Optimizing tillage schedule for maintaining activity of the arbuscular mycorrhizal fungal population in a rainfed upland rice (Oryza sativa L.) agro-ecosystem.
Identifieur interne : 002637 ( Main/Curation ); précédent : 002636; suivant : 002638Optimizing tillage schedule for maintaining activity of the arbuscular mycorrhizal fungal population in a rainfed upland rice (Oryza sativa L.) agro-ecosystem.
Auteurs : D. Maiti [Inde] ; M. Variar ; R K SinghSource :
- Mycorrhiza [ 1432-1890 ] ; 2011.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Oryza.
- microbiologie : Oryza.
- métabolisme : Oryza, Phosphore.
- méthodes : Agriculture.
- physiologie : Champignons, Mycorhizes.
- Microbiologie du sol, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Phosphorus.
- growth & development : Oryza.
- metabolism : Oryza.
- methods : Agriculture.
- microbiology : Oryza.
- physiology : Fungi, Mycorrhizae.
- Ecosystem, Soil Microbiology.
Abstract
Rainfed uplands in India are predominantly mono-cropped with rice (Oryza sativa L.) in the wet season (June/July to September/October) and grown under aerobic soil conditions. The remaining fallow period (winter followed by summer) of about 8-9 months leads to natural crash in the population of native arbuscular mycorrhizal fungi (AMF) in the soil. Attempts have been made to minimize this population crash by reducing soil disturbance-induced deleterious effects on native AMF activity of improperly scheduled off-season tillage, an agronomic recommendation for weed and disease (soil-borne) management, practiced by the upland farmers. On-farm (farmers' field) evaluation of effects of all suitable off-season tillage schedule combinations on rice during wet seasons of 2004, 2005, and 2006 revealed that a maximum of two off-season tillage schedules with a minimum gap of 13 weeks between them minimized the population crash of native AMF with a concomitant increase in phosphorus (P) uptake and grain yield of upland rice (variety "Vandana").
DOI: 10.1007/s00572-010-0324-4
PubMed: 20544229
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pubmed:20544229Le document en format XML
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<term>Oryza (growth & development)</term>
<term>Oryza (metabolism)</term>
<term>Oryza (microbiology)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Agriculture (méthodes)</term>
<term>Champignons (physiologie)</term>
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<term>Mycorhizes (physiologie)</term>
<term>Oryza (croissance et développement)</term>
<term>Oryza (microbiologie)</term>
<term>Oryza (métabolisme)</term>
<term>Phosphore (métabolisme)</term>
<term>Écosystème (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Phosphorus</term>
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<term>Phosphore</term>
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<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Champignons</term>
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<front><div type="abstract" xml:lang="en">Rainfed uplands in India are predominantly mono-cropped with rice (Oryza sativa L.) in the wet season (June/July to September/October) and grown under aerobic soil conditions. The remaining fallow period (winter followed by summer) of about 8-9 months leads to natural crash in the population of native arbuscular mycorrhizal fungi (AMF) in the soil. Attempts have been made to minimize this population crash by reducing soil disturbance-induced deleterious effects on native AMF activity of improperly scheduled off-season tillage, an agronomic recommendation for weed and disease (soil-borne) management, practiced by the upland farmers. On-farm (farmers' field) evaluation of effects of all suitable off-season tillage schedule combinations on rice during wet seasons of 2004, 2005, and 2006 revealed that a maximum of two off-season tillage schedules with a minimum gap of 13 weeks between them minimized the population crash of native AMF with a concomitant increase in phosphorus (P) uptake and grain yield of upland rice (variety "Vandana").</div>
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<Abstract><AbstractText>Rainfed uplands in India are predominantly mono-cropped with rice (Oryza sativa L.) in the wet season (June/July to September/October) and grown under aerobic soil conditions. The remaining fallow period (winter followed by summer) of about 8-9 months leads to natural crash in the population of native arbuscular mycorrhizal fungi (AMF) in the soil. Attempts have been made to minimize this population crash by reducing soil disturbance-induced deleterious effects on native AMF activity of improperly scheduled off-season tillage, an agronomic recommendation for weed and disease (soil-borne) management, practiced by the upland farmers. On-farm (farmers' field) evaluation of effects of all suitable off-season tillage schedule combinations on rice during wet seasons of 2004, 2005, and 2006 revealed that a maximum of two off-season tillage schedules with a minimum gap of 13 weeks between them minimized the population crash of native AMF with a concomitant increase in phosphorus (P) uptake and grain yield of upland rice (variety "Vandana").</AbstractText>
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