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RESPONSE OF SUGARCANE TO IRRIGATION LEVELS IN COASTAL TABLE LANDS OF PARAÍBA STATE – BRAZIL

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032226,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13804) @2003
Authors:   Hamilton Medeiros de Azevedo, José Dantas Neto, Carlos Henrique de Azevedo Farias, Carlos Alberto Vieira de Azevedo, Roberto Vieira Pordeus
Keywords:   irrigation, performance, infiltrated water depth, sugarcane

This research had the purpose of studying the response of sugarcane crop (Saccharum officinarum L., variety SP-79 1011) to different irrigation water depths. An experiment was conducted in the Capim Farm at the Miriri distillery, in the municipality of Capim, Paraba State, Brazil, which consisted of a scheme with completely casualized plots and with three replications, where the irrigation water depths studied were W0=0, W1=152, W2=303, W3=308, W4=344 and W5=397 mm. The water application was made by a mobile Center Pivot irrigation system. The water amount applied was equal to the Class A pan evaporation tank subtracting the effective precipitation. The mean production of the gross sugar was 12.3 t ha-1, and the lowest and the highest values were, respectively, equal to 6.7 t ha-1 (W0=0 mm) and 6.3 t ha-1 (W2=303 mm). The irrigation water depths of 397 and 308 mm promoted, respectively, the maximum yield (11,609.00 L ha-1) and the maximum net income (R$ 1,439.00 ha-1). The maximum net income was 2.6, 1.1, and 1.2 times higher than the incomes generated, respectively, by the irrigation water depths of 0, 344 and 397 mm. It was verified that the state mean production of alcohol gross yield, estimated in 3,451.00 L ha-1, represents 34% and 32%, respectively, of the alcohol gross yield and of the net income obtained by water irrigation depth equal to 308 mm, that promotes the maximum net income.

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