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Effects of organic fertilizers and substrates on developmentof micropropagated heliconia plantlets The efficiency of three different organic substrates (carbonisedrice hull, dry and green coir dust) and two fertilizers (Vitasolo® andhumus of earthworm), were evaluated in factorial scheme (3x2) atthe ratio of 3:1 (v/v) in the acclimatization of plantlets of Heliconiabihai , obtained from in vitro culture. The following pre-definedorthogonal contrasts were set up: coir dust (green or dry) x carbonisedrice hull; green coir dust x dry coir dust; Vitasolo® x humus ofearthworm. After 75 days, height of the plants, diameter of pseudo-stem, number of leaves and area of the third leaf were evaluated. Inrelation to all the variables studied, the carbonised rice hull was moreefficient than the coir dust (green or dry); there wasn’t significantdifference between dry or green coir dust; among the tested fertilizers,humus of earthworm was more efficient than Vitasolo®. Keywords: Heliconia bihai |
