Plant Soil Environ., 2023, 69(2):55-61 | DOI: 10.17221/422/2022-PSE

The effect of drip irrigation for potatoes on soil nitrogen dynamicsOriginal Paper

Milan Čížek1, Andrea Svobodová2, Jiří Zámečník1, Pavel Kasal1, Daniel Vejchar3
1 Potato Research Institute Havlíčkův Brod, Havlíčkův Brod, Czech Republic
2 Crop Research Institute, Prague 6 – Ruzyně, Czech Republic
3 Research Institute of Agricultural Engineering, Prague, Czech Republic

The effects of potato drip irrigation on soil nitrogen dynamics and potato yield was studied in small-plot field trials. The trials were evaluated at during three experimental times seasons (2016-2018). Four variants of irrigation were determined, ie non-irrigated, 60, 65 and 70 ASWC (Available Soil Water Capacity). At the same time, two pre-planting fertilization dates were set at a maximum of 120 kg N/ha a in divided i.e. 60 kg N/ha before planting and 60 kg N/ha by fertigation during vegetation. Pre-planting crop fertilization or in-season fertigation did not have any significant effect on the potato yields of most variants. In all studied parameters, the positive beneficial effect of irrigation was recorded and compared to the non-irrigated control. The mitigation of drought stress in plants during the growing season is the most important advantage of irrigation. In the trials, on average across all years and varieties, the yield of the irrigated variant increased by 41 % compared to the non-irrigated variant. Maintaining optimal soil moisture has a favourable effect use of applied fertilizers. The highest mineral nitrogen content in the soil was recorded for the variant without irrigation. Considering the increased use of nitrogen fertilizers, the subsurface drip line appeared to be optimal for the creation of suitable conditions for nitrogen availability to plants in the root zone.

Keywords: Solanum tuberosum L.; irrigation frequency; split application; C, N ratio

Received: November 30, 2022; Accepted: January 20, 2023; Prepublished online: February 10, 2023; Published: February 26, 2023  Show citation

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Čížek M, Svobodová A, Zámečník J, Kasal P, Vejchar D. The effect of drip irrigation for potatoes on soil nitrogen dynamics. Plant Soil Environ. 2023;69(2):55-61. doi: 10.17221/422/2022-PSE.
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