256-16 Correlation Between Grain Yield, Aluminum and Silicon Content In Upland Rice Plants Cultivated In Upland Soil Aluminate As Function As Si Application.



Tuesday, October 18, 2011
Henry Gonzalez Convention Center, Hall C, Street Level

Lucas Freitas, Dirceu Fernandes and Suelen Maia, FCA - UNESP, Botucatu, Brazil
The beneficial effect of silicon in plants is most evident in crops under stress conditions, because the Si is able to protect plants against various biotic and abiotic stresses, among them the Al3+ stress. The accumulation of Al3+ and Si in the shoot is exclusive, this is, and when Si is absorbed Al3+ is no longer. Given the above, the aim of this work was to evaluate the correlation between grain yield, aluminum and silicon content in the shoots of upland rice grown in soil with high concentrations of Al3+ and application of Si. The experiment was carried out in post of 40 L with soil naturally aluminate, presenting the initial amount of Al3+ to 11 mmolc dm-3. The experimental design was randomized blocks, in factorial design 2x5 with four replications. The treatments were two cultivars of upland rice: BRS Talento - not tolerant to toxic Al3+, modern, Guarani - tolerant to toxic Al3+, traditional, and added to soil five Si rates (0, 30, 60, 90, 120 mg dm-3). The results showed that Guarani cultivar exhibited no correlation between productivity and Si contents and Al3+ in the shoot of plants, however, there was a negative correlation between Si contents and Al3+. As for  BRS Talent, there was a correlation between yield and content of Si, already Al3+ content correlates with negatively yield in and there was a negative correlation between Si content and Al3+. These results indicate that there is interaction between Si and Al3+ for BRS Talent, making the Si applied to increase the Si content is decreased and the Al3+ content in shoot of plant, consequently increasing grain yield. Guarani cultivar there is interaction between Si and Al3+ contents, however, does not influence the yield.
See more from this Division: S04 Soil Fertility & Plant Nutrition
See more from this Session: General Soil Fertility and Plant Nutrition: II