Atributos Físico-hídricos de um Cambissolo Húmico Sob Sistema Agroflorestal no Planalto Catarinense

Abstract

RESUMOObjetivou-se com este trabalho avaliar e comparar a viabilidade de um sistema agroflorestal a partir dos atributos físicos e hídricos do solo ao longo do tempo, conduzido na cidade de Curitibanos-SC com tratamentos: SAF-Erva Mate (SE), SAF-Frutífera (SF), SAF-Agrícola (SA), e uma área de Vegetação Nativa (VN) como testemunha. Foram abertas trincheiras aleatórias em cada tratamento para coleta das amostras de solo com estrutura preservada e alterada nas profundidades 0,0-0,05 m e 0,05-0,20 m no primeiro semestre de 2014 e 2015. As profundidades foram selecionadas de acordo com análises visuais da estrutura do solo. Foram determinados os atributos físicos e hídricos do solo e o balanço hídrico. A densidade do solo e a microporosidade proporcionaram um aumento significativo de seus atributos no decorrer do tempo. O sistema manteve-se dentro da capacidade de água disponível com balanço hídrico adequado ao desenvolvimento das culturas, o que o torna viável e sustentável.Palavras-chave: qualidade estrutural, água no solo, balanço hídrico. Physical-hydric Attributes of a Humic Inceptisol in Agroforestry on the Santa Catarina Plateau ABSTRACTThe present study has the objective to evaluate and compare the feasibility of agroforestry systems by physical and hydric soil attributes over time, conducted in the city of Curitibanos-SC. The treatments are as follows: SIF-mate herb (SE), SIF-fruit (SF), SIF-agricultural (SA) and Native Vegetation (NV) as a control area. Random trenches were dug in each treatment to collect soil samples with preserved and altered structure at 0.0-0.05m and 0.05-0.20m depths in the first half of 2014 and 2015, to determine physical and hydric soil attributes and the water balance. The depths were selected based on visual analysis of soil structure. Soil bulk density and microporosity provided a significant increase in its attributes over the course of time. The system remained within the available water capacity with proper water balance for the cultures, making it viable and sustainable.

Water Availability in a Planosol Under Integrated Crop-Livestock-Forestry System in the Agreste Region of Paraiba, Brazil

“…GS+BD = Gliricidia sepium + Brachiaria decumbens; MC+BD = Mimosa caesalpiniifolia + Brachiaria decumbens; TA+BD = Tabebuia alba + Brachiaria decumbens; ZM+BD = Zea mays + Brachiaria decumbens; BD = Brachiaria decumbens; Means followed by the same letters in the columns do not differ by the Tukey's test (p<0.05). Barbosa et al (2017) evaluated soil physical attributes in an agroforestry system in Santa Catarina, Brazil, and found that the amount of compact aggregates and the increase in microporosity volume had a positive effect on soil water storage capacity, corroborating with the data found by the present study. Moreover, Suzuki et al (2008) evaluated the soil susceptibility to compaction in Rio Grande do Sul, Brazil, and found a reduction in volumetric moisture with increasing clay content and decreasing soil density.…”

Physical Attributes of Soil in Different Forest Cover in South of Tocantins

“…The results found in this study can be justified due to their similar particle size that both had a direct influence on the density, since the studied area does not present traffic of vehicles or animals that justify the high density values found. However, the density data presented may indicate the occurrence of soil degradation, which indicates probable soil compaction and / or densification [5]. The higher DS value for the soil under Eucalyptus planting compared to the cerrado sensu stricto shows that the soil of the area is still in regeneration process, due to the land preparation, fertilization and planting process.…”

“…In addition, mulching also promotes a better quality of soil physical characteristics, with the contribution of organic matter, which helps in reducing soil compaction, increases porosity and provides greater aggregate stability [4]. Raindrops when they fall directly into the soil cause greater impact and consequently greater soil compaction, causing pore shrinkage, which reduces aeration, water percolation and hindering plant root development [5].…”

Análise Econômica Da Agricultura Biodinâmica

“…al., 2011). O solo da região é classificado como Cambissolo Húmico Alumínico com características argilosas (BARBOSA, et. al.…”

“…O solo onde foi implantado o experimento, devido a sua estruturação físico-química e por seu histórico de uso, pode ser considerado como de baixa qualidade nutricional (BARBOSA, et. al.;.…”