IRRIGATION DEPTHS IN SUGARCANE CROP WITH DRIPIRRIGATION SYSTEMS. KrishnaprabuAbstract ABSTRACT This study aims to evaluate the growth and development of sugarcane under different supplemental irrigationdepths. Irrigation treatments were 0.30, 0.60, 0.90 and 1.2 rate of crop evapotranspiration (ETc) and thecontrol (no irrigation). The experimental design was a randomized complete block with six replications.The highest yield was ratoon cane with 190 t ha-1 in the treatment 0.6 of ETc. The difference between thehighest and lowest yield were 11 and 7% in plant cane and ratoon cane, respectively. The rate of maximumtechnical efficiency of yield was 0.78 of ETc. Irrigation water productivity and water productivity wasobtained in 35.8 to 146.0 kg m-3 and 18.0 to 70.9 kg m-3, respectively. The total mass and the dry massshowed increase of 20 and 25% in ratoon cane, respectively. The plant height showed no difference betweentreatments. The highest: number of tillers, leaf area and number of green leaves was treatment 1.2 of ETc.The deficit and excess moisture affect plant development, plant height, leaf area, stem diameter, number oftillers per meter, full mass and dry mass, affects the yield of sugarcane.
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