Tuber yield amplification in Dahlia variabilis L. under humic acid and fertilizer combinations

Authors

• KEDAR MAHADEV GHEWARE, Division of Floriculture and Landscaping, Faculty of Horticulture and Forestry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, IndiaFollow
• NOMITA LAISHRAM, Division of Floriculture and Landscaping, Faculty of Horticulture and Forestry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, IndiaFollow
• ARVINDER SINGH, Division of Floriculture and Landscaping, Faculty of Horticulture and Forestry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, IndiaFollow
• SARABDEEP KOUR, Division of Soil Science and Agricultural Chemistry, Faculty of Agriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, IndiaFollow
• SOURAV SHARMA, Division of Floriculture and Landscaping, Faculty of Horticulture and Forestry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, Jammu, IndiaFollow
• AYTAN SAMADOVA, Department of Ecological Chemistry, Faculty of Ecology and Soil Science, Baku State University, Baku, AzerbaijanFollow
• MELEKBER SÜLÜŞOĞLU DURUL, Department of Horticulture, Faculty of Agriculture, Kocaeli University, Kocaeli, TürkiyeFollow
• HALİL İBRAHİM TUZLACI, Atatürk Horticultural Central Research Institute, Ministry of Agriculture and Forestry, Yalova, TürkiyeFollow

Abstract

Dahlia variabilis L. is a valued tuberous ornamental crop grown worldwide for its attractive flowers. Optimizing nutrient management is crucial for maximizing dahlia growth and tuber yield. In this field study, we evaluated the combined effects of humic acid (HA) and chemical fertilizers on the tuber production of Dahlia variabilis L. A factorial randomized complete block design was used with treatments combining three fertilizer levels (100%, 75%, and 50% of recommended NPK dose) and multiple HA treatments. HA was applied as a soil amendment and foliar spray in combination with inorganic NPK fertilizer. Results showed that integrating HA with reduced fertilizer doses enhanced plant growth and tuber yield. The treatment combining 75% of the recommended NPK dose (75–90 75 kg ha–1 NPK) with HA produced significantly greater tuber yield than the full dose of NPK (control). Thus, HA application synergizes with NPK fertilization to amplify dahlia tuber yield, suggesting that sustainable integrated nutrient management can maintain high yield while reducing chemical fertilizer inputs.

Author ORCID Identifier

KEDAR GHEWARE: 0000-0002-0146-8604

NOMITA LAISHRAM: 0000-0002-3475-1190

ARVINDER SINGH: 0009-0003-7505-8258

SARABDEEP KOUR: 0009-0008-2828-5489

SOURAV SHARMA: 0009-0003-7112-5900

AYTAN SAMADOVA: 0009-0008-2758-820X

MELEKBER DURUL: 0000-0002-6546-5891

HALİL TUZLACI: 0000-0002-5658-0302

DOI

10.55730/1300-011X.3491

Keywords

Dahlia, fertilizer, humic acid, sustainable horticulture, tuber yield

First Page

608

Last Page

624

Publisher

The Scientific and Technological Research Council of Türkiye (TÜBİTAK)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

GHEWARE, K. M, LAISHRAM, N, SINGH, A, KOUR, S, SHARMA, S, SAMADOVA, A, DURUL, M. S, & TUZLACI, H. İ (2026). Tuber yield amplification in Dahlia variabilis L. under humic acid and fertilizer combinations. Turkish Journal of Agriculture and Forestry 50 (5): 608-624. https://doi.org/10.55730/1300-011X.3491