Zinc Amelioration Effects on Tomato Growth and Production under Saline WaterIrrigation Conditions

摘要

Two pots experiments were carried out in the summer seasons of 2010 and 2011 to examine the effect of some zinc – EDTA (13%) treatments to alleviate the harmful effects of saline water irrigation on tomato (Lycopersicon esculentum) hybrid Super Strain B. Salinity levels were 2000, 3000 and 4000 ppm, meanwhile Zn – EDTA (13%) treatments were 0 (control), 0.35 and 0.52 g / pot (0, 2 and 3 kg / fed.). Irrigation of tomato plants by the lowest level of salinity (2000 ppm) increased plant height, fresh weight of aerial parts, leaf area, total chlorophyll content, NPK in tomato leaves, fruit setting, and total yield. On the contrary, saline water irrigation at 3000 and 4000 ppm decreased all the previous characters, but increased leaves dry matter percentage. On the other hand, Zn – EDTA at the rate of 0.35 g/pot led to the highest plant height, fresh weight of aerial parts, leaf area, total chlorophyll content, NPK in leaves, fruit setting, and total yield, while the control treatment gave the lowest values for all the previous characters. The interaction between salinity levels and zinc treatments gave the greatest values of plant height, fresh weight of aerial parts, total chlorophyll content, NPK in tomato leaves, fruit setting and total yield by Zn – EDTA at the rate of 0.35 g/pot combined with 2000 ppm saline water, while the least values of the previous characters were produced by the interaction between control treatment (zero g/pot) and salinity level of 4000 ppm.