STOMATAL CONDUCTANCE AND LEAF AREA OF MELON UNDER SALINE STRESS IN DIFFERENT SOILS

• Autor(a) principal: Lima, Breno Leonan de Carvalho
• Data de Publicação: 2011
• Outros Autores: Nascimento, Iarajane Bezerra do, Medeiros, José Francismar de, Alves, Samara Sibelle Vieira, Dombroski, Jeferson Luiz Dallabona
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Verde de Agroecologia e Desenvolvimento Sustentavel
• Texto Completo: https://www.gvaa.com.br/revista/index.php/RVADS/article/view/598
• topic: Cucumis melo L.; crescimento da planta; salinidade; Cucumis melo L.; Plant growth; Water salinity; Cucumis melo L.; Crescimento da planta; Salinidade

This work was carried out in a green house at Environmental Sciences Department at Federal Rural University of Semi Arid, in Mossoró, RN, Brazil, from august to September 2010. The objective of the work was to study the irrigation water salinity effects on leaf area and stomatal conductance of yellow melon hybrid ‘Mandacaru’, grown in different soils. Soil samples were collected in the 0-20 and 20–40 cm depths, on areas of the region, usually cultivated with fruits and vegetables. Experimental design was a randomized blocks in a 5x6 factorial scheme, with three replications. Factors studied were five soil types: S1 (Typic Quartzipsamment), S2 (Arenic Hapludult), S3 (Typic Eutrochrept), S4 (Typic Udifluvent) and S5 (Aquic chromudert), and six irrigation water salinity levels: 0.5, 1.0, 2.0, 3.0, 4.0, and 5.0 dS.m-1, obtained from mixture of waters with electrical conductivity of 0.56 dS.m-1, and CE 5.56 dS m-1. Salinity effect on melon plant leaf area was variable, depending on the soil type considered. Irrigation water salinity reduced stomatal conductance of melon plants. Stomatal conductance presented a maximum peak at 8:00 PM for most soils studied.