Influence of potassium fertilisation on the leaf phenolic compounds in sweet potato (Ipomoea batatas L.) (CROSBI ID 178037)
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Podaci o odgovornosti
Radojčić Redovniković, Ivana ; Bogović, Mara ; Belko, Dubravko ; Delonga, Karmela ; Fabek, Sanja ; Novak, Bruno ; Toth, Nina
engleski
Influence of potassium fertilisation on the leaf phenolic compounds in sweet potato (Ipomoea batatas L.)
The nutritional value of the sweet potato leaves has recently been emphasised as their anti-oxidant and phenolic compounds can offer improved human health and nutritional benefits. This has increased the awareness of the food industry and consumers in using sweet potato greens as a functional food. To increase the level of phenolic compounds in sweet potato leaves, we studied the influence of potassium (K) fertilisation at different N-K ratios [1:1 (control), 1:2.5, or 1:5] on the phenolic content and corresponding anti-oxidant activity of two different cultivars of sweet potato, ‘Bat1’and ‘Boniato’. In general, enhanced K fertilisation increased the level of phenolic compounds and the corresponding anti-oxidant activity. However, the two cultivars differed in their response. Phenolic acids were only increased in ‘Bat1’ after the application at N:K ratio of 1:5 (approx. 20% ), while enhanced K fertilisation at all rates increased the flavonoid content of both cultivars (approx. 300% ). Our results could be useful for sweet potato producers wishing to make informed decisions on which cultivar and/or mineral fertilizer regime to choose in order to produce sweet potato leaves of the desired nutritional quality.
flavonoids; mineral fertilization; phenolic acids; potassium; sweet potato
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Podaci o izdanju
Povezanost rada
Poljoprivreda (agronomija), Biotehnologija