Least limiting water range in Oxisol under two conservation tillage systems in sugarcane farming

AUTOR(ES)

Souza, Cristiano Márcio Alves de; Suárez, Andrés Hideki Tanaka; Arcoverde, Sálvio Napoleão Soares; Armando, Egas Jose; Maciak, Paulo Alexandre Graciano

FONTE

Revista Ceres

DATA DE PUBLICAÇÃO

2022

RESUMO

ABSTRACT The Least Limiting Water Range (LLWR) is an indicator of soil physical quality, contributing in information to propose soil management systems in agricultural farming process. This work aimed to assess the usage of LLWR and critical soil bulk density for physical-water quality evaluations, as well as its effect on sugarcane farming under no-tillage and reduced-tillage, in Oxisol. Undisturbed soil samples were collected in 0.00-0.10 and 0.10-0.20 m soil layers, to determine the following attributes: soil bulk density, soil penetration resistance (PR), volumetric water content at field capacity and permanent wilting point and minimum aeration porosity. The LLWR proved to be a good soil physical water quality indicator in sugarcane farming under conservation tillage system. No-tillage presented a greater range of the LLWR when compared to the reduced-tillage, regardless to the PR value adopted as restrictive for sugarcane roots development, increasing the yield of stalks and sugars contents. The critical soil bulk density under no-tillage is between 1.48 and 1.53 Mg m-3 at the RP of 2 and 4 MPa, while under reduced-tillage it is between 1.44 and 1.51 Mg m-3.

Documentos Relacionados

• Least limiting water range in Spodosol and initial growth of sugarcane under soil bulk densities and salinities
• Least limiting water range, S-index and compressibility of a Udalf under different management systems
• Water retention and penetration resistance equations for the least limiting water range
• Least limiting water range for oil palm production in Amazon region, Brazil
• PEDOFUNCTIONS APPLIED TO THE LEAST LIMITING WATER RANGE TO ESTIMATE SOIL WATER CONTENT AT SPECIFIC POTENTIALS