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All Journal Caraka Tani: Journal of Sustainable Agriculture Tropical Plantation Journal
Eddy Tri Haryanto, Eddy Tri
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Agriculture, Biological Sciences & Forestry

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OPTIMALISASI KULTUR JARINGAN BAWANG PUTIH DENGAN VARIASI KONSENTRASI EKSTRAK RAGI Putri, Ardyana Hamidani; Haryanto, Eddy Tri; Purnomo, Djoko
Caraka Tani: Journal of Sustainable Agriculture Vol 30, No 1 (2015): March
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.853 KB) | DOI: 10.20961/carakatani.v30i1.11844

Abstract

Garlic potential in Indonesia to be low because the tubers as planting materials have been infected virus. Tissue culture generates plant virus free so the tuber production as healthy planting material. The role of media to the succes of tissue culture is very high. Although the available tissue culture media has nutrients contain, but for the growth of onion plantlets required additional nutrients such as yeast extract. Yeast extract contained enzyme, amino acids and vitamin needed by plant growth. The research aimed to study the effect of yeast extract on garlic plantlet growth in tissue culture. The use of yeast extract in tissue culture with MS medium for garlic explants does not increase the growth plantlet. 
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.
Co-Authors Al-batul, Fitrotunnisa Ardyana Hamidani Putri, Ardyana Hamidani Djoko Purnomo Edi Purwanto Erni Irawati ISWAHYUDI ISWAHYUDI Muji Rahayu Samanhudi Samanhudi Supriyono Supriyono