ASSESSMENT OF THE SALT RESISTANCE OF FIELD CULTURES

Abstract

A new method for assessing the salt tolerance of agricultural plants has been developed. As a criterion of stability, it is proposed to use the degree of accumulation of the amino acid of proline in 10-day-old seedlings grown in a thermostat at a temperature of 25-28°C on a saturated 0.5-molar solution of sodium chloride multilayer filter paper, followed by subtraction of the coefficients of stability, which are expressed by the ratio of the concentration of amino acids in seedlings grown on saline to control solution. In this case, three groups of plants are distinguished: highly resistant to salinization (salt tolerance coefficient 3.0 and higher); medium-resistant (2.0-2.9); weakly resistant (1.9 and below). The group of highly resistant to salinization includes: sunflower, barley, sugar beet, la, triticale, mustard, rye; to the group of moderately resistant - rice, oats, millet, corn; poorly tolerant - peas, winter wheat, beans, bo, flax, sorghum, lupine, buckwheat, soy. The new method allows us to promptly and objectively assess the salt resistance of species, varieties and breeding lines of field crops.