The effect of microbiological and mineral fertilizers on the productivity of fodder crop rotation and the fertility of sod-podzolic soil

Abstract

Relevance. For the first time, new biofertilizers Azotovite and Phosphatovite in combination with mineral and organic fertilizers were studied on sod-podzolic soil (83% of the arable area) in the conditions of the Novgorod region in the fodder crop rotation. The study of the influence of the methods of using microbiological fertilizers together with mineral and organic fertilizers in the developed crop rotation is relevant.Methods. Studies for 2019–2022 in the fodder crop rotation according to the 2 × 4 scheme were carried out on sod-podzolic soil underlain by clays. We studied three methods of using Azotovite (A) and Phosphatovite (F) — (factor B) on two backgrounds of complete mineral fertilizer (factor A), affecting the yield and nutritional value of crops in crop rotation.Results. Application in technological operations (twice) azotovite and phosphatovite (pickling of seed material at 2 l/t and non-root spraying in the phases of plant formation at a height of up to 30 cm, 1 l/ha of each preparation) together with mineral fertilizers for the estimated yield ensured the productivity of the phytomass of the vico-oat mixture of 35 t/ha with high nutritional value: collection of dry matter (SV) — 11.0 t/ha, digestible protein — 0.83 t/ha, exchange energy — 32.0 GJ/ha. The use of this technology provided for the rotation of crop rotation high nutritional value of feed from 1 ha of digestible protein — 0.45 t, exchange energy — 33.0 GJ, SV — 5.3 t with a low energy intensity of production thousand tons of units 2.6 GJ and an increase in the energy potential of the soil for crop rotation by more than 35 GJ/ha.