Variabilidade espacial dos atributos físicos do solo em área cultivada com palma forrageira resistente a cochonilha do carmim no semiárido nordestino
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2019
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The knowledge of the physical attributes of the soil is fundamental for the accomplishment of an appropriate management for the cultivation. This study was conducted with the objective of evaluating the spatial variability of the physical attributes of the soil in the area planted with forage palm in the transition region of the agreste with the backlands of Pernambuco. The experiment was conducted at the Roçadinho Farm, a milk producing property, whose main crop is the forage palm. In the cultivation area, a grid composed of 36 points was established, with a grid of 6 x 6 m. The physical properties of the soil were recorded with penetration resistance (Rp), moisture (U), soil density (Ds), particle density (Dp) and total porosity (Pt). The data were submitted to descriptive statistical analysis and the spatial variability through the semivariance у (h). The mean and median values presented symmetrical distribution for all variables. The mean Rp for the 0,0-0,10 m layer was classified as intermediate and for the 0,10-0,20 m layer as high. The Ds and Pt were inversely proportional, that is, an increase of Ds occurred at the points where the lowest percentage of Pt occurred. In the points that presented lower value of resistance to penetration and density of the soil, it was verified higher value of moisture and total porosity of the soil. The semivariograms models adjusted to the soil physical attributes were spherical and Gaussian. Through the geostatistics, it was possible to evaluate the spatial variability of soil physical attributes in forage palm cultivation.
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Geoestatística, Resistência à penetração, Semivariograma, Umidade, Geostatistics, Resistance the penetration, Semivariogram, Humidity
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SILVA, Marcos Vinícius da et al. Variabilidade espacial dos atributos físicos do solo em área cultivada com palma forrageira resistente a cochonilha do carmim no semiárido nordestino. Anuário do Instituto de Geociências - UFRJ, Rio de Janeiro, v. 42, n. 4, p. 39-45, 2019. DOI: 10.11137/2019_4_39_45. Disponível em: https://revistas.ufrj.br/index.php/aigeo/article/view/31316. Acesso em: 18 nov. 2024.