DRIP IRRIGATION SYSTEM PERFORMANCE WITH SALINE WATER APPLICATION
2016
Brito, C.F.B. | Fonseca, V.A. | Santos, M.R.
The knowledge of uniformity coefficients and application of water for irrigation is of fundamental importance to obtain an area adequately irrigated and greater application efficiency values gives more water use efficiency. The objective with this study was to evaluate the performance of irrigation systems with application of saline water in crop pineapple and forage cactus in field conditions. The test was developed in two experiments with drip irrigation, with self-compensating emitter with a discharge of 8 L h-1 in the pineapple and the other with labyrinth emitter with a flow rate of 4 L h-1 in forage cactus, applying different irrigation depth. The uniformity coefficient testing and application were performed at 180 and 360 days after the start of system operation. The labyrinth dripper presented Chirsthiansen’s uniformity coefficient values (CUC), statistical uniformity coefficient (SUC), distribution uniformity coefficient (DUC) and application efficiency (Ae) considered excellent for four irrigation depths in both seasons. For self- compensating emitter, hese coefficients were considered good for irrigation depth application of 50 and 75% of ETc to 180 days of the start and 125% of crop evapotranspiration to 360 days of water application.
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