Resumo

LIZARAZO, MIGUEL ÁNGEL; CAMILO ANDRES, HERNÁNDEZ; FISCHER, GERHARD  e  GOMEZ, MANUEL IVÁN. Biomass, foliar parameters and symptomatology in response to different levels of manganese, zinc and boron in the banana passion fruit (Passiflora tripartita var. mollissima). rev.colomb.cienc.hortic. [online]. 2013, vol.7, n.1, pp.31-45. ISSN 2011-2173.

In order to observe the effects of manganese (Mn), zinc (Zn) and boron (B) on dry mass (DM) allocation, canopy growth and nutritional deficiency symptom expression in the banana passion fruit; three levels of fertilization were evaluated: none (0), low (1) and high (2), for each element and compared to complete fertilization (control), with a randomized complete block design. The banana passion fruit plants were transplanted to plastic pots containing a substrate made of quartz sand, with irrigation twice a week and fertigation once a week. The evaluated variables were total dry weight (TDW), percentage of dry mass allocation, leaf area (LA), number of leaves (NL), specific leaf area (SLA) and leaf area ratio (LAR). In addition, a photographic record was taken to recognize symptomatology in the leaves. At different levels of each element, restriction of the TDW was found, with the zero level being the most limiting. The DM distribution showed an increase between 1 and 14% of accumulation in roots of the treatments compared to the control. The NL and LA were quite limited at the zero level of each element and, to a lesser extent, in the levels 1 and 2. The SLA was high in all treatments, except Mn0 and B0, relative to the control. The LAR was equal to the control in all treatments, except Mn2 and Zn0. Visual signs of nutritional deficiency in the leaves were observed only in the Mn0, Zn0 and B0 treatments, evidencing classic symptoms for each element, according to reports on other species of the same genus.

Palavras-chave : micronutrients; dry mass; accumulation; leaf area; deficiency symptoms.

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