Effects of Phosphorus-Enriched Biochar on the Growth and Phosphorus (P) Uptake of Iceberg Lettuce

Authors : Hüseyin Eren Korkmaz, Mehmet Akgün, Kürşat Korkmaz

Pages : 352-363

Doi:10.54370/ordubtd.1776027

View : 61 | Download : 93

Publication Date : 2025-12-27

Article Type : Research Paper

Abstract :The aim of the present study is to evaluate the effects of phosphorus-enriched biochar on growth and phosphorus uptake of iceberg lettuce (Lactuca sativa L.). Hazelnut husk biochar (FZB) was combined with triple superphosphate (TSP) and KH₂PO₄ as phosphorus sources and applied at four different rates of 0, 3, 6, and 12 kg P₂O₅ da⁻¹ in a randomized block design with three replications. Analysis of variance revealed significant effects of phosphorus source, application rate, and their interaction on plant dry matter and phosphorus uptake, with a significance level of p<0.05. Lettuce treated with KH₂PO₄⁻ enriched biochar showed a dose-dependent increase in dry matter, reaching 44.7 g per plant at the highest application rate of 12 kg P₂O₅ da⁻¹, corresponding to approximately 80% higher than the control. P uptake also increased substantially under KH₂PO₄ treatments, attaining a maximum of 154.7 mg plant⁻¹, while TSP-enriched biochar resulted in only modest increases in dry matter and phosphorus uptake, reaching 28.2 g per plant and 82.7 mg plant⁻¹, respectively. These findings suggest that biochar acts as an effective carrier for phosphorus fertilizers, enhancing nutrient use efficiency and improving crop performance. Overall, KH₂PO₄-enriched biochar shows strong potential to increase phosphorus availability, stimulate biomass production, and support sustainable fertilization strategies in vegetable cultivation.
Keywords : biyokömür, organik atıklar, P’lu gübreleme, P kullanım etkinliği

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