Produção de cladódios jovens de genótipos de palma forrageira sob salinidade da água

Abstract

Water is the most limiting factor for agricultural production, especially in arid and semiarid regions, to enable cultivation in these areas, then. biosaline agriculture can be used. However, we must find species that are able to produce, even at high salinity levels, which can be obtained by identifying forage palm genotypes with greater tolerance, since the effects may vary between genotypes. Thus, the objective was to study the production of young cladodes of forage palm genotypes under water salinity levels. The experimental design used was in randomized blocks, with treatments formed from a split-plot scheme, where five levels of salinity were studied (0,14 dS m-1; 1,50 dS m-1; 3,00 dS m-1, 4,50 dS m-1 e 6,00 dS m-1) in the plots and two species of forage palm “Miuda” or Doce; ‘IPA Sertânia’, both of genus Napolea, in the subplots, with three plants per sample unit and repeated in five blocks. The plants were cultivated in vases filled with soil-based substrate, the plants were irrigated weekly, and the water demand was estimated through weighing lysimetry. Sprout samples between 10 and 20 cm in length were collected weekly, the morphometric variables were analyzed, at 114 days, the growth, chemical, and production variables of the mother plant (PM) were determined. The salinity reduces sprout production from 3,0 dS m-1 in both genotypes of forage palm. The “Miúda” palm has better performance than “IPA Sertânia” in saline water cultivation.