Forms and accumulation of copper and zinc in a sandy typic hapludalf soil after long-term application of pig slurry and deep litter

Revista Brasileira de Ciência do Solo

Tadeu Luis Tiecher²  Carlos Alberto Ceretta¹  Jucinei José Comin¹  Eduardo Girotto¹  Alcione Miotto¹  Marcel Pires De Moraes¹  Lucas Benedet¹  Paulo Ademar Avelar Ferreira¹  Cledimar Rogério Lorenzi¹  Rafael Da Rosa Couto¹  Gustavo Brunetto¹ 

[1] ,Universidade Federal de Santa Maria Program in Soil Science Santa Maria RS ,Brazil

关键词: manure;    trace elements;    chemical fractionation;    environmental contamination;    esterco;    elementos-traço;    fracionamento químico;    contaminação ambiental;   

DOI  :  10.1590/S0100-06832013000300028

来源: SciELO

【 摘 要 】

Successive applications of pig slurry and pig deep litter may lead to an accumulation of copper (Cu) and zinc (Zn) fractions in the soil profile. The objective of this study was to evaluate the Cu and Zn forms and accumulation in a Sandy Typic Hapludalf soil after long-term application of pig slurry and deep litter. In March 2010, eight years after initiating an experiment in Braço do Norte, Santa Catarina (SC), Brazil, on a Sandy Typic Hapludalf soil, soil samples were collected from the 0-2.5, 2.5-5.0, 5-10 and 10-15 cm layers in treatments consisting of no manure application (control) and with applications of pig slurry and deep litter at two levels: the single and double rate of N requirement for maize and black oat succession. The soil was dried, ground in an agate mortar and analyzed for Cu and Zn contents by 0.01 mol L-1 EDTA and chemically fractionated to determine Cu and Zn. The applications of Pig deep litter and slurry at doses equivalent to 90 kg ha-1 N increased the contents of available Cu and Zn in the surface soil layer, if the double of this dose was applied in pig deep litter or double this dose in pig slurry, Cu and Zn migrated to a depth of 15 cm. Copper is accumulated mainly in the organic and residual fractions, and zinc preferentially in the fraction linked to clay minerals, especially in the surface soil layers.

【 授权许可】

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