Capacidade de suporte de carga de Latossolo Vermelho cultivado com cana-de-açúcar e efeitos da mecanização no solo

Abstract

colheita mecanizada. As avaliações da CSC foram realizadas em amostras de solo indeformadas, coletadas na linha de plantio e no canteiro, em quatro camadas: 0,00-0,10, 0,10-0,20, 0,20-0,30 e 0,30-0,40 m. Determinou-se a área de contato dos rodados com o solo, para a estimativa da pressão exercida pelas máquinas agrícolas no solo. As pressões de preconsolidação foram usadas para determinar a CSC. O sistema com três ciclos apresentou maior CSC do que o sistema com apenas um ciclo. A capacidade de suporte de carga do solo avaliado na faixa de friabilidade é maior que as pressões de contato aplicadas ao solo pelos rodados das máquinas agrícolas estudadas.Termos para indexação: área de contato, compactação do solo, compressibilidade do solo, curva de compressão, pressão de contato, pressão de preconsolidação. Load support capacity of an Oxisol cultivated with sugarcane and mechanization effects on the soilAbstract -The objective of this work was to determine the load support capacity (LSC) of an Oxisol and, through compressibility models, relate it to wheel-soil interactions under management systems with one and three sugarcane crop cycles, with mechanized harvest. LSC evaluations were carried out on undisturbed soil samples, collected at planting row and bed, in four layers: 0.00-0.10, 0.10-0.20, 0.20-0.30, and 0.30-0.40 m. The contact area between wheels and soil was determined in order to estimate the contact pressure by agricultural machinery on the soil. Pre-consolidation pressures were used to determine LSC. The system with three cycles showed higher LSC than the system with only one cycle. The load support capacity of the soil evaluated in the range of friability is greater than the contact pressures applied to the soil by the wheels of the studied agricultural machines.

Abiotic Soil Health Indicators that Respond to Sustainable Management Practices in Sugarcane Cultivation

“…Straw also behaves as a dissipator of the compression energy caused by traffic, resulting in less structural alteration of the soil [43,44]. According to Vischi Filho et al [45], straw reduces the pressure of wheel-to-ground contact, due to the increased contact area, which favors the preservation of the structure and minimizes the soil compaction process. Therefore, the presence of straw in adequate quantities can mitigate the soil physical quality degradation caused by intense machine traffic in sugarcane fields [38,42,44].…”

Soil Load-Bearing Capacity and Development of Root System in Area Under Sugarcane with Traffic Control in Brazil

“…According to Lima et al (2015), the most important soil compressibility variable is precompression stress; its relationship with the soil water content enabled to achieve load-bearing capacity (LBC), which indicates the maximum pressure that a soil can withstand at a given water content with no increase in soil compaction (Taylor 1948;Dias Júnior and Pierce 1995;Souza et al 2012). A scenario in which contact pressure of wheelsets exceeds soil loadbearing capacity leads to a non-recoverable structural degradation (Silva et al 2009;Vischi Filho et al 2015); therefore, to define the load-bearing capacity of a given soil, management strategies should be defined to apply pressures below the preconsolidation pressure in order to avoid soil structural degradation (Souza et al 2012).…”