[Effect of increasing salinity at different ratios of K to Na as chloride on germination and growth of two barley varieties differing in salt resistance]
1989
Kassray, R. | Doering, H.W.
The behaviour of the two barley varieties Aramir and Diva to increasing salinity in root sphere was studied in short-term experiments under controlled conditions. Treatments consisted in three concentration levels of 25, 50 and 100 meg/1 kcal and NaCl resp. and two ratios of K to Na 9:1 and 1:9 at each level. The germination of the two varieties varied with salt concentration and it was lower for Aramir than for Diva at all treatments. Salt concentrations in the nutrient solution higher than 25 meq/1 with the ratio 1:9 of K to Na reduced growth and dry matter yield of both varieties. Changes in the appearance of plants were observed as chlorosis and toxicity symptoms as necrosis of the tip of the leaves. The resistance of both varieties to increase of salinity as KCl was higher than NaCl. In general Aramir was more resistant to the increase in NaCl while Diva could obviously better tolerate increasing KCl concentration. Considering the response of both varieties in terms of maximum biomass production to the different levels of salt concentration expressed as EC evidently the two varieties have a degree of salt resistance as to tolerate a medium to strong salinity referring to the practiced growth conditions
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