FORMATION OF PHOTOSYNTHETIC MACHINE SORT OF CARTOPLES OF DIFFERENT GROWTH GROUP OF DEPENDENCE ON GEOGRAPHICAL DISTRIBUTION OF THE RANGE DIRECTION

Abstract

The article presents the results of studies on the influence of the placing of strings from the West to the East and from the North to the South on the photosynthetic activity of potato plants under the conditions of the Right Bank Foreststeppe of Ukraine. It was established that the largest area of the leaf surface of potato varieties ensured the placement of strings from the West to the East in the second period – the flowering-termination of the growth of stems in Malinskaya White (medium-sized) varieties – 31.4 thousand m2/ha, Nadiyna (middle-aged) – 30.7 thousand m2/ha and Dar (medium late) – 31.4 thousand m2/ ha. From the direction of the strings from North to South, this figure was somewhat lower and was in the above-mentioned varieties: 28.1; 27.4 and 29.7 thousand m2/ha. The highest indexes of photosynthetic potential were also observed during the period of flowering-termination of stem growth in the direction of the strings from the West to the East and was in the middle grades of Malin White and the Legend – 1.9 million m2/ha, the middle-aged – Vira and Nadiyna – 1.8 million. m2/ha and medium-late Oxamite – 1.7 million m2/ha. In the direction of the strings from the North to the South, the highest value of the photosynthetic potential was noted in the above-mentioned varieties. With the subsequent growth and development of potato plants in the period of the beginning of the termination of the growth of stems-dying, the photosynthetic potential decreases along the direction of the lines relative to the finding of the Sun in the zenith. It should also be noted that the maximum values of the net productivity of photosynthesis in plants of potato varieties were marked in the second period – the flowering-termination of the growth of stems from the direction of the strings from the West to the East in the middle grades was 7.6 g/m2/day - Legend, the middle aged 8.1 g m2/day - Slavianka and late-fallen 7.5 g/m2/day – Oxamite.