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Artigo

Effect of a seaweed extract on the productivity of ‘de Nules’ clementine mandarin and navelina orange

Resumo

O extrato de algas marinhas (Goemar Spring Citricos(R)) de Ascophyllum nodosum foi aplicado em árvores de tangerina ‘de Nules’ e laranja Navelina na brotação, na plena floração e no fruto, no final de junho, na concentração de 0,15% para 0,30%. O extrato de algas aumentou o rendimento da tangerina ‘de Nules’ em 11%. A aplicação de 6 mg L-1 de ácido giberélico (GA(3)) a esta cultivar em plena floração aumentou o rendimento em 22%, e a combinação de extrato de algas marinhas e GA3 resultou em um aumento de 41% no rendimento. O peso médio dos frutos foi reduzido pela combinação GA(3)-extrato de algas marinhas, mas a quantidade de frutos comercializáveis aumentou. Na laranja Navelina, o extrato de algas marinhas na concentração de 0,15% aumentou o rendimento em 8%, enquanto na concentração de 0,30% aumentou o rendimento em 15%. Não foram observadas diferenças significativas no peso médio dos frutos desta cultivar.



Abstract

A seaweed extract (Goemar Spring Citricos(R)) from Ascophyllum nodosum was applied to trees of ‘de Nules’ clementine mandarin and Navelina orange at bud sprouting, at full bloom and at the end of the June drop, at a concentration from 0.15% to 0.30%. The seaweed extract increased the yield of ‘de Nules’ clementine mandarin by 11%. The application of 6 mg L-1 gibberellic acid (GA(3)) to this cultivar at full bloom increased the yield by 22%, and the combination of seaweed extract and GA3 resulted in a 41% increase of yield. Mean fruit weight was reduced by the GA(3)-seaweed extract combination, but the amount of marketable fruit was increased. In Navelina orange, seaweed extract at a concentration of 0.15% increased the yield by 8% whereas at a concentration of 0.30% it increased the yield by 15%. No significant differences were observed in the mean fruit weight of this cultivar.



F. Fornes
M. Sánchez-Perales
J. L. Guardiola

2002 - Botanica Marina

Palavras-chave:

macroalgas, frutos, desenvolvimento, rendimento

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