Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2
Written by Zhivko TODOROV
To determine the changes in the physiological parameters, a field experiment was implemented by plot method, repeated 4 times, with the size of the experimental plot of 20 m2 . The study was conducted in the area of the Training, Experimental and Implementation Base of the Plant Growing Department at the Agricultural University - Plovdiv. The purpose of this study is to provide data on the physiological parameters of winter oil-bearing rapeseed sown at different sowing times, treated with several foliar fertilizers. To achieve this, the following parameters were monitored: net photosynthesis rate (A), transpiration intensity (E), and stomata conductance (gs) determined by the portable photosynthetic system LCA-4 (Analytical Development Company Ltd., Hoddesdon, England). From the results obtained, it can be seen that the high values of net photosynthesis combined with moderate to high levels of transpiration in the tested variants were reported in the variants treated with Fertiactyl Starter.
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