Resumo

RODAS-GAITAN, Heberto A. et al. Macronutrients absorption curves in italian squash (Cucurbita pepo L.). Rev. fitotec. mex [online]. 2012, vol.35, n.spe5, pp.57-60. ISSN 0187-7380.

Chemical analyzes were conducted to determine plant growth and absorption curves for some essential nutrients during the Italian squash (Cucurbita pepo L.) growing season in a commercial production plot. The total dry biomass production was 243 g/plant; time series absorption data for nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) were adjusted to linear models; the regression coefficients (R²) were: 0.89, 0.92, 0.94, 0.78 and 0.72 for N, P, K, Ca, and Mg, respectively. According to plant population (26 600 plants ha^-1), the total absorption ( g/plant) for each mineral was: 6.75 N, 0.67 P, 1.37 K, 7.47 Ca, and 2.07 Mg.

Palavras-chave : Cucurbita pepo; phenological stage; linear regression.

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