Sistema Brasileiro de Classificação de Terras para Irrigação aplicado em bacia hidrográfica de região semiárida.

Abstract

The work aimed to study the potentially irrigable areas and their suitability for different cultures and systems in the watershed of the region of the middle Paraíba course. For the classification, the SiBCTI program was used, where the interaction soil x irrigation system x specific culture x quality and cost of water was evaluated to determine the class of land suitability for irrigation. Maize (Zea mays L.), beans (Vigna unguiculata (L.) Walp.), banana (Musa spp), watermelon (Citrullus lanatus) and grape (Vitis vinifera L.) were selected for classification. Areas with very low potential predominated throughout the hydrographic basin with land in class 6 suitable for irrigation. These environments are the least recommended for irrigated management, as they do not have land considered irrigable in the places. In these environments, soils with physical and/or chemical limitations occur, in terms of soil depth, reduction zone and available water capacity, which can make certain practices for irrigated management difficult or even unfeasible. Of the cultures studied, it was observed that corn and beans are cultivated in the area, and the results demonstrated the possibility of expanding the cultivation using sprinkler irrigation. As for permanent crops, banana cultivation and the possibility of expanding irrigated form were observed.