386-9 Effect of Aluminum Doses and Sources On Upland Rice Plants.

Poster Number 1523

See more from this Division: SSSA Division: Nutrient Management & Soil & Plant Analysis
See more from this Session: Secondary and Micronutrients Poster Session

Wednesday, November 6, 2013
Tampa Convention Center, East Exhibit Hall

Dirceu Maximino Fernandes Sr., Ciencia do Solo, FCA - UNESP, Botucatu, Brazil, Lucas Barbosa de Freitas, Department of Soil and Environmental Resources, College of Agricultural Sciences, São Paulo State University – UNESP, Botucatu, Brazil and Suelen Cristina Mendonca Maia, Department of Crop Science, College of Agricultural Sciences, São Paulo State University – UNESP, Botucatu, Brazil
Abstract:
Not is well established the best source of aluminum (Al3+) to produce toxicity in nutrient solution experiments with upland rice, Furlani and Furlani in 1988 cited the aluminum sulfate - AlK(SO4)2.12H2O as the best source for use in nutrient solution, however, recent studies using the chloride aluminum (AlCl3.6H2O). So the aimed of this study was to evaluate the Al3+ concentration and source effects in the plant height, tillers number, dry weight of shoot, root and total of upland rice plants, in order to define the best Al3+ source  and concentration to produce toxicity for use in nutrient solution experiments. The experiment was conduct using experimental design in randomized blocks, in factorial design 2x5 with four replications. The treatments were two Al3+ source (aluminum sulfate and aluminum chloride) and added five Al3+ doses (0; 370; 740; 1.110 and 1.480 μmol L-1). With increasing of Al3+ concentration there was decrease in the height of shoots, number of tillers, root and total dry weight production in both sources of Al3+ used. This happened because the root in contact with Al3+ there is their growth inhibition. For the shoot dry weight production there was decreased just when applied aluminum chloride. In the comparison between the sources, the plants cultivated with aluminum chloride had lower dry matter and root production. Concludes that the source of aluminum chloride and the concentration 1.480 μmol L-1 are able to produce more Al3+ toxicity in upland rice plants.

See more from this Division: SSSA Division: Nutrient Management & Soil & Plant Analysis
See more from this Session: Secondary and Micronutrients Poster Session