02101naa a2200265 a 450000100080000000500110000800800410001902400340006010000250009424500940011926000090021352013170022265000150153965000200155465000160157465000110159065000200160165000160162165300100163765300210164770000250166870000260169370000200171977300960173920496182017-01-10       2015    bl uuuu     u00u1 u    #d7 a10.9755/ejfa.2015-04-0752DOI1 aMIRANDA, J. M. de S.  aAdvances on apple production under semiarid climatebN fertigationh[electronic resource]  c2015  aThe fertilizing management for apple tree is essential, especially for nitrogen, one of the most important nutrients affecting fruit yield. Thus, an experiment was conducted in 2012 and 2013 to evaluate the fruit production, yield and leaf chlorophyll of ?Princesa? and ?Eva? apples as a function of nitrogen fertigation under Brazilian semiarid conditions. The experimental design consisted of randomised blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa); and nitrogen doses (160, 120, 80 and 40 kg of N ha-1), with four replications and three plants. Calcium nitrate was used as nitrogen source (15.5% of N) with applications twice a week during 40 days, reaching 12 fertilizing performances through irrigation water. The following variables were evaluated: i) fruit production per plant (kg plant-1); ii) fruit yield (t ha-1); iii) number of fruits per plant; iv) leaf chlorophyll meter readings (index); and v) leaf nitrogen concentration (g kg-1). Princesa apple cultivar if compared to ?Eva? presents a better fruit production performance under Brazilian semiarid. Furthermore, nitrogen doses fertilized through irrigation water have no effect on fruit production of Eva and Princesa apple cultivars during the first production cycle.  aAdubação  aFertirrigação  aIrrigação  aMaçã  aMalus Domestica  aNitrogênio  aApple  aFruit production1 aCAVALCANTE, I. H. L.1 aOLIVEIRA, I. V. de M.1 aLOPES, P. R. C.  tEmirates Journal of Food and Agriculture, Abu Dhabi-Al Aingv. 27, n. 10, p. 744-748, 2015.