| Title | UTILIZATION OF LOW-TEMPERATURE GEOTHERMAL WATERS HEAT FOR PROTECTED CROP PRODUCTION |
|---|---|
| Authors | Czes?awa ROSIK-DULEWSKA, Mariusz GRABDA |
| Year | 2001 |
| Conference | Geothermal Energy in Underground Mines, Ustron, Poland |
| Keywords | agricultural |
| Abstract | Relatively abundant resources of low-temperature geothermal and mining waters, which can be found in Poland, represent a large potential for direct application for heating purposes e.g. in horticulture. A number of studies were carried out on the utilization of heat from geothermal waters for intensive vegetable cultivation in foil tunnels in Banska Nizna, near Zakopane, Poland. Heating system in the foil tunnels was placed in the substrate and was the final element of a cascade utilization of geothermal waters' energy. The temperature of water used for heating was 35 - 45 0C. It allowed extending the vegetation period and expedited the growth and yield of the cultivated vegetables. Two soil heating options were investigated in the experiment: standard and a closer spacing heating grid. Based on the obtained results it was stated that a closer spacing of the heating grid facilitates yielding of fore- and after- crop vegetables. In the case of main crop, higher yield was typical for vegetables cultivated on substrate with standard spacing heating grid. |