تأثير الملوحة على المسطح الورقي و المادة الجافة لصنفين من القطن السوري (G.hirsutum.L.)‎

الملخص EN

This research was carried out during the 2004 – 2005 growing season in the farm of the Faculty of Agriculture, Tishreen Univ.

Lattakia, Syria, to study the effect of 4 salt concentrations 0.0, 0.1%, 0.2%, 0.3%, 0.4%.

on the leaf area and dry mater of two Syrian cotton varieties, namely Aleppo 133 and Raka 5, using split plot design with 12 replicates.

The salt was a mixture of NaCl, MgCl2, and MgSO4.

The results showed the following: - The use of Saline concentration from 0.2% to 0.4% significantly decreased leaf area /plant, shoot and root dry weight g/plant for both varieties, during growth stages, begging budding, flowering, and open boll stages ( 45 ,70 and 120 days after planting) respectively, compared with the control.

The comparison among mean concentrations was significant.

- The root dry weight of both varieties was less reduced under saline than shoot dry weight during the all growth stages.

- The variety Raka 5 exhibited greater tolerance, and gave better values of leaf area and weight dry matter, at all concentrations.