The influence of water stress on photosynthetic activity and productivity of potato varieties

The article comparatively studied the photosynthetic activity, productivity and structural elements of the produced product of various potato varieties in the mountainous and foothill irrigated areas of the Ganja-Gazakh region. As a result of the research, it was determined that the dynamics of accumulation of biological mass, productivity and structural elements of the product in different variety samples - the number and average weight of tubers on the root of a plant - differ depending on their biological characteristics and water regime. It was also found that in plants cultivated in mountainous and foothill conditions, many physiological and biochemical processes weaken due to water shortage, and as a result, the growth and development of plants slow down, which leads to a decrease in the biological mass and productivity of plants. These decreases are significantly higher in the Dutch variety Monolyza than in the local varieties Sevinj and Amiri – 600 (42.7%), that is, this variety is more drought-resistant. During the study, the highest yield in the irrigated area was recorded in the Dutch variety Monolyza.