CROP PRODUCTIVITY UNDER DIATOMITE AFTEREFFECT AND DOUBLE APPLICATION OF POULTRY MANURE

The purpose of the study was to determine the productivity of crops in a grain–fallow–row crop rotation under the residual effect of diatomite and repeated application of poultry manure. Studies have shown that the residual effect of diatomite in combination with the double application of poultry manure to the soil has the greatest influence on the formation of elements of the yield structure of winter wheat, corn, and spring wheat. The article shows that diatomite at rates from 4 to 10 t/ha in the fifth year after its introduction into the soil has no significant influence on the elements of the yield structure of cereal crops such as the number of productive stems, the number of grains in the ear and the weight of 1000 grains. The elements of the yield structure of corn were not significantly affected by the after-effect of diatomite at rates of 4 and 6 t/ha. The maximum productivity of grain–fallow–row crop rotation was achieved by the after-effect of diatomite in combination with repeated application of poultry manure. The productivity of winter wheat in the experimental variants with diatomite and repeated application of poultry manure varied between 4.19 and 4.47 t/ha of grain, of corn between 9.70 and 10.42 t/ha of grain and of spring wheat between 3.13 and 3.41 t/ha of grain.