variabilidade espacial da infiltração de água em solo sob pastagem em função da intensidade de pisoteio spatial variability of water infiltration rate in soil under pasture as a function of cattle trampling intensity
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2009
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Abstract
O objetivo deste trabalho foi avaliar o efeito da intensidade de pisoteio do gado na variabilidade espacial da infiltração de água no solo. O experimento foi conduzido em um Argissolo Vermelho-Amarelo, com pastagem de Urochloa brizantha dividida em seis piquetes de 1 ha, cada um com 50 pontos de amostragem, em grade de 10x10 m. Em cada local de amostragem, foi medida a taxa de infiltração tridimensional de água em solo saturado, nas profundidades de 0,10 e 0,20 m. As medições foram realizadas na primeira, décima primeira e décima quinta passagens do gado pelos piquetes. Os dados obtidos foram submetidos à análise geoestatística, para avaliação da variabilidade espacial das propriedades do solo. As 15 passagens do gado pelos piquetes resultaram em diminuição da taxa de infiltração de água no solo de 73,3% a 0,10 m e de 64,6% a 0,20 m de profundidade. O estudo da variabilidade espacial da taxa de infiltração de água no solo, por meio da geoestatística, possibilita a construção de mapas para a avaliação dos efeitos da intensificação do pisoteio do gado sobre as propriedades físicas do solo. A taxa de infiltração de água no solo apresenta estrutura de dependência espacial que aumenta em função da intensidade do pisoteio do gado.
The objective of this work was to evaluate the effect of cattle trampling intensity on the spatial variability of soil-water infiltration rate. The experiment was carried out on an Argissolo Vermelho-Amarelo (Ultisol) under a Urochloa brizantha pasture, divided into six one-hectare plots, each with 50 sampling points in a 10x10 m grid. In each sampling site, the saturated three-dimensional infiltration rate at 0.10 and 0.20-m depths was measured. Measurements were made in the first, eleventh and fifteenth cattle passages on the plots. Data were submitted to geostatistics for the study of the spatial variability of the saturated infiltration rate. The 15 cattle passages on the plots caused a decrease of 73.3% in the soil water infiltration rate, at 0.10-m depth, and 64.4% at 0.20-m depth. The study of spatial variability of soil-water infiltration rate with geostatistics permits the construction of maps for assessing the effects of cattle trampling intensification on soil physical properties. Water infiltration rate in soil has a spatial dependency structure which increases as a function of trampling intensity.
The objective of this work was to evaluate the effect of cattle trampling intensity on the spatial variability of soil-water infiltration rate. The experiment was carried out on an Argissolo Vermelho-Amarelo (Ultisol) under a Urochloa brizantha pasture, divided into six one-hectare plots, each with 50 sampling points in a 10x10 m grid. In each sampling site, the saturated three-dimensional infiltration rate at 0.10 and 0.20-m depths was measured. Measurements were made in the first, eleventh and fifteenth cattle passages on the plots. Data were submitted to geostatistics for the study of the spatial variability of the saturated infiltration rate. The 15 cattle passages on the plots caused a decrease of 73.3% in the soil water infiltration rate, at 0.10-m depth, and 64.4% at 0.20-m depth. The study of spatial variability of soil-water infiltration rate with geostatistics permits the construction of maps for assessing the effects of cattle trampling intensification on soil physical properties. Water infiltration rate in soil has a spatial dependency structure which increases as a function of trampling intensity.
| Reference Key |
miguel2009pesquisavariabilidade
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| Authors | ;Fernanda Ribeiro Marques Miguel;Sidney Rosa Vieira;Célia Regina Grego |
| Journal | proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006 |
| Year | 2009 |
| DOI |
10.1590/S0100-204X2009001100020
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