Plant and Soil Science

The influence of modern different on the ripeness varieties of potato plants, the terms of planting and the depth of tubers wrapping on the intensity of photosynthesis of potato plants in separate phases of development in the conditions of the Right Bank Forest-steppe of Ukraine have been studied. Experimental studies have found that the intensity of photosynthesis of potato depends on many factors, primarily on the phase of ontogenesis, humidity and changes in ambient temperature. Among the varieties of different ripeness groups, the highest rates were obtained from the first time of planting (23-25.04) in the Dar variety from the budding stage at the depth of 2-3 ml - 22.3 mg of CO2 per 1 hour on 1 dm2 of leaf surface, at the depth of wrapping tubers 6-8 cm - 22.7 and depths 10-12 cm - 23.4 mg CO2 per 1 hour on 1 dm2 of leaf surface, that is, plants show basically medium and sufficient ability to assimilate CO2. The dynamics of the intensity of photosynthesis during ontogenesis showed its growth up to the phase of budding-flowering with the subsequent decrease in the phase of the beginning of the tops fading, which is due to the aging of plants, the yellowing and dying of the lower leaves.

potatoes, varieties, terms of planting, depth of tubers wrapping, intensity of photosynthesis