No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands
Agricultural practices affect the physical and chemical characteristics of the soil, which in turn may influence soil microorganisms with consequences on soil biological functioning. However, there is little knowledge on the interactions between agriculturalmanagement, soil physicochemical properties, and soil microbial communities, notably in tropical ecosystems with few studies conducted in strongly weathered and acid soils. Here, we investigated the early effect of tillage and crop residues management on top soil physical, chemical, and microbial properties in an acid savannah grassland of northeastern Laos. We initiated a 3-year rotation of rice/corn/ soybean under three no-till systems (NTs) distinguished by the cover crops associated prior to and with the main crops, and one conventional tillage-based system (CT). The effect of agricultural management was evaluated 2 years after land reclamation in reference to the surrounding natural pasture (PAS). Our results demonstrate that NTs improve soil physicochemical characteristics (aggregate stability, organic carbon, and cation exchange capacity) as well as microbial abundance (total biomass, bacterial and fungal densities). A significant discrimination of the genetic structure of soil bacterial community was also observed between NTs, CT, and PAS. Interestingly, bacterial abundance and diversity were differently influenced by soil environment changes: microbial density was affected by the quantity and diversity of crop residues, soil organic carbon, and exchangeable base contents, whereas soil bacterial genetic structure was mainly determined by exchangeable aluminum content, pH, cation exchange capacity, and C/N ratio. Altogether, our study represents one of the most complete environmental evaluations of agricultural practices in tropical agrosystems and leads to recommend no-till systems with high residue restitutions to improve the physical, chemical, and microbial properties of tropical acid soils and thus contribute to the sustainability of agriculture in these ecosystems.
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F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 http://aims.fao.org/aos/agrovoc/c_12076 F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 http://aims.fao.org/aos/agrovoc/c_12076 |
spellingShingle |
F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 http://aims.fao.org/aos/agrovoc/c_12076 F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 http://aims.fao.org/aos/agrovoc/c_12076 Lienhard, Pascal Tivet, Florent Chabanne, André Dequiedt, Samuel Lelièvre, Mélanie Sayphoummie, Sengpanh Leudphanane, Bounma Prévost-Bouré, Nicolas Chemidlin Séguy, Lucien Maron, Pierre-Alain Ranjard, Lionel No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
description |
Agricultural practices affect the physical and chemical characteristics of the soil, which in turn may influence soil microorganisms with consequences on soil biological functioning. However, there is little knowledge on the interactions between agriculturalmanagement, soil physicochemical properties, and soil microbial communities, notably in tropical ecosystems with few studies conducted in strongly weathered and acid soils. Here, we investigated the early effect of tillage and crop residues management on top soil physical, chemical, and microbial properties in an acid savannah grassland of northeastern Laos. We initiated a 3-year rotation of rice/corn/ soybean under three no-till systems (NTs) distinguished by the cover crops associated prior to and with the main crops, and one conventional tillage-based system (CT). The effect of agricultural management was evaluated 2 years after land reclamation in reference to the surrounding natural pasture (PAS). Our results demonstrate that NTs improve soil physicochemical characteristics (aggregate stability, organic carbon, and cation exchange capacity) as well as microbial abundance (total biomass, bacterial and fungal densities). A significant discrimination of the genetic structure of soil bacterial community was also observed between NTs, CT, and PAS. Interestingly, bacterial abundance and diversity were differently influenced by soil environment changes: microbial density was affected by the quantity and diversity of crop residues, soil organic carbon, and exchangeable base contents, whereas soil bacterial genetic structure was mainly determined by exchangeable aluminum content, pH, cation exchange capacity, and C/N ratio. Altogether, our study represents one of the most complete environmental evaluations of agricultural practices in tropical agrosystems and leads to recommend no-till systems with high residue restitutions to improve the physical, chemical, and microbial properties of tropical acid soils and thus contribute to the sustainability of agriculture in these ecosystems. |
format |
article |
topic_facet |
F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 http://aims.fao.org/aos/agrovoc/c_12076 |
author |
