Yield, uptake and allocation of NPK in potatoes depending on fertilization

The yield, uptake of nutritional elements from the soil and their content, and allocation in potato plant parts depending on fertilization were studied.
The field experiment was carried out in a mountainous region of Bulgaria.
The experiment included the treatments: control (not fertilized), N, P, K, NP, NK, PK, NPK, NPKMg.
The treatments which included fertilization with nitrogen and potassium increased the content of both elements in main plant parts (roots, aboveground biomass and tubers). Phosphorus application increased mainly the content of the element in roots and tubers in comparison with treatments without this nutrient element.
The highest amounts of nutrients removed from the soil were allocated in tubers, (up to 88% for N, 92% for P and 85% for K), followed by above-ground biomass and roots.
The combined NPK fertilization ensured the highest yield average for the three years – 24.51 t ha^‑1, followed by a double fertilizer combination with included nitrogen (NK t ha^‑1 15 and NP 18 t ha^‑1) and single ones (around 10.5 t ha^‑1).

VIII South-Eastern Europe Symposium on Vegetables and Potatoes

I. Manolov, N. Neshev

potatoes, content of nitrogen, phosphorus, and potassium, allocation of nutrients in plant

https://doi.org/10.17660/ActaHortic.2021.1320.29