THE INFLUENCE OF CROP ROTATION AND MINERAL FERTILIZATION ON WINTER WHEAT CROP YIELD

Abstract

This paper presents the synthesis results obtained for the autumn wheat crop under the influence of mineral fertilization and the preceding plant under the conditions of the Transylvanian plateau during 2018 – 2022. Under different climatic conditions and the preceding plant during five years winter wheat responded differently. The experiments were polyfactorial according to the method of randomized blocks in subdivided plots. Soybeans and corn were the precursors to the winter wheat crop. The mineral fertilization options were fertilizers based on nitrogen (ammonium nitrate) and phosphorus (superphosphate) with 5 graduations each. The doses used were for phosphorus P₀P₄₀P₈₀P₁₂₀P₁₆₀ both for the winter wheat crop cultivated after soybeans and after corn and those of nitrogen N₀N₃₀N₆₀N₉₀N₁₂₀ for the winter wheat crop cultivated after soybeans and N₀N₄₀N₈₀N₁₂₀N₁₆₀ for wheat cultivated after corn. Phosphorus fertilizers were applied in autumn under the ploughing and nitrogen fertilizers half of the dose in autumn and half in spring for both cases. The obtained results were analyzed by known statistical methods, the analysis of variance and the influence between factors.