02362naa a2200253 a 450000100080000000500110000800800410001902400380006010000160009824501860011426000090030052015420030965000270185165000150187865000110189365000090190465000240191365000180193765000180195565000120197370000150198570000190200077300890201918985622024-11-04       2011    bl uuuu     u00u1 u    #d7 a10.1080/00103624.2011.6024472DOI1 aMOREIRA, A.  aEffects of boron application on yield, foliar boron concentration, and efficiency of soil boron extracting solutions in a Xanthic Ferralsol cultivated with banana in Central Amazon.  c2011  aThe boron (B) is known to play an important role for the structure of cell wall, membranes and the integrity and functions of membranes in plants. Under the conditions of the Central Amazon region, there are few studies about this nutrient. In Brazilian soils, the hot water B extraction method has been extensively used for evaluation of soil B status. However, difficulties with this method result in low accuracy and precision of extraction of available B in soil. The objective of this study was to evaluate the yield, foliar concentration, and efficiency of B extracting solutions and the effect of B fertilization on B uptake in banana (Musa spp.) leaves and fruits, subgroup Cavendish (AAA), cultivated in a Xanthic Ferralsol (dystrophic Yellow Latosol) located in Amazonas State, Brazil. The experimental design was a completely randomized split plot, comprising four B rates (0, 4, 8, and 12 kg ha-1), and two harvest cycles (sub-treatments), with four replicates. Available B was determined with seven extractant solutions: Mehlich 1, Mehlich 3, hot water, hydrochloric acid (HCl) 0.05 mol L-1, HCl 0.1 mol L-1, HCl 5.0 mol L-1, and potassium chloride (KCl 1.0 mol L-1). The application of B fertilizer increased the yield and B concentration in leaves and fruits. Hot water and KCl 1.0 mol L-1 were the most efficient extracting solutions for the determination of available B in soil. The application of 3.4 kg B ha-1 in first cycle and 1.3 kg B ha-1 in second cycle guarantees an adequate nutritional status in banana plants.  aFertilizer application  aAdubação  aBanana  aBoro  aFertilidade do solo  aMacroelemento  aMicroelemento  aMusa sp1 aCASTRO, C.1 aFAGERIA, N. K.  tCommunications in Soil Science and Plant Analysisgv. 42, n. 18, p. 2169-2178, 2011.