Diagnósticos da salinidade do solo e da água no perímetro irrigado Engenheiro Arcoverde.

Abstract

Soil salinization has become one of the main issues faced by agriculture in arid and semi-arid regions and the problem is aggravated when the scarce supply of water is taken into consideration. This essay aims, majorly, to characterize the soil and water when it comes to salinity in the Engenheiro Arcoverde Irrigated Perimeter in the municipality of Condado, in order to diagnose the situation of salinization of soil and water and establish strategies for the use of these for sustainable agricultural purposes. Simple water collections and soil samples were collected in the 0-20 cm and 20-40 cm layers, with the collection of 20 sub-samples for each 10 ha, which were standardized to compose a composite sample. The samples were collected in two seasons; in the month of June, corresponding to the post rains period and with milder temperatures, and in November, considered one of the hottest months and with the greatest precipitation deficit. The soils of the irrigated perimeter Engenheiro Arcoverde, even in the dry period, were classified as non-saline and non-sodic. Localized irrigation provides a greater increase in soil salinity, therefore more tolerant crops should be used. The water utilized increases the bicarbonate content in the soils and the pH, making them alkaline during the drought period. Used water samples offer moderate risk of infiltration problems. There is no risk of salination or phytotoxicity by sodium and chlorine from the use of irrigation water