Variabilidade espacial e temporal das características químicas do solo correlacionadas com a produção de laranja no Estado do Pará.

Abstract

Aiming to evaluate the spatial and temporal variability of macronutrient concentration in soil, correlating with the size and productivity of oranges in the state of Pará, an experiment was conducted at the farm Citropar, using the technique of geostatistics. The experimental area was a block of 16 DQ12 hа with 4600 plants, during the years 2007 to 2009 were collected samples of fruit size, yield and soil. The results obtained during the three years analyzed showed that the yield maps and fruit size showed high spatial variability, there was no influence productivity by fruit size but by the number of fruits per plant, there was no influence of pH, MO , P, K, Ca, Mg on yield and fruit size, yield maps, fruit diameter, pH and organic matter (OM) and soil nutrients (P, K, Ca and Mg), generated through the georeferencing comGPS atrvés geostatistics and analyzed, showed the differences between the regions represented by the various sampling points raised, allowing the identification of sub-areas where the management practices of field can be oriented in accordance with the degree of variability of this factor.