Abstract
Oiticica is a forest species endemic to the semi-arid regions of Brazil, where the salinity water has caused reductions in the quality of seedlings, including oiticica. The objective of this study was to evaluate the effects of the proportion of organic matter in the substrate on the growth and quality of oiticica seedlings irrigated with brackish water. The experiment was conducted in a randomized complete block design, in a 4 × 2 factorial, with four proportions: organic matter to mineral soil ratios of 0:1, 1:1, 2:1 and 3:1 and two irrigation treatments. non-saline (0.5 dS m-1) and brackish water (4.5 dS m-1) water. Biomass characteristics and Dickson Quality Index were evaluated. Elevated irrigation water salinity compromised the biometric growth, dry mass accumulation, and the quality of oiticica seedlings. The addition of organic compound to the substrate is limited to the formation of oiticica seedlings.
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