Wpływ zmian klimatu na efektywność wykorzystywania azotu oraz jego straty

The aim of the study was to determine the expected yields, the efficiency of N (NUE) use, N leaching, N2O and NH3 emissions depending on climate change until 2050. The research was carried out using the DNDC model for the years 1991-2010, 2011-2030 and 2031-2050 as well as 10 locations in Poland. In the simulations, the crop rotation were considered: maize for grain - spring barley - winter rape - winter wheat, which was grown on light, medium and heavy soils, with fertilization of, respectively: 140, 90, 160 and 120 kg N ha-1. It was found that climate change can contribute to increase in the yield of maize (6-43%) and winter rape (2-8%), decreases in winter wheat yield (from -18 to -5%) and negligible changes in yields of spring barley. NUE will increase in the cultivation of maize (2-17%), it will decrease in winter wheat (3-22%) and spring barley (3-17%) crops and will not change in the case of winter oilseed rape. NUE changes and N losses did not affect the need to reduce nitrogen doses in the future cultivation of the studied plants.