| dc.description.abstract | One of the problems encountered in the field of rubber stump nursery is
the high percentage of deaths caused of inhibit root and shoot growth. Therefore
to accelerate the growth of roots and shoots can be done by applying growth
regulators, asam asetik naftalen 3,0%. The purpose of this study is to determine
the growth response of rubber stump (Hevea brasiliensis Muell Arg.) against
asetik naftalen acid 3,0% by basting to the cutting wound of taproot on a variety
of growing media composition. The research was conducted in September 2015
until January 2016 at experimental farm of the Faculty of Agriculture, Sumatera
Utara University, Medan. The research design used completely randomized
design with two factors and three replications. The first factor is the concentration
of asam asetik naftalen 3,0% ( 0 mg, 25 mg, 50 mg, 75 mg) and the second factor
is the growing media comparison of top soil and sand (1: 0, 1: 1, 1: 2, 1: 3).
Parameters measured were the percentage germinate, the melentis speed, the shoot
length, the diameter of shoots, the number of leaves, the fresh weight of root, the
root dry weight, the fresh weight of shoot, and the shoot dry weight.
The results showed that the applying of asam asetik naftalen 3,0 % 0 mg,
25 mg, 50 mg, 75 mg, and the planting medium top soil, sand (1: 0), top soil,
sand (1: 1), top soil, sand (1: 2), topsoil, sand (1: 3) and their interaction had no
significant growth in the rubber stump. | en_US |
