The paper presents the production effects of irrigation of sugar beet, winter rape, spring barley, soybean and faba bean, obtained in long-term (2005-2020) field experiments. The experiments were carried out on light soil with compact subsoil in the Bydgoszcz area. Significant, rectilinear relationships were found between increases in plant yields under the influence of sprinkler irrigation and precipitation totals in the vegetation periods of these plants, especially in the phases of increased water demand. The average long-term production effects of irrigation of the surveyed crops, which are presented in the work and their variability over the long-term period, may be the basis for assessing the desirability of irrigation of plants in areas of comparable soil and precipitation conditions. ...
The aim of the study was to forecast sugar beet yield increases under the influence of sprinkler irrigation in the Bydgoszcz region, depending on three climate change scenarios. Three climate change scenarios were considered: RCP4.5, RCP8.5, and SRES A1B. Sugar beet root yield increases under the influence of sprinkler irrigation (Q) depending on precipitation during the critical period (PVII-VIII) were determined using the equation Q = 0.356 (241 - PVII-VIII). Calculations were performed for the forecast period (2021-2050), with the 30-year period 1991-2020 as the reference period. The possible yield increases for sugar beet roots over the forecast period (2021-2050) ranged from 34.9 t·ha-1 to 63.0 t·ha-1 in average years, 45.1 t·ha-1 to 67.5 t·ha-1 in moderately dry years, and 50.2 t·ha-1 to 69.8 t·ha-1 in very dry years. From the three climate change scenarios analyzed, higher production effects of sprinkler irrigation on sugar beet are achievable under the SRES A1B model. The presented very high production effects of sprinkler irrigation on sugar beet can become the basis for assessing the economic effectiveness of ...
