Ecology, Environment and Conservation Paper

PHOTOSYNTHETIC PRODUCTIVITY OF POTATO PLANTS DEPENDING ON THE LOCATION OF ROWS PLACEMENT IN AGROPHYTOCENOSIS

Mazur V.A., Myalkovsky R.O., Pantsyreva H.V., Didur I.M., Mazur K.V. and Alekseev O.O.

Abstract

The article presents the results of research on the influence of row placement from West to East and from North to South on the photosynthetic activity of potato plants in the conditions of the Right-Bank Forest Steppe of Ukraine. The field research (for 2011-2017 years) was conducted on the experimental field training and production center «Podillya» of Podilsky State Agrarian Technical University that was sown with potato, which is located within the city Kamyanets-Podilsky, Khmelnytsky region. It was established that the largest area of leaf surface of potato varieties was provided by rows from the West to the East in the second period - flowering – the cessation of stalk growth in the Malyns’kabila (middle) varieties - 31.4 thousand m-2 ha, Nadiyna (middle ripe) –30.7 thousand m-2 ha and Dar (average) - 31.4 thousand m-2 ha. From the direction of the rows from North to South, this indicator was slightly smaller and was in the above mentioned varieties: respectively 28,1; 27.4 and 29.7 thousand m-2 ha. The highest indices of photosynthetic potential were also observed during flowering – termination of stems growth in the direction of rows from West to East and amounted to 1.9 million m-2 ha in the middle-early varieties of Malyns’kabila and Legenda, while the average-ripening ones wereVira and Nadiyna– 1.8 million m-2 ha and average late Oksamyt– 1.7 million m-2 ha. In the direction of rows from North to South, the highest value of photosynthetic potential was observed in the above mentioned varieties. With the further growth and development of potato plants inthe period when the stems stop growth- dying, photosynthetic potential indicators decrease. It should also be noted that the maximum net productivity of photosynthesis in plants of potato varieties was observed in the second period - flowering-termination of growth of stems from the direction of rows from West to East in the middle-early varieties was 7.6 g m-2 day - Legenda, middle-aged 8.1 g m-2 day - Slovyaca and late-mature 7.5 g m-2 day - Oksamyt.