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 ...
The aim of this study was to estimate the water demand for purple coneflower (Echinacea purpurea L.) on a green roof in Bydgoszcz urban aglomeration, depending on projected climate change. A scenario of climate changes for Poland SRES: A1B was taken into account. Water needs of purple coneflower were determined by the method of plant coefficients. Based on adopted assumptions and performed calculations, it was found that in the forecast period (2021-2050) there will be greater variability in the water needs of the Purple coneflower. In the forecast period, a clear tendency towards increasing water needs of the purple coneflower is expected ( every 8.9 mm in a decade). Total rainfall deficiencies for the entire growing season of the purple coneflower (11. May - 10. July) - in an average, moderately dry and very dry year - are expected to decrease to a minor extent, from 205,9 mm, 259,4 mm and 301,9 mm in the comparative period to 198,6 mm, 254,6 mm and 298,5 mm in the forecast period, respectively (which results from more rainfall in June and July in the scenario of climate changes, which was used.) ...
