Spatial variability of soil physical attributes in integrated production systems in the Amazon region

Authors

  • Izabela de Lima Feitosa Universidade Federal de Rondônia, Avenida Norte/Sul, no 7.300, Nova Morada, CEP 76940-000 Rolim de Moura, RO.
  • Alexandre Martins Abdão dos Passos Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Henrique Nery Cipriani Embrapa Rondônia, Rodovia BR-364, Km 5,5, Zona Rural, Caixa Postal 127, CEP 76815-800 Porto Velho, RO.
  • Marcelo Silva de Oliveira Universidade Federal de Lavras, Campus Universitário, Caixa Postal 3037, CEP 37200‑000 Lavras, MG.
  • Alaerto Luiz Marcolan Embrapa Rondônia, Rodovia BR-364, Km 5,5, Zona Rural, Caixa Postal 127, CEP 76815-800 Porto Velho, RO.
  • Gustavo Mattos Vasques Embrapa Solos, Rua Jardim Botânico, no 1.024, Jardim Botânico, CEP 22460-000 Rio de Janeiro, RJ.

DOI:

https://doi.org/10.1590/S1678-3921.pab2019.v54.26620

Keywords:

Eucalyptus, Urochloa brizantha, agronomic efficiency, precision agriculture, soil compaction, soil variability

Abstract

The objective of this work was to analyze the spatial variability of soil physical attributes in integrated production systems and its relationship with the growth and yield of a corn (Zea mays) crop intercropped with palisade grass (Urochloa brizantha). The experiment was carried out in an integrated crop-livestock (ICL) system and in an integrated crop-livestock-forestry (ICLF) system, in a Typic Hapludox. The ICLF system was managed in alleys between eucalyptus (Eucalyptus spp.) rows, spaced at 18, 30, and 42 m. Corn grain and forage yields were positively correlated with soil clay and moisture contents, whereas grain yield was negatively correlated with soil penetration resistance. The lowest corn plant heights and grain yields were observed near eucalyptus rows. The average values for soil penetration resistance were below 2.0 MPa. Spatial variability was verified for: corn plant height, grain yield, and agronomic efficiency; forage intercropping; and soil moisture and silt contents, as well as penetration resistance. Greater grain and biomass yields were obtained at a 42-m distance between tree rows. The obtained results are indicative that corn traits and soil physical attributes were only slightly associated. The spatial distribution of the eucalyptus rows influences the agronomic efficiency of the intercrop and soil moisture contents.

Downloads

Published

2019-11-20

How to Cite

Feitosa, I. de L., Passos, A. M. A. dos, Cipriani, H. N., Oliveira, M. S. de, Marcolan, A. L., & Vasques, G. M. (2019). Spatial variability of soil physical attributes in integrated production systems in the Amazon region. Pesquisa Agropecuaria Brasileira, 54(X), e00324. https://doi.org/10.1590/S1678-3921.pab2019.v54.26620

Issue

Section

PRECISION AGRICULTURE