Si im mp pó ós si io o d de e G Ge eo oe es st ta at tí ís st ti ic ca a A Ap pl li ic ca ad da a e em m C Ci iê ên nc ci ia as s A Ag gr rá ár ri ia as s1 14 4 e e 1 15 5 d de e M Ma ai io o d de e 2 20 01 15Resumo -Os sistemas agroflorestais podem viabilizar o cultivo do café através dos princípios do manejo sustentado dos ecossistemas. Objetivou-se no presente trabalho descrever a variabilidade espacial dos atributos do solo relacionados a acidez (Al, H+Al, MO e pH do solo), em uma lavoura consorciada de café conilon (Coffea canephora) -seringueira (Hevea brasiliensis). Conduziu-se o experimento em uma lavoura de café conilon consorciada com seringueira, no município de Nova Venécia, norte do estado do Espírito Santo, demarcou-se, uma malha quadrangular de 24 x 63 m (1.512 m 2 ) com 60 pontos, foram coletadas quatro subamostras de solo na projeção da copa do cafeeiro em cada um dos pontos cardeais, formando uma amostra composta, na profundidade de 0-0,20m, para obtenção de dados referentes à fertilidade do solo (alumínio, acidez potencial, matéria orgânica e pH do solo). Os dados foram submetidos à análise geoestatística. Verifica-se estrutura de dependência espacial para todos os atributos estudados, com índice de dependência espacial forte e moderado. O conhecimento da variabilidade espacial dos atributos químicos do solo pode ser usado para o desenvolvimento de estratégias de manejo de aplicação de insumos agrícolas.Palavras-chave: geoestatística; atributos químicos; distribuição espacial. SPATIAL VARIABILITY OF SOIL ATTRIBUTES RELATED TO THE ACIDITY IN A YELLOW ARGISOILAbstract -The agroforestry systems can enable the cultivation of coffee through the principles of sustainable management of ecosystems. The objective of this study was to describe the spatial variability of soil attributes related to acidity (Al, H + Al, MO and soil pH) in a coffee conilon (Coffea canephora) crop intercropped with rubber (Hevea brasiliensis). The experiment was conducted in a coffee conilon crop intercropped with rubber tree, in Nova Venécia, northern state of Espírito Santo, Brazil. The experimental area has dimensions of 24 x 63m (1.512m2), where we marked a grid of 60 sampling points. At each sample point were collected four replicates of soil in the projection of the coffee canopy, forming a sample at a depth of 0-0.20 m, to obtain data on soil fertility (aluminum, potential acidity, organic matter and soil pH). The data were submitted to geostatistical analysis. All attributes in study showed spatial dependence structure, with index spatial dependence strong and moderate. Knowledge of the spatial variability of soil chemical properties can be used to develop application management strategies agricultural input.
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