Photosynthetic potential of hybrids of sugar beet of different life-forms at changeover of moisture accumulation

Abstract

Purpose. To study the dynamics of photosynthetic activity of sugar beet plants of different breeding origin, depending on the humidity regime, and to find out the relationship between the magnitude of photosynthetic potential of plants and the formation of dry matter by the aboveground part and root crops. Methods. Laboratory, vegetative, statistical. The hybrids of Uladovsky One-Dairy 35, Ukrainian SS 70, Extra, Roberta and KV Zbruch were studied on the background of 3 modes of moisture supply of 45, 60 and 75% of the soil moisture. Results The dynamics of the intensity of photosynthetic activity during the growing season and the accumulation of dry matter by plants of varieties and hybrids of sugar beets of various biological forms are examined, depending on the modes of moisture provision. Conclusions The periods of formation of the maximum photosynthetic potential in sugar beet plants of domestic, foreign and joint selections for different moisture content have been established. Correlation between the p otosynthetic potential of sugar beets of different biological forms and the content of dry matter in the leaves of plants is revealed. Ja2 = 0,8059.