RESPONSE OF TRITICALE TO MINERAL AND ORGANIC FERTILIZATION AND LIMING ON PSEUDOGLEY SOIL

The tests were performed on the property of the Agricultural and Chemical School "Doktor Đorđe Radić" in Kraljevo, on pseudogley soil. A trial involving the triticale cultivar Trijumf was conducted during two growing seasons (2015/16 and 2016/17), to evaluate the effect of different variants of mineral nutrients with lower and higher doses of phosphorus tested, as well as combinations of the same with lime and manure on productive characteristics of winter triticale. The soil on which the experiment was conducted is characterized by a low pH value (pH <5.0). The tests showed a significant variation in the productive characteristics of the tested fertilization variants. The highest 1000-grain mass and test weight in all fertilization variants were in the first vegetation period with moderate temperatures at the time of grain filling and a large amount of precipitation. Applying the combination of mineral nutrients with lime and manure led to a significant increase in 1000-grain mass and test weight of triticale compared to control. The highest average two-year 1000-grain mass and test weight of winter triticale was achieved with variant T5 fertilized with 120 kg/ha N, 100 kg/ha P2O5, 60 kg/ha K2O, with 5 t/ha CaCO3 and 20 t/ha manure (40.52 g; 73.94 kg/hl). An increase in test weight was markedly higher in the treatment involving liming and manure than in that with an increased rate of P fertilizer, mostly due to P immobilization in the highly acid environment. Analysis of variance revealed a highly significant effect of the growing season on the test weight and a highly significant effect of fertilization on 1000-grain mass was determined. In regions where liming is economically acceptable, this operation should be used to grow triticale on very acid soils to increase pH above the suboptimal level (pH 5.0), thereby fulfilling its grain yield potential.