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Basket willow (Salix viminalis L.) is one of so-called energy crops, which are used to renewable energy source. In conducted research rated effects of deficiency and excess of phosphorus and potassium on selected physiological traits of two willow genotypes: ‘Bjor’ and ‘Tora’ in hydroponics. The purpose of the study was to select genotype which is more resistant to disturbed trophic relationships in the environment. To full Hoagland medium (control sample) added 20% and 40% phosphorus and potassium and also reduced the content of these elements by 20% and 40%. A number of shoots produced by plants, the length the shoots, yield of the fresh and dry mass of the aboveground and root systems and water balance of both examined willows were determined. The results indicated that the ‘Tora’ and ‘Bjor’ are similarly resistant to variable nutritional conditions by phosphorus and potassium.

folia pomeranae universitatis technologiae stetinensis. agricultura, alimentaria, piscaria et zootechnica

EFFECTS OF DEFICIENCY AND EXCESS OF PHOSPHORUS AND POTASSIUM IN HYDROPONICS ON SELECTED PHYSIOLOGICAL AND BIOMETRICAL TRAITS OF BASKET WILLOW (Salix viminalis L.)