Photochemical and phytomass aspects of pomegranate seedlings grown under water salinity and foliar nitrogen fertilization

Pomegranate is a fruit with potential for exploitation in the Brazilian Northeast as medicine and food. However, qualitative quantitative scarcity of water resources common this region, requiring use high salt contents irrigated agriculture. The adoption strategies to reduce harmful effects stress plants therefore necessary, foliar nitrogen (N) fertilization promising alternative. objective work, therefore, was evaluate photochemical phytomass aspects pomegranate seedlings grown under irrigation salinity fertilization. experiment performed randomized block design, an incomplete factorial scheme, five levels electrical conductivity - ECw (0.50, 1.15, 2.75, 4.35 5.00 dS m-1) doses N (0.0, 0.33, 1.97 2.30 g L-1), totaling nine combinations, generated by Central Composite Design, four repetitions two per repetition. Foliar application at dose 1.37 L-1 increased production leaf root dry 90 days after emergence. Salt reduced activity seedlings, while there stimulus increasing up 2.3 L-1.
 Keywords: nitrogen, efficiency, Punica granatum L., stress.