Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils
Eucalyptus is the tree most widely planted in tropical countries to satisfy growing demand for wood products, but high yields require high fertilizer inputs. Introducing N2-fixing trees (NFT), such as Acacia mangium, has been proposed to improve soil fertility and aboveground tree biomass in Eucalyptus plantations. In addition to N inputs, NFT species may increase plant P nutrition through increased rates of organic P (Po) cycling. However, the positive effect of acacia on soil P availability and plant P nutrition was found to vary substantially between sites. The ability of acacia to improve P bioavailability might mainly depend on Po sequestration in microbial biomass, preventing Po mineralization by phosphatases and efficient Po recycling. This hypothesis was tested at two tropical sites, Itatinga (Brazil) and Kissoko (Congo) by measuring inorganic phosphate (Pi), Po and enzyme-labile Po in bicarbonate extracts from the topsoil collected from plots with Eucalyptus, acacias, or native vegetation. We used bicarbonate enzyme-labile Po after soil autoclaving as an indicator of microbial Po, and a Eucalyptus bioassay to measure the actual P bioavailability for Eucalyptus seedlings. At Itatinga, bicarbonate-Pi was very low, while Po was the main P form. Enzyme-labile Po was very weak in intact soils and high in autoclaved soils, indicating high immobilization in microbial biomass. At Kissoko, Po was highly enzyme-labile in both intact and autoclaved soils, especially from acacia plots, suggesting very low Po immobilization in microbial biomass. Growth and P accumulations in Eucalyptus seedlings were low in all soils at Itatinga and were the highest in Eucalyptus plants grown in acacia soils at Kissoko. Our results highlight the potential of acacia trees for improving P bioavailability for other tree species if labile Po enrichment in the soil provided by this N2-fixing tree is not locked into the microbial biomass.
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Francia |
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dig-cirad-fr |
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Europa del Oeste |
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Biblioteca del CIRAD Francia |
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eng |
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K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 |
spellingShingle |
K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 Waithaisong, Kittima Robin, Agnès L'Huillery, Valentin Abadie, Josiane Sauvage, François-Xavier Chemardin, Patrick Mareschal, Louis Bouillet, Jean-Pierre Laclau, Jean-Paul Moraes Gonçalves, José Leonardo Plassard, Claude Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
description |
Eucalyptus is the tree most widely planted in tropical countries to satisfy growing demand for wood products, but high yields require high fertilizer inputs. Introducing N2-fixing trees (NFT), such as Acacia mangium, has been proposed to improve soil fertility and aboveground tree biomass in Eucalyptus plantations. In addition to N inputs, NFT species may increase plant P nutrition through increased rates of organic P (Po) cycling. However, the positive effect of acacia on soil P availability and plant P nutrition was found to vary substantially between sites. The ability of acacia to improve P bioavailability might mainly depend on Po sequestration in microbial biomass, preventing Po mineralization by phosphatases and efficient Po recycling. This hypothesis was tested at two tropical sites, Itatinga (Brazil) and Kissoko (Congo) by measuring inorganic phosphate (Pi), Po and enzyme-labile Po in bicarbonate extracts from the topsoil collected from plots with Eucalyptus, acacias, or native vegetation. We used bicarbonate enzyme-labile Po after soil autoclaving as an indicator of microbial Po, and a Eucalyptus bioassay to measure the actual P bioavailability for Eucalyptus seedlings. At Itatinga, bicarbonate-Pi was very low, while Po was the main P form. Enzyme-labile Po was very weak in intact soils and high in autoclaved soils, indicating high immobilization in microbial biomass. At Kissoko, Po was highly enzyme-labile in both intact and autoclaved soils, especially from acacia plots, suggesting very low Po immobilization in microbial biomass. Growth and P accumulations in Eucalyptus seedlings were low in all soils at Itatinga and were the highest in Eucalyptus plants grown in acacia soils at Kissoko. Our results highlight the potential of acacia trees for improving P bioavailability for other tree species if labile Po enrichment in the soil provided by this N2-fixing tree is not locked into the microbial biomass. |
format |
article |
topic_facet |
K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 |
author |
Waithaisong, Kittima Robin, Agnès L'Huillery, Valentin Abadie, Josiane Sauvage, François-Xavier Chemardin, Patrick Mareschal, Louis Bouillet, Jean-Pierre Laclau, Jean-Paul Moraes Gonçalves, José Leonardo Plassard, Claude |
