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    Effect of the forecast air temperature change on the water needs of vines in the region of Bydgoszcz, Northern Poland
    (2022) Jagosz, Barbara; Rolbiecki, Stanislaw; Rolbiecki, Roman; Ptach, Wieslaw; Sadan, Hicran Asmin; Kasperska-Wolowicz, Wieslawa; Pal-Fam, Ferenc; Atılgan, Atılgan
    The climatic changes observed in Poland are manifested by an increase in air temperature, but not an increase in rainfall, which causes an increase in the water needs of plants, and hence the necessity to develop irrigation systems for crops. The aim of this study was to assess the water needs of grapevines in 2021-2050 in the Bydgoszcz region (northern Poland), an area with high requirements for supplementary irrigation. The calculations were based on the expected changes in air temperature according to the climate change scenario for Poland: the 4th Intergovernmental Panel on Climate Change-Special Report on Emissions Scenarios: balanced scenario (A1B). The average monthly temperature in 1981-2010 was used in the calculations. The water needs of grapevines were estimated using the reference evapotranspiration calculated using the Blaney-Criddle equation, and then using the crop coefficient and potential (crop) evapotranspiration. It was found that in 2021-2050, the water needs of grapevines, both during the growing season (May-September) and during the irrigation period (June-August), will increase by 6%. The highest and significant increase in water needs, by 10%, should be expected in August. The estimated increase in water needs of grapevines indicates the need to development sustainable irrigation systems for vineyards in northern Poland.
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    Sustainable Water Management of Drip-Irrigated Asparagus under Conditions of Central Poland: Evapotranspiration, Water Needs and Rainfall Deficits
    (Mdpi, 2024) Rolbiecki, Stanislaw; Rolbiecki, Roman; Sadan, Hicran A.; Jagosz, Barbara; Kasperska-Wolowicz, Wieslawa; Kanecka-Geszke, Ewa; Pal-Fam, Ferenc
    Water is a valuable yet scarce resource in agriculture. Optimizing crop production relies on irrigation, but within the framework of sustainable agriculture, efforts should prioritize reducing irrigation water usage. Unfortunately, climate change increases plant water requirements, consequently heightening the need for irrigation. The aim of the research was to estimate the water needs of asparagus during the fern growth period (21 June-31 August) using the Blaney-Criddle method. The study also aimed to determine trends in changing water needs and estimate precipitation deficits. Calculations were carried out for the years 1981-2020 across four provinces in central Poland. The research indicated that water needs varied between 233 mm and 242 mm, depending on the province. Over the forty-year period, all provinces displayed an increasing trend in water needs, with a rise of 3.1 mm to 6.2 mm per decade. Between 21 June and 31 August, rainfall deficits occurred with varying intensity in all provinces during normal, medium dry and very dry years. The values of water needs and rainfall deficit, calculated as a result of the research, are of key importance in the design, construction, and management of drip irrigation systems for asparagus plantations in central Poland.