Soil chemical attributes variability under tillage and no-tillage in a long-term experiment in southern Brazil

Authors

  • Katiaíres Evangelista Delpin Malvezi Universidade Estadual de Londrina
  • Luiz Antônio Zanão Júnior Instituto Agronômico do Paraná
  • Ednaldo Carvalho Guimarães Universidade Federal de Uberlândia
  • Sidney Rosa Vieira Instituto Agronômico de Campinas
  • Natália Pereira Universidade Estadual do Oeste do Paraná

DOI:

https://doi.org/10.14393/BJ-v35n2a20198-41793

Keywords:

Fertility, Geostatistics, Soil tillage

Abstract

Spatial variability of chemical attributes in soils tends to increase under the no-tillage system. However, data regarding this variability under this system for a long time are scarce. This study aimed to evaluate the spatial variability of phosphorus (P), organic matter (OM), pH, aluminum (Al), calcium (Ca), magnesium (Mg), potassium (K), base saturation (V%), sulfur (SO42-), and micronutrients: boron (B), iron (Fe), copper (Cu), manganese (Mn), and zinc (Zn) in soil with conventional tillage and no-tillage treatments for more than three decades in order to optimize fertilization and maintain soil conservation. Samples of Rhodic Hapludox were collected at 0.00–0.20 m depth. Sampling points were spaced 5 m apart, totaling 100 points. All sampling points were georeferenced according to the tillage system. Samples were analyzed chemically. Semivariograms and kriging were used in descriptive statistics and geostatistics analyses of the results. Only micronutrients and P presented distinct spatial variability between the treatments. Most of the analyzed chemical attributes presented spatial dependency in both tillage systems, which may help determine the best form of sampling and indicate adequate fertilization. According to semivariogram range values of OM, Mg, and K, the same sampling strategy may be adopted for analysis in both tillage systems, yet for Al, Ca, and pH the strategy should be specific.

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Published

2019-04-12

How to Cite

EVANGELISTA DELPIN MALVEZI, K., ZANÃO JÚNIOR, L.A., CARVALHO GUIMARÃES, E., ROSA VIEIRA, S. and PEREIRA, N., 2019. Soil chemical attributes variability under tillage and no-tillage in a long-term experiment in southern Brazil. Bioscience Journal [online], vol. 35, no. 2, pp. 467–476. [Accessed29 November 2022]. DOI 10.14393/BJ-v35n2a20198-41793. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/41793.

Issue

Section

Agricultural Sciences