Abstract
In integrated crop-livestock systems under a no-tillage system, the action of animal trampling can influence the physical properties of the soil, depending on the intensity of grazing and stocking rate. This study aimed to evaluate the physical properties of a Humic Cambisol, under an integrated crop-livestock system submitted to different grazing intensities of lactating cows in the city of Lages, SC. The treatments constituted three forage masses of winter pasture (low, medium and high), and a control area, with no grazing (no grazing), oat and ryegrass consortium was used, then the density, hydraulic properties of the soil, organic matter content, aggregation and soil penetration resistance were evaluated. Generally the animal trampling had no significant influence on physical properties, the dynamics of water and the contents of soil organic matter. The macroporosity conditions, as well as high resistance to penetration, principally in conditions of low moisture, prove that the Humic Cambisol of the franc silty clay texture provides a constraint physical problem.
Highlights
In integrated crop-livestock systems under a no-tillage system, the action of animal trampling can influence the physical properties of the soil, depending on the intensity of grazing and stocking rate
This study aimed to evaluate the physical properties of a Humic Cambisol, under an integrated crop-livestock system submitted to different grazing intensities of lactating cows in the city of Lages, SC
The animal trampling had no significant influence on physical properties, the dynamics of water and the contents of soil organic matter
Summary
O experimento foi implantado na área experimental da UDESC-CAV no município de Lages - SC, onde o solo é classificado como Cambissolo Húmico (EMBRAPA 2013), com relevo suave ondulado a ondulado. O método de pastejo utilizado foi o rotativo, sendo que as parcelas foram pastejadas em três períodos até que fossem atingidas as massas de forragem de cada tratamento. Nos períodos entre pastejo os animais (vacas leiteiras) foram suplementados diariamente com 4 kg de Tabela 1 - Caracterização granulométrica e de densidade de partícula da área experimental. Duas vezes em cada ciclo de pastejo, durante o ciclo do consórcio de pastagens, foram avaliadas as intensidades de pastejo através do uso de um prato ascendente (Farmworks®, F200 model, New Zealand), e por coleta em cinco pontos em cada parcela do material vegetal em área de 1 m2, sendo estes secos em estufa a 60 °C por 72 h, para determinar o teor de matéria seca. Quando a Anova resultou em valor p significativo (p
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