Potato nutritional status at the onset of tuberisation - a yield prediction tool

Karolina Frąckowiak, Jarosław Potarzycki, Witold Grzebisz and Witold Szczepaniak
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Karolina Frąckowiak: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland
Jarosław Potarzycki: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland
Witold Grzebisz: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland
Witold Szczepaniak: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland

Plant, Soil and Environment, 2020, vol. 66, issue 2, 86-92

Abstract: A reliable tuber yield prognosis requires a complex statistical analysis of potato nutritional status in the fully developed 4th leaf at the onset of tuberisation. This hypothesis was validated in the series of field experiments conducted in 2006-2008 in Poland. The experimental design was composed of two nitrogen (N) rates (60, 120 kg/ha), two N fertilisers (Urea and Agrotain), two rates of sulfur (0, 50 kg/ha). The marketable tuber yield of cv. Zeus ranged from 31.3 to 59.3 t/ha in 2008 and 2006, respectively. Despite annual variability, the potato presented a good nutritional status. In 2008, the contents of N, Mg, Cu and Zn were about 33% lower as compared to 2006. The stepwise and path analyses indicated N, Mg and Cu as the key yield-limiting nutrients. The diagnosis and recommendation integrated system (DRIS) showed that a slight imbalance of N and Mg did not disturb tuber yield, provided a positive balance of K was maintained. The Mg index, as a result of the DRIS procedure, emerged as the best single predictor of potato yield.

Keywords: Solanum tuberosum L.; leaves; macronutrient; micronutrient; nutrient status diagnosis (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:66:y:2020:i:2:id:533-2019-pse

DOI: 10.17221/533/2019-PSE

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