Plant and crop net photosynthesis productivity increased most intensively from the
end of the intensive leaf growth up till the end of intensive root-crop growth (between
II and III measurements, or 81–90, 109–139 days after sowing). Plant photosynthesis
productivity in comparison with II measurement at the end of July – in the beginning of
August on the average increased 0.62 mg cm-2 in 24 h or 2.2 times, crop photosynthesis
productivity increased 27.6 mg m-2 in 24 h or 1.8 times. The biggest increase of plant
net photosynthesis productivity was applying fertilizer with nitrification inhibitor
(1.17 mg cm-2 in 24 h), and this one of crop’s – applying Cropcare 10 10 20 (29.4 mg m-2
in 24 h). Crop net photosynthesis productivity applying fertilizer with nitrification
inhibitor increased 18.2 mg m-2 in 24 h (Fig. 2)