author_facet |
Waithaisong, Kittima Robin, Agnès L'Huillery, Valentin Abadie, Josiane Sauvage, François-Xavier Chemardin, Patrick Mareschal, Louis Bouillet, Jean-Pierre Laclau, Jean-Paul Moraes Gonçalves, José Leonardo Plassard, Claude |
author_sort |
Waithaisong, Kittima |
title |
Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
title_short |
Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
title_full |
Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
title_fullStr |
Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
title_full_unstemmed |
Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils |
title_sort |
organic phosphorus immobilization in microbial biomass controls how n2-fixing trees affect phosphorus bioavailability in two tropical soils |
url |
http://agritrop.cirad.fr/601083/ http://agritrop.cirad.fr/601083/1/Waithsaisong-Env_Advances-2022-Organic%20phosphorus%20immobilization%20in%20microbial%20biomass%20controls%20how%20N2-fixing%20trees%20affect%20phosphorus%20bioavailability%20in%20two%20tropical%20soils.pdf |
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spelling |
dig-cirad-fr-6010832024-01-29T04:10:41Z http://agritrop.cirad.fr/601083/ http://agritrop.cirad.fr/601083/ Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils. Waithaisong Kittima, Robin Agnès, L'Huillery Valentin, Abadie Josiane, Sauvage François-Xavier, Chemardin Patrick, Mareschal Louis, Bouillet Jean-Pierre, Laclau Jean-Paul, Moraes Gonçalves José Leonardo, Plassard Claude. 2022. Environmental Advanceshttps://doi.org/10.1016/j.envadv.2022.100247 <https://doi.org/10.1016/j.envadv.2022.100247> Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils Waithaisong, Kittima Robin, Agnès L'Huillery, Valentin Abadie, Josiane Sauvage, François-Xavier Chemardin, Patrick Mareschal, Louis Bouillet, Jean-Pierre Laclau, Jean-Paul Moraes Gonçalves, José Leonardo Plassard, Claude eng 2022 Environmental Advances K10 - Production forestière F04 - Fertilisation F08 - Systèmes et modes de culture Eucalyptus arbre fixateur d'azote Acacia mangium culture associée phosphore organique phosphore enzyme biodisponibilité sol tropical http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_35228 http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4911ce06 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2603 http://aims.fao.org/aos/agrovoc/c_32390 http://aims.fao.org/aos/agrovoc/c_7978 Brésil Congo http://aims.fao.org/aos/agrovoc/c_1070 http://aims.fao.org/aos/agrovoc/c_1811 Eucalyptus is the tree most widely planted in tropical countries to satisfy growing demand for wood products, but high yields require high fertilizer inputs. Introducing N2-fixing trees (NFT), such as Acacia mangium, has been proposed to improve soil fertility and aboveground tree biomass in Eucalyptus plantations. In addition to N inputs, NFT species may increase plant P nutrition through increased rates of organic P (Po) cycling. However, the positive effect of acacia on soil P availability and plant P nutrition was found to vary substantially between sites. The ability of acacia to improve P bioavailability might mainly depend on Po sequestration in microbial biomass, preventing Po mineralization by phosphatases and efficient Po recycling. This hypothesis was tested at two tropical sites, Itatinga (Brazil) and Kissoko (Congo) by measuring inorganic phosphate (Pi), Po and enzyme-labile Po in bicarbonate extracts from the topsoil collected from plots with Eucalyptus, acacias, or native vegetation. We used bicarbonate enzyme-labile Po after soil autoclaving as an indicator of microbial Po, and a Eucalyptus bioassay to measure the actual P bioavailability for Eucalyptus seedlings. At Itatinga, bicarbonate-Pi was very low, while Po was the main P form. Enzyme-labile Po was very weak in intact soils and high in autoclaved soils, indicating high immobilization in microbial biomass. At Kissoko, Po was highly enzyme-labile in both intact and autoclaved soils, especially from acacia plots, suggesting very low Po immobilization in microbial biomass. Growth and P accumulations in Eucalyptus seedlings were low in all soils at Itatinga and were the highest in Eucalyptus plants grown in acacia soils at Kissoko. Our results highlight the potential of acacia trees for improving P bioavailability for other tree species if labile Po enrichment in the soil provided by this N2-fixing tree is not locked into the microbial biomass. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/601083/1/Waithsaisong-Env_Advances-2022-Organic%20phosphorus%20immobilization%20in%20microbial%20biomass%20controls%20how%20N2-fixing%20trees%20affect%20phosphorus%20bioavailability%20in%20two%20tropical%20soils.pdf text cc_by_nc_nd info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/4.0/ https://doi.org/10.1016/j.envadv.2022.100247 10.1016/j.envadv.2022.100247 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envadv.2022.100247 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.envadv.2022.100247 |