Potato Phosphorus Response in Soils with High Value of Phosphorus

Ahmed Jasim, Lakesh K. Sharma, Ahmed Zaeen, Sukhwinder K. Bali, Aaron Buzza and Andrei Alyokhin
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Ahmed Jasim: Department of Ecology and Environmental Sciences, University of Maine, Orono, ME 04469, USA
Lakesh K. Sharma: Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA
Ahmed Zaeen: Department of Ecology and Environmental Sciences, University of Maine, Orono, ME 04469, USA
Sukhwinder K. Bali: Deparetment of Agroecology, University of Florida, Gainesville, FL 32611, USA
Aaron Buzza: Aroostook Research Station, University of Maine, Presque Isle, ME 04769, USA
Andrei Alyokhin: Department of Biology, University of Maine, Orono, ME 04469, USA

Agriculture, 2020, vol. 10, issue 7, 1-14

Abstract: Phosphorus (P) is an element that is potatoes require in large amounts. Soil pH is a crucial factor impacting phosphorus availability in potato production. This study was conducted to evaluate the influence of P application rates on the P efficiency for tuber yield, specific gravity, and P uptake. Additionally, the relationship between soil pH and total potato tuber yield was determined. Six rates of P fertilization (0–280 kg P ha −1 ) were applied at twelve different sites across Northern Maine. Yield parameters were not responsive to P application rates. However, regression analysis showed that soil pH was significantly correlated with total potato tuber yield( R 2 = 0.38). Sites with soil pH values < 6 had total tuber yields, marketable tuber yields, tuber numbers per plant, and total tuber mean weights that were all higher than these same parameters at sites with soil pH ≥ 6. All sites with soil pH< 6 showed a highly correlated relationship between P uptake and petiole dry weight ( R 2 = 0.76). The P application rate of 56 kg P ha −1 was the best at sites with a soil pH < 6, but 0–56 kg P ha −1 was the best at sites with soil pH ≥ 6.

Keywords: Solanum tuberosum L.; total potato yield; soil pH; potato marketable yield (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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