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Análise espacial de parâmetros da fertilidade do solo em região de ecótono sob diferentes usos e manejos

2011; UNIVERSIDADE ESTADUAL DE LONDRINA; Volume: 32; Issue: 2 Linguagem: Inglês

10.5433/1679-0359.2011v32n2p541

1679-0359

Sabino Pereira da Silva Neto, Antônio Clementino dos Santos, Raimundo Laerton de Lima Leite, Valdinéia Patrícia Dim, Rossini da Cruz, Angélica Pedrico, Durval Dourado Neto,

Geography and Environmental Studies

In regions of ecotone soil chemical properties show a wide variation, resulting from the interplay between the factors of formation, vegetation cover and use. The aim of this study was to evaluate the spatial variability of chemical attributes of a Entisol transition zone between the Savannah and Amazonian biome in different forms of land use and management (forest, scrub, bare soil, crop, pasture and savanna) in the region of Araguaína city (TO). Samples were ground in an irregular mesh in an area of 26.08 ha, the depth of 0 to 20 cm to determine the levels of organic matter, P, K+, Ca2+, Mg2+ and pH, sum of bases, CECpH 7, CECe, V%, m%. The soil chemical properties were analyzed using descriptive statistics, comparison of average by Tukey test at 5% significance to the study and geostatistical kriging. The ranges of spatial dependence of the chemical organic matter, Al3+, K+, Mg+, and SB CECe soil were higher than the others (pH, P, Ca2+, CECpH 7, V%, m%), indicating that these are more discontinuity in the spatial distribution in Entisol three forms of agricultural use and vegetation cover three of the transition Savannah-Amazon. Thus, management strategies of correction and mineral fertilizers in an ecotone can be fitted according to the representations of studies and geostatistical kriging interpolation in homogeneous areas.