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Rugayah Rugayah
Jurusan Agronomi dan Hortikultura Fakultas Pertanian Universitas Lampung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Respons Tanaman Angelonia (Angelonia angustifolia) terhadap Pemberian Paclobutrazol Rugayah Rugayah; Agus Karyanto; Setyo Widagdo; Farida Lukmi
JURNAL AGROTROPIKA Vol 22, No 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.6563

Abstract

Ornamental plants have now developed as souvenirs given at a wedding. Requirements for souvenirs, the plants should be tiny, lush, and have much of flowers. So its growth needs to be modified using a growth regulator paclobutrazol. This study aimed to determine the response of angelonia plants to the application of paclobutrazol at several levels of concentration and determine the concentration of paclobutrazol which has the best appearance of angelonia plants. This research method used a randomized block design (RBD) with treatment of 6 levels of paclobutrazol concentration, namely 0 ppm, 30 ppm, 60 ppm, 90 ppm, 120 ppm and 150 ppm with 3 replications. The F test and further tests were carried out an Orthogonal Polynomials. All tests were carried out at the 5% level. The results showed that the application of paclobutrazol at a concentration level of 30-150 ppm, was effective in suppressing the growth rate of angelonia plants in the vegetative phase. This value was proved by the results of the questionnaire that, the highest visual value was obtained at a concentration of 150 ppm. But with the increasing concentration of paclobutrazol, the freshness of  flowers became shorter. Keywords: Angelonia, Concentration, Paclobutrazol
EFEKTIVITAS JENIS NUTRISI DAN KONSENTRASI PGPR TERHADAP PERTUMBUHAN DAN HASIL SELADA MERAH (Lactuca sativa, L. var. Red Rapid) PADA SISTEM HIDROPONIK RAKIT APUNG Adinda Nur Hasanah; Rugayah Rugayah; Sri Yusnaini; Sri Ramadiana
JURNAL AGROTROPIKA Vol. 25 No. 2 (2026): Jurnal Agrotropika Vol 25 No 2, Oktober 2026
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v25i2.13354

Abstract

Red lettuce (Lactuca sativa L.) is a vegetable with high economic and nutritional value that can be cultivated in hydroponic systems. The success of hydroponic cultivation is influenced by nutrient availability. However, the use of Plant Growth-Promoting Rhizobacteria (PGPR) as a biological stimulant combined with various nutrient sources in hydroponic systems is still not widely used. This study aimed to analyze the effectiveness of nutrient types and PGPR concentrations on the growth and yield of red lettuce grown in a floating raft hydroponic system. The experiment was conducted at the Integrated Field Laboratory Greenhouse, Faculty of Agriculture, University of Lampung, from February to March 2026 was designed as 2 × 4 factorial Randomized Complete Block Design (RCBD) with three replications. The first factor was the type of nutrient used, which included of AB-mix (N1) and Growmore 32-10-10 (N2). The second factor was the concentration of PGPR, which included of 0 mL/L (P0), 8 mL/L (P1), 16 mL/L (P2), and 24 mL/L (P3). The results showed that AB-mix produced higher growth and yield of red lettuce than Growmore 32-10-10 across all observed variables. Each incremental increase in PGPR concentration up to 24 mL/L improved the growth and yield of red lettuce across all observed variables. The interaction between nutrient type and PGPR concentration indicated that AB-mix resulted in greater growth and yield responses than Growmore 32-10-10. In addition, root components (root length, root fresh weight, and root volume) were very strongly correlated with plant fresh weight.
Co-Authors Adinda Nur Hasanah Agus Karyanto Farida Lukmi Setyo Widagdo Sri Ramadiana Sri Yusnaini