Abstract

SOUSA, Humberto Umbelino de; RAMOS, José Darlan; CARVALHO, Janice Guedes de  and  FERREIRA, Ester Alice. Nutrition of açai seedlings (Euterpe oleracea Mart.) under different ratios of calcium:potassium: sodium in nutrient solution. Ciênc. agrotec. [online]. 2004, vol.28, n.1, pp. 56-62. ISSN 1413-7054.  http://dx.doi.org/10.1590/S1413-70542004000100007.

Aiming to evaluate the effects of different ratios of calcium, potassium and sodium cations on the mineral nutrition of açai seedlings (Euterpe oleracea Mart.), a greenhouse experiment was carried out in the Soil Science Department at the Federal University of Lavras-UFLA. The randomized block design, with nine treatments and four replications, was used. The treatments were nine ratios of calcium, potassium and sodium (4:2:1, 3:3:1, 2:4:1, 1:5:1, 5:1:1, 4:1:2, 6:0:1; 0:6:1, e 4:2:0) in the nutrient solution. The experimental unit was a plastic pot with three liters of solution, containing two plants. The total dry matter and nutrient accumulation were evaluated. The relationship calcium:potassium:sodium influenced all the appraised characteristics, and the solutions containing calcium, potassium and sodium in the ratios 4:2:1 and 3:3:1 resulted in seedlings development with larger production of dry matter and larger accumulation of nutrients.

Keywords : Açaí; Euterpe oleracea; propagation.