Intervalo Hídrico Ótimo Em Solo Construído Após Mineração De Carvão Em Diferentes Limites Críticos De Resistência À Penetração E Umidade

Abstract

RESUMO Na quantificação do intervalo hídrico ótimo (IHO), são utilizados diferentes limites críticos de resistência à penetração (RP) e umidade na capacidade de campo (θ CC)

Critical values of physical attributes of an Ultisol under uses in South of Brazil

“…Aiming at establishing critical values of TS (TSc) from the PR for plant development, a correlation was established between these two parameters ( Figure 5A). Leão et al (2004) used 2500 kPa as a limit to the development of pastures, agreeing with Miola et al (2015) for soils under different management and, thus, suggesting TSc values of 88.67 kPa ( Figure 5A). The PR critical limits correspond to 3000 and 3500 kPa, as pointed out by Moraes et al (2014), might be established for the conditions of this study, as signals of degradation, TSc values over 98.67 and 108.67 kPa ( Figure 5A), respectively.…”

Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining

“…In general, these species have vigorous root systems, drought tolerance, wide adaptation to different conditions of climate and soil fertility, and above all, tend to produce high dry matter yields, with a better development than other cover crop species (Soares Filho et al, 2002;Cano et al, 2004;Santos and Costa, 2006;Barducci et al, 2009). The higher suitability of these species compared to other grasses to recover the quality of the constructed soil in Candiota, particularly concerning the chemical and physical soil properties, was recently reported in the literature (Lima et al, 2012;Reis et al, 2014;Stumpf et al, 2014a,b;Miola et al, 2015).…”

“…Due to the movement of the surface horizons during soil withdrawal (pre-extraction of coal), storage and subsequent deposition as surface layer of the constructed soil, these soils usually have high degradation and compaction levels, low fertility and a particularly poor quality of organic matter (OM), hampering the recovery of soil quality (Corrêa, 2009;Stumpf et al, 2014a;Leal et al, 2015a;Miola et al, 2015).…”

Potencial Agronômico De Fertilizantes Nitrogenados De Liberação Controlada Na Cultura Do Milho

“…Os resultados referentes à análise estatística descritiva revelam que todas as propriedades avaliadas apresentam distribuição normal, conforme o teste de Kolmogorov-Smirnov, ao nível de 5% de erro (TABELA 1). Dentre os resultados apresentados em todos os sistemas estudados (TABELA 1), a RP demonstrou valores médios inferiores aos considerados restritivos, de acordo com Miola et al (2015), Klein e Câmara (2007).…”