ISSN:
1573-5036
Schlagwort(e):
Aluminum toxicity
;
Chemical composition
;
Oryza sativa L.
;
Upland rice
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
Summary Aluminum toxicity is an important growth limiting factor for upland rice production on oxisols of ‘cerrado’ region in Brazil. Data related to the effect of Al on uptake of nutrients for rice crop are limited. The effect of five Al concentrations (0, 10, 20, 40 and 60 ppm) in culture solution on the chemical composition of 30 upland rice cultivars was studied. Aluminum concentration and content in plant tissues were increased with higher levels of Al in all cultivar. In the roots Al content was higher as compared with the tops. Critical toxic level of Al in the tops of 21 days old plants varied from 100 to 417 ppm depending on the cultivars. Rice cultivars responded differently to Al treatments with respect to nutrients uptake. Increased Al concentrations in the solution exerted an inhibiting effect on the concentrations and contents of N, P, K, Ca, Mg, S, Na, Zn, Fe, Mn, B and Cu. Thus the inhibition was more effective for macronutrients in the plant tops in following order: Mg〉Ca〉P〉K〉N〉S〉Na. Whereas for micronutrients it was in the order of Mn〉Zn〉Fe〉Cu〉B. Morphological, physiological and biochemical effects of Al, toxicity responsible for the reduction in plant nutrient uptake, are discussed.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02185701
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