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All Journal Tropical Plantation Journal
Supriyono Supriyono
Department of Agrotechnology, Faculty of Agriculture, Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry

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Effect of Dolomite and NPK on The Growth and Yield of off-Season Shallots Iswahyudi Iswahyudi; Eddy Tri Haryanto; Supriyono Supriyono; Fitrotunnisa Al-batul; Samanhudi Samanhudi; Erni Irawati; Muji Rahayu; Edi Purwanto
Tropical Plantation Journal Vol 5, No 1 (2026): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v5i1.74

Abstract

Shallot is a high-value horticultural commodity. Its productivity often declines due to suboptimal soil conditions, such as low pH and imbalanced nutrient availability, especially when cultivated off-season. This study aimed to determine the optimal combination of dolomite and NPK (Nitrogen, Phosphorus, Potassium) fertilizer for the growth and yield of shallot cultivated in the off-season. The research was conducted in Ngringo Village, Jaten District, Karanganyar Regency from February-April 2025. The method used was a factorial Completely Randomized Design (CRD) with two factors and three replications. The first factor was dolomite doses (0; 2000; and 4000 kg.ha-1) and NPK fertilizer doses (250; 375; and 500 kg.ha-1). Observed parameters were plant height, number of leaves, fresh and dry biomass weight, fresh and dry bulb weight, number of bulbs per plant, and bulb diameter. Data were analyzed by analysis of variance (ANOVA) at a 95% significance level and continued with Duncan’s Multiple Range Test (DMRT) with 95% significance level when significant differences were found. The results showed no significant interaction between dolomite and NPK fertilizer on shallot growth and yield. Dolomite at 2000 kg.ha-1 significantly increased the number of leaves, while NPK fertilizer had no significant effect. However, 250 kg.ha-1 of NPK fertilizer produced similar results to higher doses, indicating potential fertilizer efficiency. Environmental conditions such as high humidity and low light intensity likely influenced treatment effectiveness.
Co-Authors Ahmad Ichsan Yunanto Ahmad Nurcahyo Amalia Dita Riyaningsih Anggun Anggun Bambang Pujiasmanto Dewi Auliya Ulva Eddy Tri Haryanto Edi Purwanto Eko Murniyanto Erni Irawati Evi Oktanika Fitrotunnisa Al-batul Iswahyudi Iswahyudi Jaka Suyana Jauhari Syamsiyah Jenni Tri Utami Latif Munawar Mth Sri Budiastuti Muhammad Bogi Oktafani Nanik Puji Lestariningsih Pardono Pardono Purwanto Purwanto Rahayu Rahayu Rahayu, Ria Muji Rahmawati Fitria Retno Bandriyati Arni Putri Riska Wijayanti Samanhudi Samanhudi Sri Nyoto Sudadi Sudadi Sumarno Sumarno Suwarto Suwarto Trijono Djoko Sulistyo