Millet survival submitted to associated stress using generalized gamma and Burr XII distribution

• Autor(a) principal: Lucena, Leandro Ricardo Rodrigues de
• Data de Publicação: 2020
• Outros Autores: Leite, Maurício Luiz de Mello Vieira, Almeida, Mirna Clarissa Rodrigues de, Simões, Vicente José Laamon Pinto, Costa, Álefe Chagas de Lima, Oliveira, Antonio Dennys Melo de, Caraciolo, João Pedro Soares
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/8308
• topic: Déficit hídrico; Estrés salino; Función de supervivencia; Tiempo de vida.; Lifetime; Saline stress; Survival function; Water deficit.; Déficit hídrico; Estresse salino; Função de sobrevivência; Tempo de vida.

Water and saline stresses are the main factors affecting agricultural production. Millet is tolerant to these abiotic stresses and cultivated in regions with scarcity of rain and used for the production of grains and pastures. The knowledge of the lifetime of forage plants provides very useful information on cultivation and management of populations. The objective was to evaluate the lifetime of millet under conditions of water and saline stress using survival analysis. The experiment was carried in 48 millet plants submitted the water and saline deficit, for 4 cycles of 105 days. To estimate the lifetime of the millet, we used the survival functions of the probability distributions: exponential, Weibull, Gumbel, log-normal, Gompertz, logistics, Gamma, generalized Gamma, Burr XII and Birnbaum-Saunders and the Kaplan-Meier estimator. The lifetime of 64.6% of the plants was less than 105 days. Using the Kaplan-Meier estimator, 50% of plants survive up to 65th day, using the generalized Gamma and Burr XII survival function this rate occurs on the 75th day. The generalized Gamma and Burr XII survival function are alternatives to estimate the lifetime of millet submitted to conditions of water and saline stress.