Cotton water status under not-till and tillage systems in a sandy soil

• Grant number: 21/10701-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2021
• End date: October 31, 2022
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Fábio Rafael Echer
• Grantee: Alana Maria Correia Ferreira
• Host Institution: Pró-Reitoria de Pesquisa e Pós-Graduação. Universidade do Oeste Paulista (UNOESTE). Presidente Prudente , SP, Brazil

Abstract

Sandy soils have low water retention capacity and periods with low rainfall cause water deficit in the plant, which exposes it to a state of stress compromising its growth and development. The aim of the study will be to evaluate the physiological parameters of the plant, related to water status and the productivity of the odoper as a function of soil management systems. The experiment will be conducted in a sandy-textured Latosol, in a randomized block design with 5 replications. The types of management will be allocated in the plots: Conventional system with soil preparation in May, a conventional system with soil preparation in September, non-scarified no-sowing system, and scarified no-tillage system. The millet will be used as a roofing plant in all systems. The accumulation of dry matter mass of the odoper and the leaf area index at 25, 50, 80, 110, and 140 days after emergence (DAE) will be evaluated. Physiological evaluations will be carried out in full flowering: gas exchange (photosynthesis, stomatic conductance, transpiration, internal concentration of CO2), leaf water potential, proline content, and carbohydrate content. In cotton harvesting, fiber yield will be evaluated and correlations will be established between the parameters evaluated. The statistical study will be carried out by analysis of variance and the means will be compared by the Tukey test, at 5% probability. The correlation of physiological data with the productivity of the operand will be performed by the Person Correlation method. (AU)