Leaf area and photosynthetic potential of the sunflower crops depending on the conditions of cultivation
Borysenko V.V., Postgraduate, , Uman National University of Horticulture, Ukraine
Випуск №83. Частина 1
The results of the conducted research prove that in the phase of inflorescence formation – flowering, at the density of plants of 90 thousand plants per hectare and row spacing width of 70 cm.,the average leaf area had higher indices in the early ripened hybrid Zahrava was 80,7, while mid-ripening hybrid Ukrainskyi F1 had 78,0 thousand square meters per hectare in comparison with the density control of 70 thousand square meters per hectare and row spacing width of 70 cm where the leaf area comprised 78,0 and 69,9 thousand square meters per hectare.
Photosynthetic potential of the sunflower in the phase of inflorescence formation – flowering, was also higher with the crops density of 90 thousand per hectare and row spacing width of 70 cm., early ripened hybrid Zahrava comprised 2,7 million square meters per hectare days while mid-ripened hybrid Ukrainskyi F1 had 2,6 mln. square meters/hectare days in comparison with the control, where the density was 70 thousand plants per hectares and row spacing width of 70 cm., photosynthesis potential comprised 2,6 and 2,4 mln. square meters/hectare days, correspondingly.