implications. NUE is often determined destructively at the end of crop growth-cycles without considering temporal variability. Here we present a methodological study which optimises the determination of NUE throughout the sugarcane growth-cycle using minimally destructive methods, and suggest the use of these methods for non-destructive NUE determination over the growth-cycle of other giant C4 crops. Methods and results: The determination of the NUE relied on the optimisation of three methods: the estimation of aboveground biomass, N content and N derived from fertiliser (NdfF). First, the ability of different allometric relationships to estimate sugarcane biomass was investigated by selecting a relationship based on height and diameter to estimate aboveground biomass along the crop growth-cycle. Secondly, we assessed the minimum number of harvested sugarcane required to construct a dilution curve to predict N content from biomass and found that a sampling of 5 sugarcane at 3 dates was sufficient to represent aboveground N content over the growth-cycle. Finally, the ability of 15N content of individual leaves to represent the NdfF in 15N-fertilised cane was tested. The first and second leaf below the top visible dewlap were the most representative. Based on a variance analysis, we assessed the level of influence of each method on the NUE calculation. Crop age accounted for 54% of the variance of NUE, the choice of 15N leaf 13%, with the choice of model to estimate biomass and the number of plants harvested for the N dilution curve, each accounting for less than 2% over the four sampling dates. Conclusions: This study highlighted the importance of evaluating NUE not only at the point of harvest. We propose, therefore, a set of methods to study NUE throughout the sugarcane growth-cycle by using minimally destructive sampling. |
format |
article |
topic_facet |
F62 - Physiologie végétale - Croissance et développement échantillonnage plante en c4 efficacité d'utilisation azote Saccharum http://aims.fao.org/aos/agrovoc/c_6774 http://aims.fao.org/aos/agrovoc/c_24828 http://aims.fao.org/aos/agrovoc/c_36789 http://aims.fao.org/aos/agrovoc/c_5192 http://aims.fao.org/aos/agrovoc/c_6725 |
author |
Poultney, Daniel Christina, Mathias Versini, Antoine |
author_facet |
Poultney, Daniel Christina, Mathias Versini, Antoine |
author_sort |
Poultney, Daniel |
title |
Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
title_short |
Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
title_full |
Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
title_fullStr |
Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
title_full_unstemmed |
Optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant C4 crops |
title_sort |
optimising non-destructive sampling methods to study nitrogen use efficiency throughout the growth-cycle of giant c4 crops |
url |
http://agritrop.cirad.fr/596342/ http://agritrop.cirad.fr/596342/7/596342.pdf |
work_keys_str_mv |
AT poultneydaniel optimisingnondestructivesamplingmethodstostudynitrogenuseefficiencythroughoutthegrowthcycleofgiantc4crops AT christinamathias optimisingnondestructivesamplingmethodstostudynitrogenuseefficiencythroughoutthegrowthcycleofgiantc4crops AT versiniantoine optimisingnondestructivesamplingmethodstostudynitrogenuseefficiencythroughoutthegrowthcycleofgiantc4crops |
_version_ |
1792500007724646400 |