Potassium Capacity To Supply
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Rochas moídas como fontes de potássio para o milho em solo de cerrado.
RESUMO: Três rochas foram avaliadas quanto à capacidade de fornecer potássio para o crescimento inicial do milho, num Latossolo Vermelho-Amarelo argiloso, em condições de casa de vegetação. As rochas biotita xisto, brecha alcalina e ultramáfica alcalina foram moídas (< 0,3 mm) e comparadas à fonte cloreto de potássio, nas doses de 50, 100 e 150 mg
Planaltina. Publicado em: 2011
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2. Formas de potassio em solos do estado do parana e sua disponibilidade para as plantas em cultivos sucessivos / Forms of potassium in soils of the state of parana and their availability to plants in successive crops
A absorÃÃo de K pelas plantas, em geral, e maior que a quantidade inicial de K trocÃvel, indicando que formas nÃo-trocÃveis contribuem no suprimento deste nutriente as plantas. Assim, o presente trabalho teve como objetivos (a) determinar as formas de K total, K nÃo-trocÃvel, K trocÃvel e K na soluÃÃo do solo; (b) determinar o poder tampÃo de pot�
Publicado em: 2010
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3. DISPONIBILIDADE DE POTÁSSIO AFETADA POR CULTIVOS EM SOLOS COM LONGO HISTÓRICO DE ADUBAÇÃO / POTASSIUM AVAILABILITY AFFECTED FOR SUCCESSIVE CULTIVATIONS IN SOILS WITH LONG THERM FERTILIZATION
In soils containing minerals with potassium in non-exchangeable forms, crops uptake a larger amount of this nutrient than that the chemical method can extract, making more difficult the establishment of availability classes and sufficiency levels for potassium. The aims of this study were: a) investigate crop response with potassic fertilization in an Ultiso
Publicado em: 2008
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4. Availability and accumulation of potassium, calcium and magnesium in crops of eucalyptus in several forest sites / Disponibilidade e acúmulo de potássio, cálcio e magnésio em plantações de eucalipto em diversos sítios florestais
The knowledge of the alterations of the nutrient contents in the soil compartments, caused by the variations in the changeable and non-changeable forms over time and the relation of these nutrients with the nutrient export by the eucalyptus, may provide safe indications as to the use of soils and, therefore, of the forest sites studied and, consequently, all
Publicado em: 2008
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5. Soybean productivity and response to different agricultural practices in cerrrado soils with different textures / Produtividade de soja e resposta a técnicas de cultivo em solos de cerrado com diferentes texturas
In recent years, agriculture has been marked by the advance of soybean production on coarser soils from the cerrado region, considered improper for this activity. This fact gives rise to several questions regarding the sustainability and the technical, economical and environmental viability of soybean production. Additionally, different responses to the appl
Publicado em: 2006
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6. Signals Regulating the Expression of the Nuclear Gene Encoding Alternative Oxidase of Plant Mitochondria.
Suspension cells of tobacco (Nicotiana tabacum L. cv Bright Yellow) were used to investigate signals regulating the expression of the nuclear gene Aox1 encoding the mitochondrial alternative oxidase (AOX) protein responsible for cyanide-resistant respiration in plants. We found that an increase in the tricarboxylic acid cycle intermediate citrate (either aft