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URGING COTTON PLANTS TO OVERCOME THE SALT STRESS CONDITIONS IN THE RECLAIMED LAND USING A COMBINATION OF INNOVATIVE AGRICULTURAL FACTORS

M. Dewdar,M. Rady

Published 2011 in Egyptian Journal of Agricultural Sciences

ABSTRACT

The possibility of inducing cotton plants towards better growth and yielding under reclaimed soil with salinity level of about 7000 ppm was investigated in El-Tahrir Province, El-Behera Governorate, Egypt, during the two successive seasons of 2009 and 2010. For verifying this aim, the plants produced from calcium paste treated-seeds of cotton (seeds covered with the mixture of calcium nitrate, humic acid and wheat bran at the ratio of 1:1:3, respectively by weight) were sprayed with ascorbic acid at the rates of 0 (control), 200, 400 and 600 mgL -1 . Significant positive influences of calcium paste applied solely or in combination with all ascorbic acid applications were observed on growth traits (number of leaf plant -1 , total leaf area plant -1 and dry weight of leaf plant -1 ), chemical constituents (photosynthetic pigments, some photosynthates, some macro-and micronutrients) and yield (seed cotton yield plant -1 and feddan -1 as well as lint%) in comparison with the control (without calcium paste and ascorbic acid). As for ascorbic acid, plants sprayed with all studied rates represented significant increases in all aforementioned parameters with the best results obtained from the rate of 400 mgL -1 as compared with untreated plants. Thereon, it has been recommended that spraying cotton plants (cultivar Giza 90), produced from calcium paste treated-seeds, with 400 mgL -1 ascorbic acid solution may overcome the adverse conditions of reclaimed soils particularly, salinity up to 7000 ppm and consequently, economic yield is obtainable.

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