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The effect of Al and Mn on growth and mineral composition of Casuarina equisetifolia Forst.

AuthorsKasraei, R.; Rodríguez Barrueco, Claudino ; Igual, José Mariano
Issue Date1996
PublisherKluwer Academic Publishers
CitationFertilizers and Environment. Developments in Plant and Soil Sciences. Volume 66. p: 75-81 (1996)
AbstractIn pot experiments (perlite) with Casuarina equisefifolia a strong growth depression and clear AI and Mn toxicity symptoms were found with higher treatment levels of AI and Mn. In nutrient solution dry matter yields at the highest AI treahnent (2000 pM) were 37,5% for shoot and 49,570 for root biomass compared to the control. With the highest Mn treatment (3200 PM) the yield was 49% of control for both shoot and root dry matter. The lowest levels of AI and Mn treatments (250 PM AI and 400 pM Mn) resulted in a dry weight production of 78,6% for shoots and 99,3% for roots in the case of AI and 80,7% for shoots and 89,8% for roots in the case of Mn compared with the dry weight produced by control plants. The AI accumulation was relatively higher in roots than in shoots and increased with increasing A1 concetrations in the nutrient solution. Also, Mn content in roots under low Mn treatments was as high as in shoots. High AI and Mn concentrations had a negative effect on the uptake of cations (Ca, Mg and Na). Aluminium had no effect on K uptake. A high decrease in the phosphorus concentrations in shoots and roots occurred in the higher treatments of Mn and especially Al. The uptake of NO,-N from the nutrient solution was positively influenced only by the lower AI and Mn treatments. Higher concentrations of AI and Mn had no effect on the N uptake. The principal toxicity symptoms shown by the plants were the blue-green colour with brown-necrotic spots on their shoots for AI and white-chlorotic spots in the upper parts of the shoots for Mn.
DescriptionIn: Rodriguez-Barrueco (ed.): Fertilizers and Environment. Developments in Plant and Soil Sciences Volume 66. Kluwer Academic Publishers (Netherlands). (Proceeding of the International Symposium. "Fertilizers and Environment" held in Salamanca, Spain, 26-29, September, 1994).
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