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  • 1
    Language: English
    In: Paddy and Water Environment, 2018, Vol.16(2), pp.243-252
    Description: Silicon (Si) mitigates abiotic and biotic stresses for rice plants ( Oryza sativa L.). Here, we test relationships between Si cycling, plant growth, and pest and fungal attacks in rice agroecosystems. We conducted a plot experiment on Si fertilization in a Southern Vietnamese paddy, where plant-available Si was inherently low. For two cropping seasons, we investigated the temporal dynamics of Si in soil solution, plant Si uptake, and the occurrence of leaf folders ( Cnaphalocrocis medinalis ) and rice blast caused by the fungus Magnaporthe oryzae . Silicon application increased Si concentrations in soil solutions collected in the field as expected from previous laboratory experiments. Soil solution Si concentrations were furthermore affected by Si uptake by plants and by recycling Si with rice straw ash. Silicon concentrations in rice leaves at tillering stage increased with increasing Si application. However, surprisingly, no relationship between Si in soil solution and Si concentration in straw at maturity stage was found. The occurrences of leaf folders and rice blast disease were mitigated by increased Si uptake. However, rice biomass production was not affected, probably because the biotic stress level was generally low. Our field data emphasize the importance of recycling crop residues in rice fields for the Si supply to plants, especially in regions with low Si availability. They furthermore show that under field conditions, the relationship between dissolved Si in soil solution and Si uptake by rice plants is not as straightforward as expected and thus needs to be further investigated.
    Keywords: Dissolved silicon ; Leaf folder ; Rice ; Rice blast ; Silicon fertilization
    ISSN: 1611-2490
    E-ISSN: 1611-2504
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  • 2
    Language: English
    In: Paddy and Water Environment, 2018, Vol.16(2), pp.353-358
    Description: Two major human-made problems in rice production systems in the north of Vietnam concern the low plant-available silicon content of soils and the low biodiversity. The results of the LEGATO project suggest a change to an environmentally friendly rice production system that will help to recover biodiversity. We propose here a framework for a demonstration and dissemination model that will be exemplary for the farmers once it has been successfully realized. We advocate local-option models in different districts to demonstrate to farmers. The methods should be adapted to local and ecoregional differences in climate and land-use tradition, and they explicitly take into account soil care, organic fertilizer, manual weeding, native nectar-rich plant bunds, manual pest snail collection, hymenopteran nesting aids, and biodiversity and yield monitoring.
    Keywords: Biodiversity ; Silicon ; Rice field ; North Vietnam
    ISSN: 1611-2490
    E-ISSN: 1611-2504
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  • 3
    Language: English
    In: Basic and Applied Ecology, December 2015, Vol.16(8), pp.661-664
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.baae.2015.10.003 Byline: Josef Settele, Joachim H. Spangenberg, Kong Luen Heong, Benjamin Burkhard, Jesus Victor Bustamante, Jimmy Cabbigat, Ho Van Chien, Monina Escalada, Volker Grescho, Le Huu Hai, Alexander Harpke, Finbarr G. Horgan, Stefan Hotes, Reinhold Jahn, Ingolf Kuhn, Leonardo Marquez, Martin Schadler, Vera Tekken, Doris Vetterlein, Sylvia "Bong" Villareal, Catrin Westphal, Martin Wiemers Author Affiliation: (a) UFZ -- Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle, Germany (b) iDiv, German Centre for Integrative Biodiversity Research, Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany (c) Sustainable Europe Research Institute SERI Germany e.V., Vorsterstr. 97-99, 51103 Cologne, Germany (d) IRRI -- International Rice Research Institute, Los Banos, DAPO, 7777 Metro Manila, Philippines (e) Institute for Natural Resource Conservation, Kiel University, Olshausenstra[sz]e 40, 24098 Kiel, Germany (f) Leibniz Centre for Agricultural Landscape Research ZALF, Eberswalder Str. 84, 15374 Muncheberg, Germany (g) LEGATO Office, 3601 Banaue, Ifugao, Philippines (h) Ministry of Agriculture and Rural Development Vietnam, Tien Giang, Vietnam (i) Department of Development Communication, Visayas State University, Visca, Baybay 6521, Leyte, Philippines (j) OLANIS GmbH, Pittlerstra[sz]e 33, 04159 Leipzig, Germany (k) Tien Giang University, My Tho, Vietnam (l) General and Animal Ecology, Biology, Philipps-University Marburg, Karl-v.-Frisch-Str. 8, 35043 Marburg, Germany (m) Chair of Soil Science, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 3, 06120 Halle, Germany (n) Crop Protection Division, Philippine Rice Research Institute, Maligaya, Munoz, Nueva Ecija, Philippines (o) Institute for Geography and Geology, Ernst-Moritz-Arndt University Greifswald, Friedrich-Ludwig-Jahn-Str. 16, 17487 Greifswald, Germany (p) Agorecology, Georg-August University Gottingen, Grisebachstrasse 6, 37077 Gottingen, Germany (q) Zhejiang University, Hangzhou, PR China Article History: Received 13 October 2015; Accepted 17 October 2015
    Keywords: Ecological Engineering ; Landscape Structure ; Media Campaigns ; Nutrients ; Pest Control ; Philippines ; Pollination ; Silicon ; Sustainable Land Use ; Vietnam ; Environmental Sciences ; Biology ; Ecology
    ISSN: 1439-1791
    E-ISSN: 16180089
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  • 4
    Language: English
    In: Paddy and Water Environment, 2018, Vol.16(2), pp.211-224
    Keywords: Life Sciences ; Agriculture ; Hydrology/Water Resources ; Hydrogeology ; Geoecology/Natural Processes ; Ecotoxicology ; Soil Science & Conservation ; Agriculture;
    ISSN: 1611-2490
    E-ISSN: 1611-2504
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