Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations
The transport of water from moist soil layers to dry through the roots of some species is an important process for plant survival during long dry periods. The objective of the present study was to evaluate if Eucalyptus grandis roots growing in a tropical region characterized by long dry periods passively move water from deep to shallow soil layers, which is known as “hydraulic redistribution”. The experiment was carried out at the Itatinga experimental station (SP, Brazil) that included four contrasting experimental plots resulting from the combination of two set of treatments: with/without potassium fertilization (+K/-K, respectively) and with/without throughfall exclusion (+W/-W, respectively). Sap flow was measured in superficial Eucalyptus coarse roots from the end of the 2014 dry season to the end of the 2015 rainy. We detected reverse sap flow (water in superficial roots going to the soil surface far from the trunks) all of the months, even during the rainy season, and in all the treatments, except in -K-W, where reverse flow started two months after the beginning of the rains (January). The lowest flow densities in superficial roots were observed in -K and/or -W, but reverse flow occurred in more roots or during more days per month than in treatments +K and +W.
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Subjects: | K10 - Production forestière, F04 - Fertilisation, F62 - Physiologie végétale - Croissance et développement, |
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dig-cirad-fr-5797912022-01-25T07:17:10Z http://agritrop.cirad.fr/579791/ http://agritrop.cirad.fr/579791/ Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations. Asensio Verónica, Laclau Jean-Paul, Domec Jean-Christophe, Jordan-Meille Lionel, Bouillet Jean-Pierre, Nouvellon Yann, Abreu-Junior Cassio Hamilton. 2015. . Natal : Sociedade Brasileiro de ciência do solo, 1 p. Congresso Brasileiro de ciência do solo. 35, Natal, Brésil, 2 Août 2015/7 Août 2015.https://eventosolos.org.br/cbcs2015/anais/ <https://eventosolos.org.br/cbcs2015/anais/> Researchers Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations Asensio, Verónica Laclau, Jean-Paul Domec, Jean-Christophe Jordan-Meille, Lionel Bouillet, Jean-Pierre Nouvellon, Yann Abreu-Junior, Cassio Hamilton eng 2015 Sociedade Brasileiro de ciência do solo K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement The transport of water from moist soil layers to dry through the roots of some species is an important process for plant survival during long dry periods. The objective of the present study was to evaluate if Eucalyptus grandis roots growing in a tropical region characterized by long dry periods passively move water from deep to shallow soil layers, which is known as “hydraulic redistribution”. The experiment was carried out at the Itatinga experimental station (SP, Brazil) that included four contrasting experimental plots resulting from the combination of two set of treatments: with/without potassium fertilization (+K/-K, respectively) and with/without throughfall exclusion (+W/-W, respectively). Sap flow was measured in superficial Eucalyptus coarse roots from the end of the 2014 dry season to the end of the 2015 rainy. We detected reverse sap flow (water in superficial roots going to the soil surface far from the trunks) all of the months, even during the rainy season, and in all the treatments, except in -K-W, where reverse flow started two months after the beginning of the rains (January). The lowest flow densities in superficial roots were observed in -K and/or -W, but reverse flow occurred in more roots or during more days per month than in treatments +K and +W. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/579791/7/921.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://eventosolos.org.br/cbcs2015/anais/ info:eu-repo/semantics/altIdentifier/purl/https://eventosolos.org.br/cbcs2015/anais/ |
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K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement |
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K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement Asensio, Verónica Laclau, Jean-Paul Domec, Jean-Christophe Jordan-Meille, Lionel Bouillet, Jean-Pierre Nouvellon, Yann Abreu-Junior, Cassio Hamilton Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
description |
The transport of water from moist soil layers to dry through the roots of some species is an important process for plant survival during long dry periods. The objective of the present study was to evaluate if Eucalyptus grandis roots growing in a tropical region characterized by long dry periods passively move water from deep to shallow soil layers, which is known as “hydraulic redistribution”. The experiment was carried out at the Itatinga experimental station (SP, Brazil) that included four contrasting experimental plots resulting from the combination of two set of treatments: with/without potassium fertilization (+K/-K, respectively) and with/without throughfall exclusion (+W/-W, respectively). Sap flow was measured in superficial Eucalyptus coarse roots from the end of the 2014 dry season to the end of the 2015 rainy. We detected reverse sap flow (water in superficial roots going to the soil surface far from the trunks) all of the months, even during the rainy season, and in all the treatments, except in -K-W, where reverse flow started two months after the beginning of the rains (January). The lowest flow densities in superficial roots were observed in -K and/or -W, but reverse flow occurred in more roots or during more days per month than in treatments +K and +W. |
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conference_item |
topic_facet |
K10 - Production forestière F04 - Fertilisation F62 - Physiologie végétale - Croissance et développement |
author |
Asensio, Verónica Laclau, Jean-Paul Domec, Jean-Christophe Jordan-Meille, Lionel Bouillet, Jean-Pierre Nouvellon, Yann Abreu-Junior, Cassio Hamilton |
author_facet |
Asensio, Verónica Laclau, Jean-Paul Domec, Jean-Christophe Jordan-Meille, Lionel Bouillet, Jean-Pierre Nouvellon, Yann Abreu-Junior, Cassio Hamilton |
author_sort |
Asensio, Verónica |
title |
Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
title_short |
Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
title_full |
Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
title_fullStr |
Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
title_full_unstemmed |
Effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in Eucalyptus grandis plantations |
title_sort |
effects of potassium fertilization and throughfall exclusion on the hydraulic redistribution of soil water in eucalyptus grandis plantations |
publisher |
Sociedade Brasileiro de ciência do solo |
url |
http://agritrop.cirad.fr/579791/ http://agritrop.cirad.fr/579791/7/921.pdf |
work_keys_str_mv |
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