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Growth of cactus pear cv. Miúda under different salinity levels and irrigation frequencies

2018; Brazilian Academy of Sciences; Volume: 90; Issue: 4 Linguagem: Inglês

10.1590/0001-3765201820171033

1678-2690

Joelma de Lira Freire, Mércia Virgínia Ferreira dos Santos, José Carlos Batista Dubeux, Egídio Bezerra Neto, Mário de Andrade Lira, Márcio Vieira da Cunha, Djalma Cordeiro dos Santos, SILVANIA O. DE AMORIM, Alexandre Carneiro Leão de Mello,

Seed Germination and Physiology

Soil and water salinity are considered the main limiting factors of plant production. This work aimed to evaluate the influences of irrigation frequency and soil salinity on the development of cactus pear cv. Miúda (Nopalea cochenillifera Salm Dyck). The experiment was conducted in factorial arrangement of four salinity levels: 0.3 (control), 0.5 (low), 1.5 (medium) and 3.6 (high salinity) (ds m-1), associated with four irrigation frequencies (each 7, 14, 21 and 28 days) and two soil textures (sandy and sandy loam) in a randomized block design with four replicates. One cladode was planted in each polyethylene pot containing 10 kg of soil. The soil texture influenced some of the morphological characteristics of the cactus pear, so that plants grown in sandy loam soil yielded higher number of cladodes (9.47) and higher productivity (62.1 g plant-1). The sandy soil produced plants with fewer cladodes (4.50). Irrigation water with a salinity level of 3.6 ds m-1 and an irrigation frequency of 7 days showed higher soil electrical conductivity (48.65 dS m-1) and plants with a higher damage (5.0) and lower productivity (32.51 g plant-1), indicating a low tolerance of the cv. Miúda to salt stress.