PROPRIEDADES FÍSICO-HÍDRICAS DE UM ARGISSOLO SOB PLANTIO DIRETO E INTEGRAÇÃO LAVOURA-PECUÁRIA NO CERRADO

Leovânio Rodrigues Barbosa; Henrique Antunes de Souza; Flávio Pereira de Oliveira; Luis Alfredo Pinheiro Leal Nunes; Luiz Fernando Carvalho Leite

doi:10.1590/1983-21252022v35n221rc

Authors

Leovânio Rodrigues Barbosa Department of Soils and Rural Engineering, Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0001-5978-3888
Henrique Antunes de Souza Empresa Brasileira de Pesquisa Agropecuária, Teresina, PI https://orcid.org/0000-0002-2209-4285
Flávio Pereira de Oliveira Department of Soils and Rural Engineering, Universidade Federal da Paraíba, Areia, PB https://orcid.org/0000-0001-7968-6145
Luis Alfredo Pinheiro Leal Nunes Department Agricultural Engineering and Soil, Universidade Federal do Piauí, Teresina, PI https://orcid.org/0000-0003-4218-9684
Luiz Fernando Carvalho Leite Empresa Brasileira de Pesquisa Agropecuária, Teresina, PI https://orcid.org/0000-0001-9648-705X

DOI:

https://doi.org/10.1590/1983-21252022v35n221rc

Keywords:

Water in the soil. Soil resistance. Integrated systems.

Abstract

Light soils are more susceptible to degradation and need to be exploited in a conservational manner, thus avoiding rapid degradation. The objective of this study was to evaluate the physical-hydraulic properties of an Ultisol under no-tillage and crop-livestock integration in the Cerrado of eastern Maranhão state, Brazil. The evaluated managements were one area under no-tillage system for fourteen years (soybean/millet) and three areas with different histories of adoption of the crop-livestock integration (CLI) system under no-tillage (soybean/millet), with the difference being: times of entry with CLI (2, 4 and 8 years), as well as a native Cerrado area, considered a control. Soil collection was carried out in June 2018 at depths of 0.00-0.10, 0.10-0.20, 0.20-0.30 and 0.30-0.50 m. Disturbed and undisturbed samples were collected to determine the following variables: bulk density, porosity, resistance to penetration, retention curve and available water capacity. Data were subjected to the calculation of means and confidence intervals (95%). The area with a recent history of crop-livestock integration showed better density, porosity, resistance to penetration, water storage capacity and available water. No-tillage for fourteen years leads to high resistance to penetration, less porosity and low water storage capacity. The integrated system (CLI) improves the quality of the physical-hydraulic properties and the values found are similar to those observed in an area under native vegetation.

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