Pengaruh Konsentrasi Zat Pengatur Tumbuh NAA dan Jenis Pupuk Organik Terhadap Hasil Tanaman Serai Wangi (Cymbopogon nardus L.)

Abstract

Effect of Concentration of Growth Regulating Substances NAA and Types of Organic Fertilizer on Yield of Citronella (Cymbopogon nardus L.)

Citronella is widely used in the therapeutic scrub and aromatherapy industry, especially in the Province of Bali. The aromatic oil produced from the citronella plant is used for incense or aromatic candles. The purpose of the study was to determine the effect of growth regulators NAA (Naphthalene acetic acid) and types of organic fertilizers on the yield of citronella plants. The treatment used consisted of two factors: the concentration of the NAA auxin hormone with the concentration of A₀ = 0 ppm, A₁ = 10 ppm, and A₂ = 20 ppm as the first factor. The second factor is the type of fertilizer P₀ = soil, P₁= vermicompost 50 g and P₂ = 100 g fertilizer goat manure. The results showed the interaction between the concentration of auxin NAA with the type of organic fertilizer significantly affected the number of leaves, number of tillers, and the roots fresh weight. Combination treatment A₁P₂ (10 ppm NAA and 100 g fertilizer goat manure) showed the highest leaf number (64.07), the highest number of tillers (11.29) and the highest fresh weight of roots (44.17 g), compared with A₂P₁ and A₁P₀ with the lowest values ??of 7.16, 41.47, and 25.4 g, respectively. NAA auxin treatment singly significant effect on leaf area and fresh weight leaf. NAA concentration of 10 ppm (A₁) provides the highest leaf area (70.09 cm²) and fresh root weight (47.77 g), compared to control (A₀) with the lowest value of 65.85 cm² and 33.38 g. Organic fertilizer treatment significantly affected the fresh weight total and dry weight total. Fertilizer goat manure 100 g (P₂) produce a total crop fresh weight of 147.57 g and dry weight of 64.28 g, compared to treatment with P₀ and P₁ with the lowest values 108.43 g and 49.99 g, respectively.