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All Journal Agrosains: Jurnal Penelitian Agronomi Tropical Plantation Journal
Eddy Tri Haryanto, Eddy Tri
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Agriculture, Biological Sciences & Forestry

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Effect of Dolomite and NPK on The Growth and Yield of off-Season Shallots Iswahyudi, Iswahyudi; Haryanto, Eddy Tri; Supriyono, Supriyono; Al-batul, Fitrotunnisa; Samanhudi, Samanhudi; Irawati, Erni; Rahayu, Muji; Purwanto, Edi
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.
The Effect of Growth Regulator Formulation and Boron on The Growth and Yield of Shallot Varieties Harsono, Puji; Putri, Ade Widya; Haryanto, Eddy Tri; Handoyo, Gani Cahyo
Agrosains : Jurnal Penelitian Agronomi Vol 27, No 1 (2025): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v27i1.100603

Abstract

Regulators (PGRs) are used to stimulate the development and growth of bulbs in order to produce a large number of bulbs. This study aims to identify the effect of PGRs and boron formulations that can increase the growth and yield of several variety of shallots. This research took place in the cultivation field of Ngringo Village, Jaten District, Karanganyar Regency from April-August 2023. The method used was a Complete Randomized Blok Design (CRBD) consisting of two factors with four replications. The first factor was PGRs and Boron formulation (without and with GA3 200 ppm+BAP 50 ppm+NAA 50 ppm+ IAA 300 ppm + 1500 ppm boron formulation). The second factor was variety (Bima Brebes, Maja Cipanas, Batu Ijo and Tajuk). Data were analyzed by F test with 95% confidence level followed by Duncan’s Multiple Range Test (DMRT) with 95% confidence level. The results showed that the application of PGRs formulations GA3 200 ppm + BAP 50 ppm + NAA 50 ppm +IAA 300 ppm + 1500 ppm boron on shallots of Tajuk varieties was able to increase number of leaves by 5 leaves and able to increase number of bulbs per clump of 3 bulbs compared to without the aplication of PGRs and boron formulations. The Tajuk variety provides the best growth in fresh weight of 16 g higher stalks and in the yield of fresh weight of bulbs per clump 23 g compared to the Batu Ijo variety. Shallots treated with 200 ppm GA3 + BAP 50 ppm + NAA 50 ppm +IAA 300 ppm + 1500 ppm boron have not shown an increase in growth and yield accros various shallot varieties.
Co-Authors Al-batul, Fitrotunnisa Ardyana Hamidani Putri, Ardyana Hamidani Djoko Purnomo Edi Purwanto Erni Irawati Handoyo, Gani Cahyo ISWAHYUDI ISWAHYUDI Muji Rahayu Puji Harsono, Puji Putri, Ade Widya Samanhudi Samanhudi Supriyono Supriyono