| Summary: | Merapi eruption that occurred in October 2010 have led to the death and
destruction of existing vegetation, around 3000 hectares of national park area
experienced serious impacts. Beside the vegetation damage, around 150 million
m
3
eruption materials covered the land national parks with varying thickness.
Post-eruption restoration have been done in order to restore forest conditions both
habitat and biodiversity. One of the activities carried out by the construction of
restoration demonstration plots. Planting was done by applying technology of
organic potpress to overcome the constraints thickness of volcanic ash. This study
aims to determine the growth of puspa, salam, and gayam plantation, the effect of
using organic potpress technology and the interaction between species with
treatment given.
This research was carried out using Incompletely Block Design so the sample
unit for each species can be different. Measurements were conducted on three
species of plants such as puspa, salam and gayam with plant spacing used was 4 x
5 m. The variables measured were survival percentage, plant height and stem
diameter. The analysis of T-test of data was using Microsoft Excel program, to
determine the effect of using of organic potpres on growth of plant and interaction
between species.
The result showed that the survival percentage of all species was 57,97%.
Salam has superior growth because its adaptability is fairly high to the survival of
67,85%, the added average height to the treatment without organic potpres was
6,51 cm, 0,24 cm added diameter, while the added average treatment organic
potpres 4,34 cm and average diameter of 0,25 cm. Puspa had a survival rate of
60,23%, with an added average height at treatment without organic potpres 8,60
cm with an average diameter of 0,23 cm, while the treatment potpres 4,28 cm
added in height and the average diameter 0,24 cm. Survival rates of gayam
45,83% with the added average height on treatment without organic potpres 6,31
cm and diameter 0,23 cm, average added height with potpres 4,16 cm and average
diameter 0,25 cm. Plants without organic potpress treatment having a better high
growth, mean while plants that use organic potpress has a better diameter growth.
Organic potpres treatment was given significant to added height to the three
species but not significant to added diameter, therefore it is necessary to do further
study.
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