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Soil-applied Zn effect on soil fractions
Leite, Camila Marcon de Carvalho; Muraoka, Takashi; Colzato, Marina; Alleoni, Luís Reynaldo Ferracciú.
Afiliação
  • Leite, Camila Marcon de Carvalho; Universidade de São Paulo. Escola de Engenharia de São Carlos. Depto. de Engenharia Hidráulica e Saneamento. São Carlos. BR
  • Muraoka, Takashi; Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Divisão de Produtividade Agroindustrial e Alimentos. Lab. de Fertilidade do Solo. Piracicaba. BR
  • Colzato, Marina; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Depto. de Ciência do Solo. Piracicaba. BR
  • Alleoni, Luís Reynaldo Ferracciú; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Depto. de Ciência do Solo. Piracicaba. BR
Sci. agric ; 77(2): e20180124, 2020. tab, graf
Article em En | VETINDEX | ID: biblio-1497837
Biblioteca responsável: BR68.1
Localização: BR68.1
ABSTRACT
The interaction of Zn with soil compartments influences its bioavailability and uptake by plants. In this study, rice and soybean were cultivated under greenhouse conditions with the aim of evaluating Zn bioavailability and fractionation in a clayey-textured Typic Hapludox as a function of Zn rates (4 or 8 mg kg 1 Zn). The experiment was conducted until grain filling. Two soil subsamples (t 1 and t 2 ) that referred to the seeding and flowering stages, were collected and compared with two single extraction schemes, DTPA (Zn DTPAt1 and Zn DTPAt2 ) and Mehlich-1 (Zn Mt1 and Zn Mt2 ) for Zn available contents. Zn fractionation was carried out with t 2 soil subsamples for the testing of the following fractions exchangeable Zn (Zn Exc ), Zn bound to carbonates (Zn Carb ), Zn bound to organic matter (Zn OM ), Zn bound to oxides (Zn Oxi ) and residual Zn (Zn res ). Zn applied to soil increased the Zn concentration in labile fractions in decreasing order as follows Zn Exc > Zn OM > Zn Carb . There was no difference between the lesser or unavailable fractions, Zn Oxi and Zn res, when there was no correlation between the rates either with total accumulated Zn in plants (Zna total ), or the contents extracted by DTPA or Mehlich-1. Total cumulative Zn content in rice and soybean affected by the ZnCl 2 rates applied were positively correlated with Zn content extracted by both solutions. Both extractant solutions presented positive correlation between available contents of Zn with Zn bound to labile fractions.
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Texto completo: 1 Base de dados: VETINDEX Assunto principal: Oryza / Glycine max / Zinco / Análise do Solo / Química do Solo Idioma: En Revista: Sci. agric Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: VETINDEX Assunto principal: Oryza / Glycine max / Zinco / Análise do Solo / Química do Solo Idioma: En Revista: Sci. agric Ano de publicação: 2020 Tipo de documento: Article