Özet:

Background and Aims: Rubber is a principal raw material for industrial products such as tires, health facilities, and home appliances. This research paper focused on seeking the data of maturity acceleration of Hevea brasiliensis. Basically, the firm's growth and uniform immature tree (TBM) was studied to support productivity according to the genetic potential (clones). Mature rubber tree acceleration is an effort to reduce non-productive period. Method: This experiment used five recommended rubber clones, a combination of IAA with Kinetin, and three paclobutrazol concentrations. It applied the growth parameters of several rubber clones by applying growth regulators during the immature tree period. It took a-7 month data collection in the Karang Inong Estate, PTPN-III, East Aceh Regency. The research was arranged in a Nested Design using three factors and two replications that nested in clones. Findings: The obtained data showed that the growth of rubber clones was influenced by plant growth regulators (PGR). Paclobutrazol which applied through roots is more effective to inhibit plant high and girth increase than sprayed through leaves. The highest increase of girth was found in clones PB 330 and IRR 5 with PGR 500 ppm + Kinetin 60 ppm. The application of PGR IAA + Kinetin can accelerate the tapping maturity of each clone; at this design, the girth has a faster process to befall into mature tapping criteria (≥ 45 cm).  Data found that the increase in stem girth did not have a significant difference. The combination of treatments tended to increase in clones PB 330 with IAA 600 ppm + PGR 60 ppm and soil application of paclobutrazol (K2H6P1) (± 49.05 cm) on rubber tree age of 46-month.  Combination of clones, PGR and paclobutrazol (combination of three factors) was not significantly affecting the parameters of girth increased and accelerated maturity under 4 years.

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