Lienhard, Pascal Tivet, Florent Chabanne, André Dequiedt, Samuel Lelièvre, Mélanie Sayphoummie, Sengpanh Leudphanane, Bounma Prévost-Bouré, Nicolas Chemidlin Séguy, Lucien Maron, Pierre-Alain Ranjard, Lionel |
author_facet |
Lienhard, Pascal Tivet, Florent Chabanne, André Dequiedt, Samuel Lelièvre, Mélanie Sayphoummie, Sengpanh Leudphanane, Bounma Prévost-Bouré, Nicolas Chemidlin Séguy, Lucien Maron, Pierre-Alain Ranjard, Lionel |
author_sort |
Lienhard, Pascal |
title |
No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
title_short |
No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
title_full |
No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
title_fullStr |
No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
title_full_unstemmed |
No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands |
title_sort |
no-till and cover crops shift soil microbial abundance and diversity in laos tropical grasslands |
url |
http://agritrop.cirad.fr/569028/ http://agritrop.cirad.fr/569028/1/document_569028.pdf |
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1806036957896114176 |
spelling |
dig-cirad-fr-5690282024-06-28T16:02:47Z http://agritrop.cirad.fr/569028/ http://agritrop.cirad.fr/569028/ No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands. Lienhard Pascal, Tivet Florent, Chabanne André, Dequiedt Samuel, Lelièvre Mélanie, Sayphoummie Sengpanh, Leudphanane Bounma, Prévost-Bouré Nicolas Chemidlin, Séguy Lucien, Maron Pierre-Alain, Ranjard Lionel. 2013. Agronomy for Sustainable Development, 33 (2) : 375-384.https://doi.org/10.1007/s13593-012-0099-4 <https://doi.org/10.1007/s13593-012-0099-4> No-till and cover crops shift soil microbial abundance and diversity in Laos tropical grasslands Lienhard, Pascal Tivet, Florent Chabanne, André Dequiedt, Samuel Lelièvre, Mélanie Sayphoummie, Sengpanh Leudphanane, Bounma Prévost-Bouré, Nicolas Chemidlin Séguy, Lucien Maron, Pierre-Alain Ranjard, Lionel eng 2013 Agronomy for Sustainable Development F07 - Façons culturales F08 - Systèmes et modes de culture P34 - Biologie du sol P33 - Chimie et physique du sol Q70 - Traitement des déchets agricoles non-travail du sol travail du sol culture sous couvert végétal micro-organisme du sol sol tropical agroécosystème fertilité du sol propriété physicochimique du sol gestion des déchets résidu de récolte Oryza sativa Zea mays Glycine max http://aims.fao.org/aos/agrovoc/c_8511 http://aims.fao.org/aos/agrovoc/c_7771 http://aims.fao.org/aos/agrovoc/c_25706 http://aims.fao.org/aos/agrovoc/c_36167 http://aims.fao.org/aos/agrovoc/c_7978 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_7170 http://aims.fao.org/aos/agrovoc/c_7182 http://aims.fao.org/aos/agrovoc/c_34763 http://aims.fao.org/aos/agrovoc/c_16118 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_3301 République démocratique populaire lao http://aims.fao.org/aos/agrovoc/c_12076 Agricultural practices affect the physical and chemical characteristics of the soil, which in turn may influence soil microorganisms with consequences on soil biological functioning. However, there is little knowledge on the interactions between agriculturalmanagement, soil physicochemical properties, and soil microbial communities, notably in tropical ecosystems with few studies conducted in strongly weathered and acid soils. Here, we investigated the early effect of tillage and crop residues management on top soil physical, chemical, and microbial properties in an acid savannah grassland of northeastern Laos. We initiated a 3-year rotation of rice/corn/ soybean under three no-till systems (NTs) distinguished by the cover crops associated prior to and with the main crops, and one conventional tillage-based system (CT). The effect of agricultural management was evaluated 2 years after land reclamation in reference to the surrounding natural pasture (PAS). Our results demonstrate that NTs improve soil physicochemical characteristics (aggregate stability, organic carbon, and cation exchange capacity) as well as microbial abundance (total biomass, bacterial and fungal densities). A significant discrimination of the genetic structure of soil bacterial community was also observed between NTs, CT, and PAS. Interestingly, bacterial abundance and diversity were differently influenced by soil environment changes: microbial density was affected by the quantity and diversity of crop residues, soil organic carbon, and exchangeable base contents, whereas soil bacterial genetic structure was mainly determined by exchangeable aluminum content, pH, cation exchange capacity, and C/N ratio. Altogether, our study represents one of the most complete environmental evaluations of agricultural practices in tropical agrosystems and leads to recommend no-till systems with high residue restitutions to improve the physical, chemical, and microbial properties of tropical acid soils and thus contribute to the sustainability of agriculture in these ecosystems. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/569028/1/document_569028.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s13593-012-0099-4 10.1007/s13593-012-0099-4 info:eu-repo/semantics/altIdentifier/doi/10.1007/s13593-012-0099-4 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s13593-012-0099-4 |