Potential of Brackish Groundwater for Different Biosaline Agriculture Systems in the Brazilian Semi-Arid Region

The objective of this research was to define the potential brackish groundwater for 15 systems biosaline agriculture in a representative area Brazilian semi-arid region. study conducted using database State Ceará, with 6284 wells having water (EC ? 0.8 dS m?1 and discharge rate 0.5 m3 h?1). Our results show that resources depends on set data: (i) production system (crop salt tolerance demand) (ii) source (salinity well rate). joint analysis these data shows plant lesser requirements, even moderate levels stress, present better than more tolerant species, including halophytes coconut orchards. About 41, 43, 58, 69, 82% have enough rates irrigate forage cactus (1.0 ha), sorghum ha supplemental irrigation), hydroponic cultivation, cashew seedlings, respectively, without restrictions terms salinity. Otherwise, 65.8 71.2% do not yield an 1.0 palm trees, butmore 98.3 90.7% reach salinity threshold crops. also indicates need diversification use multiple farms (intercropping, association fish/shrimp plants), sustainability tropical drylands, especially family farming.