Effect of Irrigation by Diluted Sea Water and Antioxidants on Growth of Cotton Plants

IN A GREENHOUSE in the National Research Centre, a pot experiment was carried out to study the influences of irrigation by diluted sea water and antioxidants on growth of cotton plants. The treatments of salinity were irrigation by diluted sea water with 3.91 and 7.82 dS/m and by fresh water as a control. Thiamine, tryptophan and fresh water were sprayed twice at 45 and 60 days age. A split plot design was used. Nine traits were studied. Salinity decreases in growth parameters. In most cases, the higher salinity resulted in the higher depression. For antioxidants, tryptophan showed the highest values on plant height, number of leaves/ plant and fresh weight of stem, leaves/plant and whole plant without wide differences with those of thiamine treatments. Application of thiamine and tryptophan improved the area of leaves /plant. Dry weight of stem leaves and top dry weight were improved with amino acid or vitamin. Tryptophan was more effective than thiamine. It may be recommended the use of tryptophan when irrigation by diluted sea water ranging between 3.91 and 7.82 dS/m