Abstract
This trial was carried out to study the effect of nitrate, phosphate and sulfate on growth and kinetics of P and S uptake by Eucalyptus grandis seedlings. The seedlings had their taproot pruned and were placed in sets of geminated plastic pots, with the root system split and growing in solutions containing the three nutrients, or with one of them isolated in one of the geminated pots. Seedling shoot dry weight when the solution in both pots contained the three nutrients was higher than that in the other treatments, which did not differ. Absence of NO3 − in the nutrient solution significantly reduced root dry weight. When both pots contained the three nutrients, the Km-SO4 2− was two to three times lower than that of the other four treatments. Influx of SO4 2− and H2PO4 − increased when NO3 − was supplied separately from SO4 2− or H2PO4 −.
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Barros, N.F., Ferreira, F.A.S., Novais, R.F., Neves, J.C.L., Alvarez V, V.H. (1993). Effects of nitrate, phosphate and sulfate combinations on growth and kinetics of phosphate and sulfate uptake by eucalypt seedlings. In: Fragoso, M.A.C., Van Beusichem, M.L., Houwers, A. (eds) Optimization of Plant Nutrition. Developments in Plant and Soil Sciences, vol 53. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2496-8_60
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DOI: https://doi.org/10.1007/978-94-017-2496-8_60
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