green-tuff landslide areas are beneficial for rice nutrition in japan

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ID: 171186
2006
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Abstract
Japanese Islands are covered with weathered volcanic rocks and soils. Terraced rice field are located in green-tuff areas which are very fertile but where landslides occur associated to strong earthquakes. The Xray diffraction and X-ray fluorescence analyses of the soils in landslide area identified predominant smectite and Mg, Al, Si, K, Ti, Mn and Fe are main components. The rice leaf showed that S, Cl, K and Ca play important roles for nutrients in the area. Drainpipe systems have set up in the green- tuff areas to reduce the risks of landslides. Reddish brown microbial mats inhabited bacteria and diatom in the drainpipe outlets. The microbial mats are rich in Fe and PO4(3-). The iron bacteria in the ground water have a high metabolic rate suggesting that the weathering materials were produced by not only physical and chemical influence but also by microorganism. Many microorganisms attach to mineral surfaces and show their high impact in the water mineral chemistry in the landslide area. Bacteria in the green-tuff over landslide area play important roles for sustainable agriculture including rice nutrition.
As Ilhas Japonesas são cobertas de rochas e solos vulcânicos intemperizados. Terraços de campos de arroz estão comumente localizados em áreas de tufos verdes, as quais são férteis, mas estão geralmente sujeitas a trágicos deslizamentos de terra associados a grandes terremotos. As análises dos solos por difração e fluorescência de raios-X em áreas de deslizamento identificam a predominância de esmectitas, cujos componentes principais são Mg, Al, Si, K, Ca, Ti, Mn, e Fe como principais componentes. A palha de arroz mostrou que S, Cl, K, e Ca têm importantes papéis para a nutrição dos solos dessa área. Sistemas de tubos de deslizamento foram instalados nestas áreas detufos verdes de forma a reduzir os riscos de deslizamentos. Nas saídas dos tubos de descarga se formou uma esteira de algas microbianas marrom avermelhadas habitadas por bactérias e diatomácea. Os materiais microbianos são ricos em Fe e PO4(3-). As bactérias das águas subterrâneas são ricas em Fe e têm uma alta taxa metabólicasugerindo que os materiais intemperizados foram produzidos não somente por influência física e química, mas também por micro organismos. Muitos dos microorganismos se prendem às superfícies minerais e apresentam um grande impacto na química mineral da água nas áreas de deslizamento. As bactérias nas áreas de tufos verdes desempenham um importante papel na agricultura sustentável incluindo a nutrição do arroz.
Reference Key
tazaki2006anaisgreen-tuff Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Kazue Tazaki
Journal hypertension (dallas, tex : 1979)
Year 2006
DOI
10.1590/S0001-37652006000400010
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400010
Keywords
landslide

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