Plant Growth, Yield and Quality of Potato Crop in Relation to Potassium Fertilization

The present work evaluated the effect of soil (S) and foliage (F) applied potassium on growth, yield, quality potato plants. Potassium was added in at recommended rate for all treatments combining mineral fertilizers with K-feldspar biofertilizers, while foliar spraying included application citrate (PC), silicate (PS), monopotassium phosphate (MP). obtained results showed that plant height highest following treatment 100% fertilizer under MP, content P, K, total carbohydrates leaves also increased same fertilization treatment. On other hand, values number stems fresh dry weight per plant, as well nitrogen leaves, were after addition PC, regardless growing season. Yield parameters positively affected by combination (100% or 80% K2SO4 + 20% biofertilizer) nitrogen, protein, amino acids, potassium, phosphorus, starch tubers combined MP CP. In conclusion, CP most growth- tuber chemical composition-related parameters. These highlight importance regimes achieving high yields improving a sustainable cost-effective manner.