Soil physical properties under a 'Tanzânia' grass pasture fertilized with mineral nitrogen or intercropped with stylosanthes

Abstract

-The objective of this work was to evaluate the physical properties of a soil with a 'Tanzânia' grass (Megathyrsus maximus) pasture fertilized with mineral nitrogen or intercropped with the legume 'Campo Grande' (Stylosanthes spp.), and subjected to continuous grazing and variable stocking rate, in a three-year chronosequence. The treatments were: 'Tanzânia' grass and Stylosanthes; and 'Tanzânia' grass fertilized with 75, 150, and 225 kg ha -1 N per year. The experiment was carried out in an Oxisol, in a randomized complete block design with three replicates, in split plots divided according to time (first, second, and third experimental years). The following soil properties were assessed annually: soil bulk density, porosity in the soil macropore domain, soil water and air storage capacity, and soil penetration resistance. After three years, the highest animal stocking rate due to increased forage yield did not affect the soil physical conditions. The intercrop of 'Tanzânia' grass with the legume shows values of soil water and air storage capacity close to the ideal ones (0.66 and 0.34, respectively). After the second experimental year, there is a decrease in the penetration resistance values, which are inferior to the critical limit of 2,500 kPa. The intercropping of 'Tanzânia' grass with stylosanthes 'Campo Grande' can be a remarkable alternative for the maintenance and improvement of soil physical conditions.

Recovery of degraded pasture using biosolids and Moringa oleifera: Review

“…A avaliação das propriedades físicas do solo contendo capim tanzânia (Megathyrsus maximus), adubado com nitrogênio mineral ou consorciado com a leguminosa estilosantes 'Campo Grande' (Stylosanthes spp.) mostrou que a pastagem associada a leguminosa é uma alternativa viável para mantença e melhoramento das condições físicas do solo (Ferreira et al, 2018). Muir et al (2019) fizeram uma avaliação dos conhecimentos relacionados ao uso de leguminosas em áreas de pastagens da Caatinga e concluíram que o uso de leguminosas aumenta os níveis de proteína bruta das pastagens, assim como o nitrogênio, favorecendo a recuperação de áreas degradadas.…”

Efeito Do Capim Vetiver E Dos Estilozantes Nos Parâmetros De Resistência Do Solo Ao Cisalhamento

“…Desta maneira não foi possível observar qualquer influência do estilosante nos parâmetros de resistência do solo durante o período de estudo avaliado. A influência do mesmo é discutida na literatura (ALENCAR et al, 2010;NEGREIROS NETO et al, 2010;FERREIRA et al, 2018), sendo recomendado um maior período de pesquisa para que o efeito do mesmo possa ser mais preciso.…”

Crop rotation and soil scarification: impacts in the soil penetration resistance

“…Thus, evaluations comparing the management techniques are necessary, so then it can be established which methods are more efficient to improve the soil physical properties. Among the techniques to evaluate the soil physical properties stand out the macroporosity, microporosity, total porosity, soil density and soil penetration resistance, being the last one considered a good indicative of soil quality; due to the fast evaluation and the data precision (Portugal et al 2010, Ferreira et al 2018.…”