Abstract:
This study aimed to analyze the effect of inundation height with and without empty fruit
bunches of palm oil (EFBPO) and dolomite lime on the growth of seedlings of swamp
jelutung (Dyera polyphilla). The factors studied were factor A (inundation height) which
consisted of the height of the polybag, the middle height between the tip of the polybag
and the seedling shoot, and the height of the seedling shoot. Factor B consisted of peat
swamp water without EFBPO and dolomite lime, peat swamp water with EFBPO, and
peat swamp water with dolomite lime. The analytical method used was the MannWhitney U test to see the effect between each treatment. The results showed that the
treatment of giving dolomite lime to peat swamp water could increase the height
increment of jelutung seedlings at all levels of inundation, but the effect was not
significant. This treatment could also significantly increase the survival percentage of
jelutung seedlings, especially at deeper inundation heights, namely in inundation as
high as the polybag height and as high as shoots of seedlings. The treatment of
inundation height had a very significant effect on the increase in seedling height, where
the higher the inundation, the higher the increase in the height of jelutung seedlings, but
the survival percentage was decreasing. However, the decrease in the survival
percentage could be reduced by applying dolomite lime to peat swamp water. In the
present study, it is recommended to apply dolomite lime to the peat swamp water, while
the use of EFBPO is not recommended unless there is an innovation to add oxygen to
peat swamp water.
Keywords: Growth increment, Jelutung, Inundation, Empty fruit bunches of palm oil,
Dolomite lime
