تلخیص
Effect of soil salinity on growth and ionic composition of three tomato varieties (Monprecus, Pant Bahr and Roma) were investigated with and without addition of K (300 mg kg-' soil) in greenhouse. Plant height and dry matter yield of tomato varieties reduced with increased salinity level. Reduction of dry matter yield was 17.6, 32 and 2 percent over control in Monprecus, Pant Bahr and Roma varieties. Sodium concentration in leaf tissues was increased and K decreased in salinized plants. Roma had relatively more Na (277 mM Kg-') than Monprecus (235 mM Kr') and Pant Bahr (208 mM Kg'') varieties. Application of K enhanced growth, dry matter yield and K concentration in tomato plants and consequently reduced NaIK ratios. Pant Bahr had lower NaIK ratio than Monprecus and Roma indicating that it was more tolerant to salts. Improvement in yield by K application under saline conditions was 65, 57 and 41 percent in Monprecus, Pant Bahr and Roma varieties, respectively.
Muhammad Yasin. (1999) Growth and ionic composition of tomato varieties as effected by salinity levels and supplemental potassium, The Journal Soil & Environment , Volume 17, Issue (3-4).
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