Efeito da deficiência hídrica na fase inicial de crescimento da planta na produção de frutos de tomate (Lycopersicon esculentum Mill.).

• Ano de defesa: 1995
• Autor(a) principal: Nunes, João Bosco da Costa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Agronomia
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/43492

A field experiment, conducted on an eutrophic alluvial soil and under semiarid climatic conditions, determined the effects of four water regimes on yield and quality of the processing tomato Lycopersicon esculentum Mill. cv. Santa Adélia. The control treatment (T1) consisted of watering whenever soil matric potential reached the minimum level of -25 kPa. In T2, T3, and T4 treatments the first irrigation was applied at 21, 36, and 50 days after planting, respectively, with the next water applications following the control pattern. The water stress level of -45 kPa, reached at 50 days after the planting date and just before restarting irrigation (T4), determined significant reduction on weight (55%) and number of fruits (55%) per area compared to -25 kPa of the control (T1). T2 and T3 treatments did not significantly affect fruit yield. Fruit size, as estimated by its mean weight, and quality, by its juice content, PH, acidity and soluble solids did not show a clear response to soil water regimes. Leaf water potential showed no significant response to treatments but its variation tended to follow that of soil matric potential.