Growing Australian Rice in Non‐Flooded Soil Increases Water Use Efficiency and Mycorrhizal Colonisation, but Reduces Grain Micronutrient Concentrations
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Le résumé fourni par la source
ABSTRACT Climate change is driving a global shift from flooded (anaerobic) to dryland/rainfed (aerobic) rice production. While aerobic systems reduce water use and methane emissions, they can exacerbate soil zinc (Zn) and iron (Fe) deficiencies due to altered redox conditions. Arbuscular mycorrhizal (AM) fungi are more effective at colonising and functioning in aerobic soil and may enhance host plant water use efficiency (WUE) and micronutrient uptake in nutrient‐limited soils. We assessed the potential for AM fungi to support aerobic rice growth compared to flooded conditions, in combination with Zn fertiliser treatments. Two Australian rice cultivars, Topaz and Viand, were grown under three watering conditions (flooded, 60% or 80% of soil field capacity [FC]) using a precision irrigation platform. Plants were inoculated with AM fungi ( Rhizophagus irregularis) or not inoculated, and Zn was applied at 0 or 5 mg Zn kg⁻¹ soil. At plant maturity, the grain yield, water use, WUE and concentrations of grain Zn were measured. Both rice cultivars produced significantly more grain under aerobic soil conditions than flooded, with improved WUE. AM fungal inoculation led to reduced water use in Viand under 60% and 80% FC. However, reduced water use in mycorrhizal Viand plants was in line with lower grain yield in those plants, so WUE did not increase. Zn fertilisation enhanced grain Zn concentrations of Topaz and Viand grown in both aerobic treatments, but not under flooded conditions. However, the combination of Zn fertilisation and AM fungi reduced grain Fe concentration in all watering conditions, indicating an antagonistic Zn–Fe relationship. These findings support the potential adaptability of Topaz and Viand to aerobic production. Future research should explore integrated nutrient strategies to mitigate the trade‐off between Zn and Fe in rice grain, and the potential of AM fungi to contribute to WUE.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Growing Australian Rice in Non‐Flooded Soil Increases Water Use Efficiency and Mycorrhizal Colonisation, but Reduces Grain Micronutrient Concentrations
- Date Crossref
- 08/04/2026
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Hue University pays non établi dans la noticeUniversité ou école supérieure
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Australian Wine Research Institute pays non établi dans la noticeStructure de recherche
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Australian Centre for Plant Functional Genomics pays non établi dans la noticeStructure de recherche
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The University of Melbourne pays non établi dans la noticeUniversité ou école supérieure
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Wageningen University & Research pays non établi dans la noticeUniversité ou école supérieure
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The Waite Research Institute and The School of Agriculture pays non établi dans la noticeUniversité ou école supérieure
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The Plant Accelerator University of Adelaide Adelaide South Australia Australia Australian Plant Phenomics Network pays non établi dans la noticeUniversité ou école supérieure
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Centre for Crop Systems Analysis Wageningen University and Research Wageningen the Netherlands pays non établi dans la noticeUniversité ou école supérieure
Hue University, Australian Wine Research Institute et Australian Centre for Plant Functional Genomics, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.