Response of Growth and Potato Tubers Yield to Potassium Fertilization and Some Bio- Extracts
Keywords:Potassium fertilizer, bio extracts, potato cv. Spunta
Two field experiments were carried out at a Private Farm, El-Harsha District, Zawia Region, Libya representing sandy loam soil during the winter seasons of 2020/2021 and 2021/2022 to study the effect of potassium fertilization with some different bio-extracts (dry yeast and seaweeds) on growth, tuber yield and its components and chemical content of leaves and tuber of potato cv. Spunta. The experiment included 8 treatments, i.e. control without any addition, potassium sulphate (100kg/ha), dry yeast extract (5g./L), seaweed extract (5g/L), potassium sulphate (50 kg/ha) + dry yeast extract (2.5 g/L), potassium sulphate (50 kg/ha) + seaweed extract (2.5 g/L), dry yeast extract (2.5 g/L) + seaweed extract (2.5 g/L), and potassium sulphate (50 kg/ha) + ), dry yeast extract (2.5 g/L) + seaweed extract (2.5 g/L).This experiment was arranged in a randomized complete block design(RCBD) with three replications. The obtained results are summarized as follows; The triple treatment of potassium sulphate fertilizer (50 kg/ha) + dry yeast extracts (2.5 g/L) + seaweeds extract (2.5 g/L) gave the heaviest increased vegetative growth, tuber yield and its components, as well as chemical content, carbohydrates, starch, TSS and protein of potato, cv. Spunta.
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