Effect of Sodium Nitroprusside (SNP) on Minerals Content of Cabbage Brassica oleracea var. capitata L. Grown under Salt Stress

Abstract

The experiment was conducted during the winter season of 2017-2018 and 2018-2019 at directorates of agriculture in Al-Zubair district, Basrah, Iraq to study the effect of sodium nitroprusside (SNP) at four concentration (0, 50, 100 and 150) μM with number of sprays (once and twice) and three cultivars (Pruktor F1, Luna and Rain ball F1) on mineral content of Nitrogen (N), Phosphorous (P), Potassium (K), Sodium (Na), Potassium/Sodium (K+/Na+) ratio, Chloride (Cl-), Sulfur (S) and Iron (Fe) of leaves. Split-Split Plot design was used with three replicates per treatment. The means of treatments were compared by L.S.D. at 0.05 probability. Results indicated that Pruktor F1 had the highest percentage of N, P, K, K+/Na+ ratio for both growing seasons while the highest accumulation of Na and Cl- in Rain ball F1 cultivar. Plants sprayed twice with SNP had a significant increase in P, K, K+/Na+ ratio, S, and Fe comparing with once spray for both growing seasons. PruktorF1 sprayed with SNP at 100 μM twice time was superior in P, K, K+/Na+ ratio, S and Fe, whereas, the same cultivar at 150 μM concentration was superior in N for both growing seasons, same cultivar at 100 and 150 μM sprayed twice time gave the lowest percentage of Na+ and Cl–, respectively. Also Rain ball F1 at control treatment had the highest accumulation of Na and of Cl-.