ACCUMULATION AND USE OF K2O BY SPRING WHEAT AND WINTER RYE ON SOUTH CHERNOZEMS OF THE ORENBURG PREDURALYE IN THE SPRING-SUMMER PERIOD
The article is aimed at studying the accumulation and removal of one of the important nutrients of potassium plants (K2O) by sowing spring hard wheat and winter rye in the spring-summer period on southern black soil under conditions of the Orenburg Urals. The aim of the study was to study the effect of precursors and fertilizer on the potassium content in the soil under the crops of agricultural crops. crops (winter rye and spring durum wheat) in the spring-summer period. The objects of research are spring durum wheat according to various predecessors and winter rye on the black rocker pair. Research on the topic was carried out for a long time (18 years). The studied cultures underwent three rotations of six-field crop rotations. The data obtained indicate an advantage in the accumulation of K2O with the use of mineral fertilizers. By the time harvested durum wheat and winter rye, the difference in potassium content between fertilized and unwholed background is reduced. Winter rye crops contribute to an increase in potassium reserves in the soil on two nutritional backgrounds. In the permanent cultivation of spring durum wheat, there is a lower (relative to other experience options) potassium content in the soil.