Temperature changes in soil covered by black oat straw

Authors

  • Anderson Luiz Zwirtes Instituto Federal Santa Catarina, Campus de São Miguel do Oeste, Rua 22 de Abril, no 2440, São Luiz, CEP 89900-000, São Miguel do Oeste, SC.
  • Dalvan José Reinert Universidade Federal de Santa Maria (UFSM), Centro de Ciências Rurais, Departamento de Solos, Avenida Roraima, no 1.000, Cidade Universitária, Camobi, CEP 97105‑900 Santa Maria, RS.
  • Paulo Ivonir Gubiani Universidade Federal de Santa Maria (UFSM), Centro de Ciências Rurais, Departamento de Solos, Avenida Roraima, no 1.000, Cidade Universitária, Camobi, CEP 97105‑900 Santa Maria, RS.
  • Vanderlei Rodrigues da Silva Universidade Federal de Santa Maria (UFSM), Departamento de Ciências Agronômicas e Ambientais, Campus Frederico Westphalen, Linha 7 de Setembro, BR 386, Km 40, CEP 98400-000 Frederico Westphalen, RS.
  • Rodrigo Pivoto Mulazzani Universidade Federal de Santa Maria (UFSM), Centro de Ciências Rurais, Departamento de Solos, Avenida Roraima, no 1.000, Cidade Universitária, Camobi, CEP 97105‑900 Santa Maria, RS.
  • André Somavilla Universidade Federal de Santa Maria (UFSM), Centro de Ciências Rurais, Departamento de Solos, Avenida Roraima, no 1.000, Cidade Universitária, Camobi, CEP 97105‑900 Santa Maria, RS.

DOI:

https://doi.org/10.1590/S1678-3921.pab2017.v52.25155

Keywords:

Avena strigosa, inversion temperature, mulch effect, no-tillage, plant residue, soil thermal regime

Abstract

The objective of this work was to evaluate the effect of different amounts of black oat (Avena strigosa) straw covering soil surface on soil temperature at different depths. The treatments consisted of 0, 3, 6, and 9 Mg ha-1 straw. Soil temperature was measured hourly by a thermocouple inserted at different depths (0, 5, 15, 30, and 50 cm) and was used to adjust an equation correlating the temperature of covered soil with that of bare soil. With the correlations, it was possible to observe a point value of temperature (inversion temperature of straw effect), below which the presence of straw acts positively on the maintenance of soil temperature and above which the presence of straw acts negatively on soil heating.

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Published

2017-12-18

How to Cite

Zwirtes, A. L., Reinert, D. J., Gubiani, P. I., Silva, V. R. da, Mulazzani, R. P., & Somavilla, A. (2017). Temperature changes in soil covered by black oat straw. Pesquisa Agropecuaria Brasileira, 52(11), 1127–1130. https://doi.org/10.1590/S1678-3921.pab2017.v52.25155

Issue

v.52, n.11, nov. 2017

Section

SCIENTIFIC NOTES