The aim of the study was to compare the water requirements and the precipitation deficiencies during cultivation of asparagus in the period from June to August in the regions of Bydgoszcz and Wroclaw. The water needs were calculated using the plant coefficient. The reference evapotranspiration was measured by Grabarczyk's method (1976). The coefficients kc, determined for the Polish conditions by Rolbiecki (2013), were used to estimate the water requirements considered as the crop evapotranspiration. In the studied period (from June to August, 1996-2015), higher water requirements of asparagus were noted in the Wroclaw region (366.1 mm) than in the Bydgoszcz region (288.5 mm). The monthly water needs in June, July and August were 69.8 mm, 128.8 mm and 167.5 mm, respectively, in the Wroclaw region, and 55.5 mm, 98.5 mm and 134.5 mm, respectively, in the Bydgoszcz region. In July, the tendency to increase the water requirements in both observed regions was noted. The monthly crop evapotranspiration in July rose in each decade by 12.3 mm in the Bydgoszcz region and by 21.2 mm in the Wroclaw region. In the 20-year study, the rainfall deficit in June and July during 11-13 years was noted. In August, the precipitation deficiencies were ...
The aim of the study was to attempt to estimate the demand for water for raspberry grown in the Chojnice county depending on expected climate changes. The study takes into account two scenarios (RCP 4.5 and RCP 8.5) for the period 2021-2100. It was found that in the reference period, the total rainfall deficits during the raspberry growing season in the Chojnice county - in the average, moderately dry and very dry years - amounted 48 mm, 141 mm and 208 mm, respectively. The largest monthly rainfall deficit during the raspberry growing season of the reference period occurred in July. The amount of rainfall deficit - in the average, moderately dry and very dry year - was on the level 16 mm, 42 mm and 59 mm, respectively. In the forecast period (2021-2100), the largest monthly rainfall deficits during the raspberry growing season will also occur in July. These rainfall deficits under the RCP 4.5 scenario - in a medium, moderately dry and very dry year - will amount 25 mm, 52 mm and 70 mm, respectively. In the light of the RCP 8.5 scenario, rainfall deficits in July will be even higher and may amount to 27 mm, 55 ...
The aim of the study was to attempt to estimate the demand for water for strawberry grown in the Chojnice county depending on expected climate changes. The study takes into account two scenarios (RCP 4.5 and RCP 8.5) for the period 2021-2100. It was found that in the reference period, the total rainfall deficits during the strawberry growing season in the Chojnice county - in the average, moderately dry and very dry years - amounted 31 mm, 127 mm and 192 mm, respectively. The largest monthly rainfall deficit during the strawberry growing season of the reference period occurred in June. The amount of rainfall deficit - in the average, moderately dry and very dry year - was on the level 19 mm, 39 mm and 53 mm, respectively. In the forecast period (2021-2100), the largest monthly rainfall deficits during the strawberry growing season will occur in July. These rainfall deficits under the RCP 4.5 scenario - in a medium, moderately dry and very dry year - will amount 15 mm, 40 mm and 58 mm, respectively. In the light of the RCP 8.5 scenario, rainfall deficits in July will be even higher and may amount to 17 mm, 43 mm ...
