Potato Phosphorus Response in Soils with High Value of Phosphorus

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(R2 = 0.38). Sites with soil pH values R2 = 0.76). The P application rate of 56 kg P ha−1 was the best at sites with a soil pH −1 was the best at sites with soil pH ≥ 6.

Keywords

• <i>Solanum tuberosum</i> L.
• total potato yield
• soil pH
• potato marketable yield