Data/hora: 21/06/2024 12:03:16

Biblioteca(s): | Embrapa Solos.
Data corrente: | 22/11/2002
Data da última atualização: | 22/11/2002
Autoria: | MACHADO, P. L. O. de A.
Afiliação: | EMBRAPA-CNPS, Rio de Janeiro, RJ.
Título: | Einfluss von humus und basischen kationen auf die aluminium-toxizitat bei ausgewahlten landwirtschaftlichen kulturpflanzen. [Influence of the soil organic matter and basic cations on the aluminium-toxicity to some selected crop plants].
Ano de publicação: | 1993
Fonte/Imprenta: | Wien : Universitat fur Bodenkultur Wien, 1993.
Páginas: | 100p.
Idioma: | Alemão
Notas: | Tese Doutorado.  Contem resumo e titulo em ingles: Influence of the soil organic matter and basic cations on the aluminium-toxicity to some selected crop plants.
Conteúdo: | Soil acidity is a process which leads to leaching of important        plant mineral nutrients from de root zone. Paralell to nutrient       deficiency there is an increase of Al- concentration in the soil      solution restricting crop growth. In spite of the fact that liming    acid soils is often not feasible, it is still considered to be an     efficient measure. hence, aluminium- tolerant plants seem to be a     propitius solution to soil Al- toxicity. Improvement of the soil      humus status could be a further alternative for long-term             neutralization of Al- toxicity. This is of utmost importance          considering the fact that the quality and quantity of the soil        organic matter can locally be improved through crop rotation and  green manuring. In order to identify basic influences of organic      matter on Al- toxicity to maize a sand culture experiment was         conducted with four Al- treatments (0, 25, 50 and 75 mg Al/L)         combined with four levels of peat mixed to the sand                   (0.0, 0.5, 1.5, and 3.0% peat). Increasing Al- concentrations in      the nutrient solution in most cases resulted in a significant         growth reduction of shoots and roots. Peat treatments clearly         diminished these Al- toxicity effects. Al- concentrations in          shoots were hardly influenced by various treatments. Al- contents     in maize roots were augmented more than tenfolds with increasing      Al- concentration of the nutrient solution in peat free treatments.
Categoria do assunto: | --
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (3631-1) - ADD - TS - -- - 93014 - MAC/93 - 1996.00197 - DIS