PENGARUH KOMPOSISI LARUTAN PUPUK DAN ZPT TERHADAP INDUKSI PEMBUNGAAN ANGGREK DENDROBIUM (Dendrobium sp.)

The Dendrobium orchid is a type of orchid plant that is very popular with people in Indonesia. Several types of growth regulators used to optimize the growth and development of Dendrobium orchid plants include auxin, cytokinin and gibberellin. The aim of this research is to examine the effect of the correct composition of a solution containing fertilizer and Growth Regulatory Substances (ZPT) on the induction of flowering of Dendrobium orchids. This research was carried out at Mitra Anggrek Indonesia, Junrejo District, Batu City, East Java. The time for this research to be carried out is January to May 2024. Using a Randomized Block Design (RAK) with 1 factor. The combination of fertilizer and ZPT treatment factors abbreviated as (P) consists of P0 (Water), P1 (Compound NPK 2 gr/l), P2 (BA 50 mg/l, GA 50 mg/l, Compound NPK 2 gr/l), P3 (BA 150 mg/l, Paclobutrazol 100 ml/l, Compound NPK 2 gr/l), P4 (Pronas 10 ml/l, Compound NPK 2 g/l). Each combination in the treatment will be dissolved into one solution, so you get 4 solutions, namely solutions P1, P2, P3, and P4. The research results of P3 treatment (Benzyladenine Acid 150 mg/l, Paclobutrazol 100 ml/l, Compound Fertilizer 2 g/l) provided a response to the induction of flowering of Dendrobium orchids with a flowering percentage of 16.6% and P2 treatment with a solution composition (Benzyladenine Acid 50 mg/l, Gibberellin Acid 50 mg/l and Compound Fertilizer 2 g/l) flowering percentage of 8.3%. The composition of the fertilizer solution contained in P1 (2 g/l Compound Fertilizer) at 77 hsp had a significant effect in increasing the average number of Dendrobium orchid roots by 16.00 and was significantly different.