Publications in year 2014

Vol. 28, Issue 4

Leaching kinetics of atrazine and inorganic chemicals in tilled and orchard soils

International Agrophysics
Year : 2014
DOI : 10.2478/intag-2014-0012
Volumen : 28
Issue : 2
Pages : 231 - 237
  PDF 130.29 KB
Authors: L. Szajdak1, J. Lipiec2, A. Siczek2, A. Nosalewicz2, U. Majewska2

1Institute for Agricultural and Forest Environment, Polish Academy of Sciences, Bukowska 19, 60-809 Poznań, Poland
2Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
Abstract :

The aim of this study was to verify first-order kinetic reaction rate model performance in predicting of leaching of atrazine and inorganic compounds (K+1, Fe+3, Mg+2, Mn+2, NH4 +, NO3- and PO4-3) from tilled and orchard silty loam soils. This model provided an excellent fit to the experimental concentration changes of the compounds vs. time data during leaching. Calculated values of the first-order reaction rate constants for the changes of all chemicals were from 3.8 to 19.0 times higher in orchard than in tilled soil. Higher first-order reaction constants for orchard than tilled soil correspond with both higher total porosity and contribution of biological pores in the former. The first order reaction constants for the leaching of chemical compounds enables prediction of the actual compound concentration and the interactions between compound and soil as affected by management system. The study demonstrates the effectiveness of simultaneous chemical and physical analyses as a tool for the understanding of leaching in variously managed soils.

Keywords : leaching, kinetics, atrazine, inorganic chemicals, tilled and orchard soils
Language : English