Influence of Mineral Nutrition Level and Trace Elements on the Formation of Spring Wheat Yield
Issues associated with meeting the nutrition needs of plants, as well as clarifying optimal doses and methods of administration of trace elements within the soil remain to be highly relevant. This study was aimed at determining an integrated effect of microelements and mineral fertilisers on the yield of spring wheat crops. Experiments were performed on loamy grey forest soils in 2016-2018 in the Republic of Tatarstan. The field research involved the investigation of two factors: mineral fertilisers (factor A) - without fertilisers (control); estimated dose for the planned grain yield of 3 t/ha (N61P55K55); estimated dose for the planned yield of 4 t/ha (N120P126K97); seed treatment before sowing (factor B) - without treatment (control); fungicide Dospeh 3, KS (1.5 l / t); MikromakA, B preparation (2 l / t); fungicide Dospeh 3, KS (1.5 l / t) + Mikromak solution A, B (2 l / t). For the purposes of the research, the Yoldyz spring wheat variety was sown. The resulting average yield of this spring wheat was 1.38 t/ha over three years when grown without the use of fertilisers. During the research period, the introduction of NpK elements at doses calculated for 3 t/ha and 4 t/ha provided an increase in the wheat yield of 1.06 t/ha and 1.56 t/ha, respectively. The treatment of seeds with the Dospeh 3 fungicide and the Mikromak A, B preparation led to an increase in the yield of 0.20 t/ha on unfertilized soil in comparison with 0.27 and 0.40 t/ha on fertilized soil. The use of the Mikromak A, B preparation and the fungicide allowed 1 kg of the active substance of mineral fertilisers to be applied for growing 5.13-6.73 kg of grain.