Revista Brasileira De Herbicidas 2017; 16(1): 67-75
Technological parameters of sugarcane submitted to chemical ripening agents in the early harvest
The use of chemical ripeners is a reality in the sugarcane sector. The objective of this work was to evaluate the technological and productive parameters of sugarcane when submitted to the application of chemical ripeners in the beginning of the harvest. The experimental design used was in randomized blocks arranged in split plots with four repetitions. The main plots consisted of the application of the following products with their respective dosages: control – without application; sulfometuron-methyl 0.02 kg ha-1 + glyphosate 0.15 L ha-1; ethephon 0.34 L ha-1 + glyphosate 0.15 L ha-1; glyphosate 0.35 L ha-1; compounds of organic carboxylic radicals – CC 1.0 L ha-1 + glyphosate 0.15 L ha-1. The subplots were composed of many different evaluation times: 0; 15 and 30 days after the application of products. The samples were collected manually and sent to the laboratory to determination of the brix, pol; reducing sugars; total reducing sugars; fiber; purity; humidity; theoretical recoverable sugar. Moreover, the productive parameters were determined: tons of culms per hectare and tons of sugar per hectare. Lastly, it was made the analysis of contents of shikimic acid and salicylic acid. The application of the mixture of chemical ripening compounds of organic carboxylic radicals + glyphosate showed an increase for the technological parameters of sugarcane15 days after application (DAA), followed by the treatment with application of glyphosate at 30 DAA.
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