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| Effect of Salinity and NPK Fertilizer on the Total Soluble Solids (TSS) and N, P and K in Tomato Plants (lycoperisiconesculentum L) |
wadia A . Ahamed, Ammar M. S. Abdalla
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Abstract:
Abstract: This Study was conducted during October- March 2011/2012 and 2012/2013, seasons at Ministry of Agriculture green house in Dongola, Northern Sudan, to investigate the effect of salinity levels (0,2,4,6,8,10 and12ds/m) and, 0, -75kg/ ha, -150kg/ha and -225kg/ha NPK fertilizer on the total soluble solids (TSS)and nitrogen, phosphorus and potassium in the plant leaves of tomato in clay -loam soil. A randomized Complete Block Design (RCBO) with three replicates was used for laying out the pot experiments. Immediately after the termination of the experiments fruits, and plant leaf samples were collected in both seasons from each treatment to determine the amounts of total soluble solids (TSS)and nitrogen, phosphorus and potassium in the plant leaves. The results clearly indicated that (TSS), were significantly reduced with increasing salt concentration, whereas they were significantly increased with increasing of NPK application rate. The results showed that the total soil nitrogen was very low, whereas appreciable percentages were found in the leaves. There were significant differences between salt concentration and NPK application rate,the N, P and K up taken by plants increased with an increase of NPK application rate and a decrease of salt concentration In contrast both P and K in plant leaves decreased with increase in salt concentration and decreased NPK application rate, portably due to their fixation in the soil.
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