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vol.25 número2EVOLUCIÓN DE LAS EXPORTACIONES DE ACEITUNAS DE CHILE ENTRE LOS AÑOS 1993-2005 índice de autoresíndice de assuntospesquisa de artigos
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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

MENDEZ-NATERA, Jesús Rafael; LARA, Leonardo  e  GIL-MARIN, José Alexander. EFFECT OF DRIP IRRIGATION ON INITIAL GROWTH OF THREE COTTON (GOSSYPIUM HIRSUTUM L.) CULTIVARS. Idesia [online]. 2007, vol.25, n.2, pp.7-15. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292007000200002.

In Venezuela, there is a lack of information about drip irrigation in cotton crop, because of the following; an experiment was carried out in order to evaluate the effect of drip irrigation on three vegetative characters and a reproductive one at 38 days after swing in three cotton cultivars. A split plot design was used, the main plots were four irrigation doses, id est, 40, 60, 80 and 100% of the evaporation of a type A pan on soil with pasture cover and the sub-plot were three cotton cultivars. Three replications were used. A two-day irrigation frequency was used and the fertilization was applied using fertigation method with a Venturi applying 1 kg of fertilizer Solub 18-18-18 with micronutrients/20 liters of water. A different response of cultivars according to irrigation doses was found in all traits evaluated. For cultivars Cabuyare and Stroman, increments of irrigation doses produced taller plants with more leaves, while for Deltapine 16 this effect was observed up to 80% irrigation doses. Also, increments of irrigation doses produced early flowering plants with bigger stem diameter in cultivars Cabuyare and Stroman, cultivar Deltapine follow a similar trend, excepting 60% irrigation doses where late flowering plants occur with lesser stem diameter. These results indicate that increments of irrigation doses produced incremented vegetative traits and early flowering plants of the three cotton cultivars.

Palavras-chave : Drip irrigation; cotton; Gossypium hirsutum; evaporation pan.

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