Abstract
An experiment conducted over 4 years showed that in order to obtain specified levels of productivity of durum wheat varieties, pre-sowing treatment of seed material with new types of biofertilizers should be used. At the same time, the indicators of photosynthetic activity exceed the values of the corresponding indicators of the control variants. As a result, with lower costs for their acquisition when using biofertilizer Gumi 20, the yield of spring wheat increases to 2.85 t/ha (variety Donskaya Elegiya), and for winter durum wheat to 4.16 t/ha (variety Aksinit) . Based on the experimental materials obtained, conclusions were formulated about the mechanism for obtaining specified yield thresholds for durum wheat varieties belonging to the spring and winter types.
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