naa a22 4500 510752020 CHVBK 20180411083108.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11270-013-1557-6 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1557-6 Testing Extractants for Cu, Fe, Mn, and Zn in Tropical Soils Treated with Sewage Sludge for 13 Consecutive Years [Elektronische Daten] [Roberta Nogueirol, Wanderley de Melo, Luís Alleoni] In this paper, we report on a field experiment being carried out in a Typic Eutrorthox. The experiment was initiated in the 1997-98 agricultural season as a randomized block design with four treatments (0, 5, 10, and 20tha−1) of sewage sludge and five replicates. Compound soil samples were obtained from 20 subsamples collected at depths of 0-0.1 and 0.1-0.2m. Cu, Fe, Mn, and Zn concentrations were extracted with DTPA pH7.3; 0.1molL−1 HCl, Mehlich-I, Mehlich-III, and 0.01molL−1 CaCl2. Metal concentrations were determined via atomic absorption spectrometry. Diagnostic leaves and the whole above-ground portion of plants were collected to determine Cu, Fe, Mn, and Zn concentrations extracted by nitric-perchloric digestion and later determined via atomic absorption spectrometry. Sewage sludge application caused increases in the concentrations of soil Cu, Fe, and Mn in samples taken from the 0-0.1m depth evaluated by the extractants Mehlich-I, Mehlich-III, 0.01molL−1 HCl and DTPA pH7.3. None of the extractants provided efficient estimates of changes in Mn concentrations. The acid extractants extracted more Cu, Fe, Mn, and Zn than the saline and chelating solutions. The highest concentrations of Cu, Fe, and Zn were obtained with Mehlich-III, while the highest concentrations of Mn were obtained with HCl. We did not observe a correlation between the extractants and the concentrations of elements in the diagnostic leaves nor in the tissues of the whole maize plant (Zea mays L.). Springer Science+Business Media Dordrecht, 2013 Micronutrients nationallicence Organic matter nationallicence Plant nutrition nationallicence Trace elements nationallicence Nogueirol Roberta Soil Science and Plant Nutrition, University of São Paulo (ESALQ/USP), P.O. Box 9, 13418-900, Piracicaba, SP, Brazil aut de Melo Wanderley Department of Technology, São Paulo State University, 14884-900, Jaboticabal, SP, Brazil aut Alleoni Luís Department of Soil Science, University of São Paulo (ESALQ/USP), P.O. Box 9, 13418-900, Piracicaba, SP, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/5(2013-05-01), 1-13 0049-6979 224:5<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1557-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1557-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nogueirol Roberta Soil Science and Plant Nutrition, University of São Paulo (ESALQ/USP), P.O. Box 9, 13418-900, Piracicaba, SP, Brazil aut NATIONALLICENCE 700 1- de Melo Wanderley Department of Technology, São Paulo State University, 14884-900, Jaboticabal, SP, Brazil aut NATIONALLICENCE 700 1- Alleoni Luís Department of Soil Science, University of São Paulo (ESALQ/USP), P.O. Box 9, 13418-900, Piracicaba, SP, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/5(2013-05-01), 1-13 0049-6979 224:5<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer