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Article

Rice Paddy Soil Seedbanks Composition in a Mediterranean Wetland and the Influence of Winter Flooding

Department of Plant Production, Universitat Politècnica de València, 46022 València, Spain
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Academic Editors: Jose L. Gonzalez-Andujar and Guillermo R. Chantre
Agronomy 2021, 11(6), 1199; https://doi.org/10.3390/agronomy11061199
Received: 11 May 2021 / Revised: 7 June 2021 / Accepted: 10 June 2021 / Published: 12 June 2021
(This article belongs to the Special Issue Weed Population Dynamics)
Soil seedbanks are defined in composition and quantity by many environmental factors inherent to a specific area, and they can be an indicator of the potential problems of weeds in crops. In Valencia (Spain), rice is cultivated with continuous flooding during the growing season, and after harvesting, many of the paddy fields are flooded again during the winter. This study investigates the paddy fields’ soil seedbank composition in this Mediterranean paddy area and the effect of winter flooding on the soil seedbank. Multispectral images from the Sentinel-2 satellite were used to characterise the water level of paddies in winter. Satellite images facilitated the characterisation of winter flooding in fields. Soil samples from sixty-nine points distributed over 15,000 ha of paddies were used to determine the composition of the seedbank plots. The data were spatially represented by geographic information systems. The species that contributed most to the paddy seedbank were Cyperus difformis L., an important rice weed in the Mediterranean area, and other rice weeds such as Echinochloa sp. and Leptochloa fusca subspecies. Other species with a great contribution to the seedbank are species that develop in paddy fields that produce a large quantity of small seeds, such as Lemna sp., Polypogon monspeliensis (L.) Desf., and Nasturtium officinale R. Br. These species interfere little or do not interfere with the rice crop. The study revealed that in general, flooding reduced seedbank density with differences between species. Furthermore, the influence of winter flooding on the different plant species obtained as well as their distribution maps are a further step in this protected area from the point of view of weed management in rice crop, as well as in the management of this Mediterranean wetland. View Full-Text
Keywords: rice weeds; Sentinel-2; multispectral images; remote sensing; seed germination; Cyperus difformis; Echinochloa; Leptochloa fusca; Albufera rice weeds; Sentinel-2; multispectral images; remote sensing; seed germination; Cyperus difformis; Echinochloa; Leptochloa fusca; Albufera
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MDPI and ACS Style

Osca, J.M.; Galán, F.; Moreno-Ramón, H. Rice Paddy Soil Seedbanks Composition in a Mediterranean Wetland and the Influence of Winter Flooding. Agronomy 2021, 11, 1199. https://doi.org/10.3390/agronomy11061199

AMA Style

Osca JM, Galán F, Moreno-Ramón H. Rice Paddy Soil Seedbanks Composition in a Mediterranean Wetland and the Influence of Winter Flooding. Agronomy. 2021; 11(6):1199. https://doi.org/10.3390/agronomy11061199

Chicago/Turabian Style

Osca, José M., Felip Galán, and Héctor Moreno-Ramón. 2021. "Rice Paddy Soil Seedbanks Composition in a Mediterranean Wetland and the Influence of Winter Flooding" Agronomy 11, no. 6: 1199. https://doi.org/10.3390/agronomy11061199

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