The efficiency of three different organic substrates (carbonised rice hull, dry and green coir dust) and two fertilizers (Vitasolo® and humus of earthworm), were evaluated in factorial scheme (3x2) at the ratio of 3:1 (v/v) in the acclimatization of plantlets of Heliconia bihai, obtained from in vitro culture. The following pre-defined orthogonal contrasts were set up: coir dust (green or dry) x carbonised rice hull; green coir dust x dry coir dust; Vitasolo® x humus of earthworm. After 75 days, height of the plants, diameter of pseudo-stem, number of leaves and area of the third leaf were evaluated. In relation to all the variables studied, the carbonised rice hull was more efficient than the coir dust (green or dry); there wasn't significant difference between dry or green coir dust; among the tested fertilizers, humus of earthworm was more efficient than Vitasolo®.
Heliconia bihai; micropropagation; acclimatization; substrates
