Resumen

CRUZ-CASTILLO, J. G. et al. Vermicompost and postharvest stages of spathe development of 'Green Goddess' calla (Zantedeschia aethiopica (L) K. SPRENG) in tropical conditions. Rev. Chapingo Ser.Hortic [online]. 2008, vol.14, n.2, pp.207-212. ISSN 2007-4034.

Studies with the 'Green Goddess' callas were carried out in a tropical highland area. Potted plants were grown under 35% shade with several vermicompost types: coffee pulp; coffe pulp + bovine manure; coffee pulp + chicken manure + sugar cane straw. Other treatments were coffee pulp + chemical fertilizer (12(N)-11(P)-18(K)-3 mg) + Organozyma^® (natural growth biostimulator). Leaf area emerged shoots number, and floral peduncle lenght were significantly higher in vermicompost treated plants than those chemically treated with fertilizers and Organozyma^®. Flower peduncles from treated plants were harvested and put in glass flasks, and all treatments were statistically similar in postharvest longevity. Using a temperature sensor, a total of 1,717 heat hours of 7 °C were needed from 15 cm of length plants until harvest. The maximum, minimum and all day average temperatures per month during the growth period of the crop were 21.1 °C (October), 7.8 °C (December) and 16.6 °C (November), respectively. In a different study, a harvest index for 'Green Goddess' calla was established. When the spathe was open enough to observe the spadix, the postharvest longevity was 37 days without any flower quality decrement.

Palabras llave : calla lily; substrates; vermicompost; calla harvest.

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