Efficiency of the mixture of ripeners and of the association of boron and silicon via foliar application to sugarcane (Saccharum officinarum L.)

• Grant number: 07/00034-1
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2007
• End date: August 31, 2009
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Carlos Alexandre Costa Crusciol
• Grantee: Carlos Alexandre Costa Crusciol
• Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

The object of the research is to evaluate the efficiency of ripener mixtures, with different mechanisms of action, and the association of boron and silicon via foliar application, by means of biometric, biochemical and technological evaluations, as well as the residual effect in the re-growth of the sugarcane rootstock, both in the application at the start and at the end of the harvest. Consequently, the present research project will consist of 3 experiments set up and carried out in October 2006, March and October 2007 and March 2008 (totaling 12 experiments) in sugarcane second harvest, in the Fazenda Bosque, situated in the municipality of Igaraçú do Tietê, State of São Paulo, belonging to the Cosan Group; Barra Unit (Barra Factory). The experimental outline used in all the experiments will be in random blocs with five repetitions. In the experiments at the start of the harvest the RB855453 (early ripening) variety will be used, and at the end of the harvest the SP80-3280 (late ripening) variety. Experiment 1 will consist of two treatments: the application of three chemical ripeners (KNO3, Sulfometuronmethyl and Glyphosate) plus the control bloc (natural ripening) associated with B foliar (with and without application); experiment 2 will consist of the following treatments: the application of three chemical ripeners (KNO3, Sulfometuron-methyl and Glyphosate) plus the control bloc (natural ripening) associated with Si foliar (with and without application). Experiment 3 will consist of the following treatments: 1 – control bloc, without application of ripener, 2 – application of Glyphosate, 3 – application of Sulfometuron-methyl, 4 – application of Trinexapac ethyl, 5 – application of the mixture Glyphosate and Sulfometuron-methyl and 6 – application of the mixture of Glyphosate and Trinexapac ethyl. The application of the treatments will occur in the months of March and September/October. The biochemical, biometric and technological results will be evaluated. The results will be subjected to variance analysis and the averages compared by DMS to 5 per cent probability. (AU)