109(2)_str 16

ISSN 1392-3196 / e-ISSN 2335-8947
Zemdirbyste-Agriculture, vol. 109, No. 2 (2022), p. 123–13
DOI 10.13080/z-a.2022.109.016

Features of photosynthetic activity and water consumption of safflower



Safflower is a heat-loving and very drought-resistant short-day plant that could be well adapted to dry climate conditions. The aim of the experiment was to establish the influence of mineral fertilisers and growth regulators on the leaf surface area, net photosynthesis productivity, and safflower yield in the conditions of the Southern Steppe of Ukraine. The three-factorial experiment was conducted between 2017 and 2019. The soil of the experimental site was ordinary medium-strength and low-humus chernozem. For the experiment, the following factors were selected: (Carthamus tinctorius L.) cultivars (factor A) ‘Zhyvchyk’ and ‘Dobrynya’; application of mineral fertilisers (factor B): without fertilisers (control), N60P50 for main tillage, and P50 for main tillage + N60 before sowing (P50 + N60); application of growth regulators (factor C): without growth regulators (control), growth regulators Rost-koncentrat + Chelatin oil, Chelatin forte + Chelatin mono boron, Chelatin mono boron + Chelatin phosphorus-potassium, and Chelatin phosphorus-potassium + Chelatin multimix + Chelatin mono boron. The experimental data revealed that with the increase in total water consumption and net photosynthesis productivity the yield of each cultivar increased in direct proportion. The yield of ‘Zhyvchyk’ was higher than that of ‘Dobrynya’.

Keywords: Carthamus tinctorius, mineral fertilisers, leaf surface area, growth regulators, total net photosynthesis productivity.

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