The objective of this work was to evaluate the effects of gross irrigation depths on the nutrient concentration of Eucalyptus grandis seedlings, produced in different substrates. The experiment was carried out in Camará - Mudas Florestais, in Ibaté, São Paulo, in a factorial 5 x 4, with five daily irrigation levels (6, 8, 10, 12 and 14 mm), applied three times a day (at 10 am, 13 pm and 16 pm), on four substrates (FB- coconut fiber; CPV- pine bark and vermiculite; CATV- pine bark, coal, turf and vermiculite and MIX- 70 % CPV and 30 % FB). The nutrient concentration was determined in the aerial part and roots of the seedlings, which was influenced by irrigation levels and substratum type. The nutrient concentrations rose with the increase of the irrigation levels. The nutrient accumulation was highest using FB and CPV substrates. CPV was best for macronutrient accumulation and together with FB, best for micronutrient accumulation in roots and aerial parts. Macronutrient accumulation in the aerial part was influenced by the irrigation levels but not by the substratum.
Eucalyptus grandis; tree nursery; irrigation; mineral nutrition
