Cumulative salt stress in coloured cotton genotypes

ISBN-13: 9786203908855 / Angielski / Miękka / 104 str.

Lauriane Almeida dos Anjos Soares; Pedro Dantas Fernandes; Geovani S. de Lima

Opis

The scarcity of good quality water is a limiting factor for irrigated agriculture, especially in arid and semi-arid regions, and it is necessary to identify genotypes with economic potential that are tolerant to saline stress, as well as appropriate strategies for irrigation with saline water. The aim was therefore to assess the tolerance of coloured cotton genotypes to cumulative salt stress at different stages of plant development, as well as the influence of the salinity conditions in which the seeds were formed in a new cultivation cycle. Two experiments were carried out in a greenhouse, evaluating three naturally coloured cotton genotypes. In the first experiment, seven salinity management strategies were studied, varying the quality of the water applied at different stages of the cycle. In the second experiment, the effects of using water with high salinity (9 dS m-1), alternating with water with a low salt concentration (0.8 dS m-1), on the production of plants from seeds harvested in the first experiment were evaluated, subjected to ten salinity management strategies, also varying the phenological stage of the cotton plants.