Farm systems, soil chemical properties, and clay dispersion in watershed areas

Authors

  • Amanda Letícia Pit Nunes Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.
  • Glassys Louise de Souza Cortez Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.
  • Thadeu Rodrigues Melo Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.
  • Alex Figueiredo Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.
  • Cassio Alexandre Rolan Wandscheer Fundação Parque Tecnológico Itaipu, Avenida Tancredo Neves, no 6.731, Caixa Postal 2.039, CEP 85.867-900 Foz do Iguaçu, PR.
  • Jeankleber Bortoluzzi Federação Brasileira de Plantio Direto e Irrigação, Avenida Presidente Tancredo Neves, no 6.731, Parque Tecnológico de Itaipu, Edifício das Águas, 2° andar, sala 201, Caixa postal AC-PTI-2140, CEP 84010-350 Foz do Iguaçu, PR.
  • George Gardner Brown Embrapa Florestas, Estrada da Ribeira, Km 111, Parque Monte Castelo, CEP 83411-000 Colombo, PR.
  • Marie Luise Carolina Bartz Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, no 5.300, CEP 81280-330 Curitiba, PR.
  • Ricardo Ralisch Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.
  • Maria de Fátima Guimarães Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Agronomia, Campus Universitário, Caixa Postal 6.001, CEP 86051-990 Londrina, PR.

DOI:

https://doi.org/10.1590/S1678-3921.pab2020.v55.26735

Keywords:

conservation system, conventional system, no-tillage system, soil chemical properties, soil tillage

Abstract

The objective of this work was to evaluate the effect of different farm systems on clay dispersion and its relationship with soil chemical properties and the no-tillage system participatory quality index (IQP), in watershed areas in the west of the state of Paraná, Brazil. The farm systems evaluated were: no-tillage; no-tillage with crop succession; no-tillage with soil disturbance; and conventional system. In addition, the farm systems were evaluated for their IQP. Soil samples were collected at 0.0–0.20-m soil depth, in 40 agricultural areas and in 6 native forests considered as references. The degree of clay dispersion, total organic carbon, pH (CaCl2), exchangeable potassium (K+), available phosphorus (P), exchangeable calcium and magnesium (Ca2++Mg2+), and potential acidity (H+Al3+) were determined. A linear multiple regression model was fitted by the method of least squares. The averages of clay dispersion degree per watershed were compared at 5% probability. The farm systems were compared by Scott-Knott’s test. Soil chemical properties showed a higher influence on clay dispersion than the different farm systems assessed. The no-tillage system alone showed the highest content of organic carbon, which was similar to those of the native areas. The conventional system and the no-tillage system with soil disturbance showed a lower IQP and a higher degree of clay dispersion than the areas with the no-tillage system alone. The IQP allows distinguishing the conventional system from the no-tillage system.

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Published

2020-08-13

How to Cite

Nunes, A. L. P., Cortez, G. L. de S., Melo, T. R., Figueiredo, A., Wandscheer, C. A. R., Bortoluzzi, J., … Guimarães, M. de F. (2020). Farm systems, soil chemical properties, and clay dispersion in watershed areas. Pesquisa Agropecuaria Brasileira, 55(X), e01279. https://doi.org/10.1590/S1678-3921.pab2020.v55.26735

Issue

V.55, Jan./Dec., 2020 :Continuos publication

Section

SOIL SCIENCE