THE INFLUENCE OF INTRODUCING ORGANIC NUTRIENTS AND GROWTH STIMULANT INTO THE SOIL IN DIFFERENT PERIODS ON THE GROWTH, DEVELOPMENT AND FORMATION OF POTATO TUBERS IN ARID CONDITIONS OF THE FOOTHILL ZONE

Abstract

In post-forest, pebbly, carbonated, medium strength, brown soils of the foothill zone, where the annual rainfall is 531 mm (of which 111 mm falls in May and 13 mm in December), the humus content in the soil ranges from 3,5 to 4,5%, the average annual temperature is 11,8⁰ C, under dry conditions, the effect of introducing equivalent amounts of organo-mineral fertilizers and growth-promoting bio-liquid into the soil at different times on the growth, development, transition periods of phenological stages, intensity of potato tuber formation and yield of early potatoes was investigated. Experimental research has revealed the high efficiency of using a relatively small fractional amount of organomix (from sow and in the form of nutrition), and the full amount of bio-liquid in the form of soaking the planting material (3 days before planting), the same or more amount of one-time use, as well as equivalent amounts of mineral fertilizers accepted in the zone compared to the application.