Abstract
The purpose of this study was to determine the effect of differences in cutting length and concentration of ZPT coconut water on the growth of dragon fruit seedlings and the interaction between the two treatments. This study used a factorial randomized block design (RAK) consisting of two factors, namely: cutting length factor (P) which consisted of 4 levels, namely P1 = 30cm, P2 = 35cm, P3 = 40cm, and P4 = 45 cm. The ZPT concentration factor of coconut water (K) consists of 3 levels, namely: K1 = 250 ml / liter of distilled water, K2 = 500 ml / liter of distilled water, and K3 = 750 ml / liter of distilled water. Parameters observed were: shoot emergence time, shoot length at 30, 45, and 60 DAP, number of shoots at 30, 45, and 60 DAP, shoot weight, root length, and root weight. The difference in cutting length had a very significant effect on the time of shoot emergence and shoot length at 30 DAP, and significantly on the number of shoots at 30 and 60 DAP. No significant effect on the number of shoots at 30 DAP, root length, shoot weight and root weight. The best observation results were obtained at treatment P1 (30 cm). The concentration of PGR of coconut water had a very significant effect on shoot length at 30 DAP, significantly affected the parameters of time of emergence, shoot length of shoots 60 DAP, number of shoots 45, 60 DAP and had no significant effect on parameters of shoot length 45 DAP, number of shoots 30 DAP, root length, shoot weight, and root weight. The best combination was obtained in the P1K3 treatment (cutting length 30 cm and coconut water ZPT concentration 750 ml/liter aquadest).