Pengaruh Konsentrasi Asam Sulfat (H2SO4) dan Diameter Batang terhadap Produktivitas Getah Pinus (Pinus merkusii Jungh et de Vries)

ABSTRACT Pine (Pinus merkusii Jungh et de Vries) is a type of pine that grows native in
Indonesia. The increasing demand for resin to meet industrial needs, the need for
gondorukem and turpentine increased. The problem faced is that the resin that comes out
does not meet Perhutani's target, so it requires stimulants that are safe in the long run and
can make the resin continue to come out without damaging the pine tree. The research is
located at BKPH Kepanjen KPH Malang RPH Gendogo (plot 173A). The study was conducted
in February to April 2019. Increased resin production by administering sulfuric acid solution.
The greater the diameter of the pine trunk the more resin that comes out. The study aims
to determine the effect of sulfuric acid (H2SO4) and stem diameter on the productivity of
pine resin (P. merkusii Jungh et de Vries). The research method was conducted with RAK
(Randomized Group Design) consisting of 2 factors. Factor 1, the concentration of sulfuric
acid solution used were: 0%, 15%, 25%, and 35%. Factor 2, the diameter of the stems
used are: 20-25 cm, 26-30 cm, 31-35 cm, each repeated 3 times so that there are 36
experimental units, each experimental unit there are 5 pine trees. The parameters studied
were the amount of pine tree resin and the quality of pine tree resin produced. Significantly
affected by the treatment, the DMRT test was carried out. The results showed an
interaction between administration of concentrations of sulfuric acid (H2SO4) and stem
diameter to the results of the resin at the 1st collection of quality A resin and collection of
3,4,5 quality of the B resin. The concentration of 35% accelerated the discharge of pine
resin. Stem diameter 31-35 cm in size produces the most quality A and B resin.