
Técnicas de estatística clássica bem como da geoestatística são ferramentas importantes para correlacionar, linear e espacialmente, a produtividade vegetal com os atributos do solo. Objetivou-se com este trabalho determinar as correlações, lineares e espaciais, entre a produtividade da cana de açúcar e os atributos químicos do solo. O trabalho foi realizado no município de Rubinéia (Estado de São Paulo, Brasil), num Argissolo Vermelho eutrófico, numa área de 1,30 ha, adoptando uma malha regular com 121 pontos amostrais para a recolha de dados do solo e da planta. Os atributos foram analisados tanto linear quanto espacialmente. O atributo da planta com maior correlação com a produtividade de colmos de cana-de-açúcar foi a população de plantas. Na camada superficial (0-0,20 m) o atributo do solo que mais influenciou a produtividade de colmos de cana-de-açúcar foi o potássio extraível, enquanto que na camada de 0,20-0,40 m foi o cálcio. O potássio extraível (0,20-0,40 m) foi ainda o atributo do solo que proporcionou o melhor ajustamento semivariográfico.
Classical statistic techniques and geostatistics are important tools to correlate linearly and spatially vegetal productivity to the soil´s properties. This study aimed to analyze the linear and spatial correlations between the productivity of sugarcane and soil chemical properties. The work was conducted in the city of Rubinéia (State of São Paulo, Brazil), in a Red Ultisol, in an area of 1.30 ha, adopting a regular grid with 121 sampling points for the collection of soil and plant data. The attributes were analyzed both linearly and spatially. The attribute of the plant with the highest correlation with the yield of sugarcane stalks was the plant population. In the surface layer (0-0.20 m), the soil attribute that influenced the yield of sugarcane stalks was extractable potassium, while in the layer of 0.20-0.40 m it was calcium. Extractable potassium (0.20-0.40 m) was also the soil attribute that provided the best semivariographic adjustment.
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