The effectiveness of mineral fertilizers and feeding of early spring grain crops with AgroVerm in the drought conditions of the Orenburg Preduralye
The study was carried out in 2019 on a long-term stationary experiment to study field crop rotations and permanent crops of agricultural crops according to the accepted state methods. In the experiment, mineral fertilizers and feeding of early spring grain crops were studied on two nutritional backgrounds in two-field crop rotations and permanent crops of agricultural crops. As a result of the strongest spring-summer drought in 2019, the yield of spring durum wheat for all its predecessors and nutritional backgrounds with top dressing averaged 3.3 to 5.8 centners per hectare, of spring soft wheat - from 5.5 to 6,6 centners and barley - up to 10.4 centners per hectare. The effect of the use of mineral fertilizers and top dressing of spring durum wheat was not observed for all predecessors. For spring soft wheat, the increase in grain from the fertilized background was up to 1.9 centners, for barley - up to 6.5 centners per hectare. Top dressing of spring soft wheat on both feeding backgrounds also turned out to be ineffective, and barley on a fertilized background reduced the yield to 4.3 centners per hectare. As a result of the study on the effectiveness of mineral fertilizers and feeding of early spring grain crops in two-field crop rotations and permanent crops, it was found that there is a decrease in yield due to severe aridity during the growing season, especially in the crops of spring durum wheat. The low yield from the action of fertilizing with AgroVerm biofertilizer is explained by the fact that the manufacturer unreasonably recommends this drug as a growth stimulator for agricultural crops without testing and verification in arid regions of Russia, including the Orenburg region.