Variabilidade espacial de atributos químicos em um Argissolo sob pastagem

• Autor(a) principal: de Souza, Gustavo Soares
• Data de Publicação: 2008
• Outros Autores: de Souza Lima, Juliao Soares, Silva, Samuel de Assis, de Oliveira, Rone Batista
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4025/actasciagron.v30i4.5322; http://hdl.handle.net/11449/40680
• topic: spatial dependence; geostatistics; kriging

Studies show the importance of knowing the variability of soil attributes for a more efficient management. This work was carried out to evaluate the spatial variability of the chemical attributes of an Ultisol, cultivated with Brachiaria decumbens pasture in Alegre - ES. Soil samples were collected at a depth of 00-0.2 m, at the crossing points of a regular grid with 10 m-intervals, comprising a total of 64 points. Data were submitted to descriptive statistics, geostatistics and kriging interpolation analysis. The coefficient of variation was low for pH, high for Al and m%, and medium the other attributes. The attributes pH, P, H+Al and m% presented strong dependence, and the other moderate dependence. The attributes presented a spatial dependence structure, allowing their mapping by geostatistics techniques.