Sensitivity of sugarcane to excess groundwater

• Grant number: 06/61654-4
• Support Opportunities: Regular Research Grants
• Start date: June 01, 2007
• End date: May 31, 2009
• Field of knowledge: Agronomical Sciences - Agricultural Engineering - Soil and Water Engineering
• Principal Investigator: Sergio Nascimento Duarte
• Grantee: Sergio Nascimento Duarte
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

The objective of this work is to determine the effect of different speeds of decreasing the freatic level, in different stages of the development of sugarcane, as well as to obtain an equation which correlates relative productivity with the daily stress index (DSI). The experiment will be conducted in 64 lysimeters, in an experimental layout of randomized blocs, arranged in a factorial scheme of (3 x 5 + 1), comprising 3 stages of development, 5 speeds of decrease in freatic level plus one control bloc that will not suffer stress through excessive humidity. The results obtained will make it possible to obtain a drainage criterion to calculate the spacing of drains using equations of non-permanent movement. The equation that correlates to productivity relative to the DSI will be used in the model Sisdrena (MIRANDA, 1997) for estimates of the most economical spacing between drains, for the regions of Ribeirão Preto and Piracicaba. (AU)