Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations
Large amounts of fertilizers are applied in tropical planted forests managed in short rotations to sustain high biomass productions in highly weathered soils. Our study aimed to assess the consequences of fertilizer and biosolid additions on groundwater quality and nutrient leaching in Eucalyptus grandis plantations. Soil solutions were continuously sampled in 9 plots using plate lysimeters and ceramic cups at depths of 15, 50, 100 and 300 cm. The solutions were collected every week over 6 years to determine the concentrations of the main anions and cations. Three treatments were studied in 3 blocks: no nitrogen addition (control), 120 kg N ha-1 applied as ammonium sulphate, and 30 t ha-1 of biosolid added containing 1260 kg N ha-1. The main biogeochemical processes controlling the chemistry of gravitational solutions throughout their transfer were identified. The chemical composition of soil solutions in the topsoil was driven by the mineralization of soil organic matter and harvest residues as well as the dissolution of the fertilizers. The peaks of nutrient concentrations reached a depth of 1 m about 9 months after planting but high concentrations never reached a depth of 3 m, except after the last biosolid application. E. grandis trees exhibited a remarkable filter capacity against nutrient leaching as a result of i) a relatively slow transfer of mobile ions in deep soil layers, ii) a very fast root growth (down to > 6 m at 1 year after planting) and iii) a high demand of trees in water and nutrients from 6 months after planting onward. Our results suggest that the number of fertilizations could be reduced in commercial eucalypt plantations growing in deep Ferralsols and that biosolid applications could be adjusted to reach high growth rates without polluting deep water tables.
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dig-cirad-fr-5866332022-03-30T12:03:38Z http://agritrop.cirad.fr/586633/ http://agritrop.cirad.fr/586633/ Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations. Laclau Jean-Paul, Gonçalves José Leonardo M., Ranger Jacques. 2017. In : Book of Abstracts IUFRO 125th Anniversary Congress 2017. IUFRO. Baden-Württemberg : Forstliche Versuchs- und Forschungsanstalt (FVA)-IUFRO, Résumé, 699. ISBN 978-3-902762-88-7 125th IUFRO Anniversary Congress, Freiburg, Allemagne, 18 Septembre 2017/22 Septembre 2017.http://iufro2017.com/wp-content/uploads/2017/11/IUFRO17_Abstract_Book.pdf <http://iufro2017.com/wp-content/uploads/2017/11/IUFRO17_Abstract_Book.pdf> Researchers Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations Laclau, Jean-Paul Gonçalves, José Leonardo M. Ranger, Jacques eng 2017 Forstliche Versuchs- und Forschungsanstalt (FVA) Book of Abstracts IUFRO 125th Anniversary Congress 2017 K10 - Production forestière F04 - Fertilisation Large amounts of fertilizers are applied in tropical planted forests managed in short rotations to sustain high biomass productions in highly weathered soils. Our study aimed to assess the consequences of fertilizer and biosolid additions on groundwater quality and nutrient leaching in Eucalyptus grandis plantations. Soil solutions were continuously sampled in 9 plots using plate lysimeters and ceramic cups at depths of 15, 50, 100 and 300 cm. The solutions were collected every week over 6 years to determine the concentrations of the main anions and cations. Three treatments were studied in 3 blocks: no nitrogen addition (control), 120 kg N ha-1 applied as ammonium sulphate, and 30 t ha-1 of biosolid added containing 1260 kg N ha-1. The main biogeochemical processes controlling the chemistry of gravitational solutions throughout their transfer were identified. The chemical composition of soil solutions in the topsoil was driven by the mineralization of soil organic matter and harvest residues as well as the dissolution of the fertilizers. The peaks of nutrient concentrations reached a depth of 1 m about 9 months after planting but high concentrations never reached a depth of 3 m, except after the last biosolid application. E. grandis trees exhibited a remarkable filter capacity against nutrient leaching as a result of i) a relatively slow transfer of mobile ions in deep soil layers, ii) a very fast root growth (down to > 6 m at 1 year after planting) and iii) a high demand of trees in water and nutrients from 6 months after planting onward. Our results suggest that the number of fertilizations could be reduced in commercial eucalypt plantations growing in deep Ferralsols and that biosolid applications could be adjusted to reach high growth rates without polluting deep water tables. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/586633/1/ID586633.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://iufro2017.com/wp-content/uploads/2017/11/IUFRO17_Abstract_Book.pdf info:eu-repo/semantics/altIdentifier/purl/http://iufro2017.com/wp-content/uploads/2017/11/IUFRO17_Abstract_Book.pdf |
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K10 - Production forestière F04 - Fertilisation K10 - Production forestière F04 - Fertilisation Laclau, Jean-Paul Gonçalves, José Leonardo M. Ranger, Jacques Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
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Large amounts of fertilizers are applied in tropical planted forests managed in short rotations to sustain high biomass productions in highly weathered soils. Our study aimed to assess the consequences of fertilizer and biosolid additions on groundwater quality and nutrient leaching in Eucalyptus grandis plantations. Soil solutions were continuously sampled in 9 plots using plate lysimeters and ceramic cups at depths of 15, 50, 100 and 300 cm. The solutions were collected every week over 6 years to determine the concentrations of the main anions and cations. Three treatments were studied in 3 blocks: no nitrogen addition (control), 120 kg N ha-1 applied as ammonium sulphate, and 30 t ha-1 of biosolid added containing 1260 kg N ha-1. The main biogeochemical processes controlling the chemistry of gravitational solutions throughout their transfer were identified. The chemical composition of soil solutions in the topsoil was driven by the mineralization of soil organic matter and harvest residues as well as the dissolution of the fertilizers. The peaks of nutrient concentrations reached a depth of 1 m about 9 months after planting but high concentrations never reached a depth of 3 m, except after the last biosolid application. E. grandis trees exhibited a remarkable filter capacity against nutrient leaching as a result of i) a relatively slow transfer of mobile ions in deep soil layers, ii) a very fast root growth (down to > 6 m at 1 year after planting) and iii) a high demand of trees in water and nutrients from 6 months after planting onward. Our results suggest that the number of fertilizations could be reduced in commercial eucalypt plantations growing in deep Ferralsols and that biosolid applications could be adjusted to reach high growth rates without polluting deep water tables. |
format |
conference_item |
topic_facet |
K10 - Production forestière F04 - Fertilisation |
author |
Laclau, Jean-Paul Gonçalves, José Leonardo M. Ranger, Jacques |
author_facet |
Laclau, Jean-Paul Gonçalves, José Leonardo M. Ranger, Jacques |
author_sort |
Laclau, Jean-Paul |
title |
Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
title_short |
Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
title_full |
Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
title_fullStr |
Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
title_full_unstemmed |
Consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in Brazilian eucalypt plantations |
title_sort |
consequences of mineral fertilization and biosolid application on nutrient leaching over an entire rotation in brazilian eucalypt plantations |
publisher |
Forstliche Versuchs- und Forschungsanstalt (FVA) |
url |
http://agritrop.cirad.fr/586633/ http://agritrop.cirad.fr/586633/1/ID586633.pdf |
work_keys_str_mv |
AT laclaujeanpaul consequencesofmineralfertilizationandbiosolidapplicationonnutrientleachingoveranentirerotationinbrazilianeucalyptplantations AT goncalvesjoseleonardom consequencesofmineralfertilizationandbiosolidapplicationonnutrientleachingoveranentirerotationinbrazilianeucalyptplantations AT rangerjacques consequencesofmineralfertilizationandbiosolidapplicationonnutrientleachingoveranentirerotationinbrazilianeucalyptplantations |
_version_ |
1758025601725235200 |