Morphophysiology and production of guava as a function of water salinity and salicylic acid

ABSTRACT The availability of water with low electrical conductivity for irrigation in the Northeastern semi-arid region is one limiting factors expansion irrigated agriculture. Thus, it necessary to use waters high conductivity, requiring search strategies reduce negative impacts salts on plants. In this context, objective study was evaluate morphophysiology and production guava cv. Paluma subjected saline foliar application salicylic acid after grafting. experiment conducted under greenhouse conditions Campina Grande - PB, Brazil, a randomized block design, adopting 2 × 4 factorial scheme, two values ECw (0.6 3.2 dS m-1) four concentrations (0, 1.2, 2.4 3.6 mM), three replicates. Irrigation m-1 reduced gas exchange, rootstock scion diameters, crown diameter volume, vegetative vigor index, polar equatorial diameters fruit, number fruits, mean fruit weight, fresh weight fruits Paluma. Salicylic up mM did not mitigate effects salt stress grafted Paluma, at 390 days transplanting.