The Effect of Number of Nodes and Concentration of Auxin and Shallot Extract on Growth Parameters of Vanilla Cuttings (<i>Vanilla planifolia</i> Andrews)

Abstract Vanilla propagation is generally done using cuttings. Plant Growth Regulators (PGR) are organic compounds that can accelerate or decelerate the growth and development of plants. This study aims to determine the effect of the number of nodes and the concentration of auxin and shallot extract on the roots of vanilla cuttings ( Vanilla planifolia Andrews). This research was conducted in Pesanggaran Village, Pesanggaran Subdistrict, Banyuwangi Regency, from November 2023 to March 2024. The experimental design used in this study was a randomized block design (RBD) consisting of 2 factors and 3 groups. The number of nodes factor consisted of 4 levels: 3 nodes (R1), 4 nodes (R2), 5 nodes (R3), and 6 nodes (R4), while the auxin concentration factor consisted of 5 levels: 25 mg/1.5 Rootone-F (H1), 22 ml shallot extract (H2), 25 mg/1.5 Rootone-F + 22 ml shallot extract (H3), 50 mg/1.5 Rootone-F + 22 ml shallot extract (H4), and 75 mg/1.5 Rootone-F + 22 ml shallot extract (H5). The conclusions drawn from this study are: (1) The interaction between the number of nodes and the concentration of auxin and shallot extract had no significant effect on all observed variables, (2) The treatment of the number of nodes significantly affected the variables of sprout emergence time (R2), nodes emergence time (R1), fresh weight of the shoots and dry weight of the shoots (R3), (3) The concentration of auxin and shallot extract significantly affected the variables of shoot length (H1), stem diameter (H3), time to shoot emergence (H3), plant height (H3) and dry weight of the shoots (H1).