CD Tesis
Keanekaragaman Dan Kelimpahan Mesofauna Tanah Pada Hutan Sekunder, Agroforestri Kelapa Sawit Dengan Gaharu Dan Kebun Karet Masyarakat Di Kabupaten Kampar
Riau is one of the provinces that has high potential for natural resources,
including forest and plantation areas. The forest area in Riau Province is about ±
5,392,336 Ha, while the area for oil palm plantations is ± 2,537,375 Ha and the
area for rubber plantations is ± 494, 106 Ha (BPS Riau Province, 2019). Forest
and plantation areas require fertile soil to increase productivity. The fertile land
area is strongly influenced by the role and diversity of soil fauna, especially soil
mesofauna. The purpose of this study was to analyze the diversity and abundance
of soil mesofauna in secondary forest, oil palm agroforestry with agarwood and
community rubber plantations in Kampar Regency.
Determination of sample points in secondary forest, oil palm agroforestry
with agarwood and rubber plantations, a sample plot measuring 20 x 20 m was
made with four replications using the zigzag method. In each plot, 3 sampling
points were set in a zigzag manner. The number of soil samples taken at each
location was 12 soil samples, so that the total samples were 36 soil samples. Soil
samples were taken for analysis of soil mesofauna analysis using the Barlese
Tullgren Tullgren funnel method. Soil mesofauna collected in film bottles
containing 70% alcohol, were counted and identified to the family level by
observing morphological characterization. Soil sampling for soil chemical
analysis was carried out at each study site in a composite manner and to calculate
the rate of litter decomposition was carried out using the litterbag method.
The results showed that the diversity index in each location was relatively
the same which was included in the medium category. The highest population
density and relative density were found in oil palm plantations and the frequency
of attendance included accidental/very rare (0 – 25%), accessory types/rare (25 –
50%), constant/frequent (50 – 75%) and absolute/very frequent type (≤75%). The
highest decomposition rate occurred in secondary forest at week 2 of 0.23 ± 0.014
and the lowest was in oil palm agroforestry with agarwood at week 12 of 0.02 ±
0.010.
The conclusion of the research is that population density, relative density,
number of individuals, diversity index and abundance of soil mesofauna in oil
palm agroforestry with agarwood are higher than secondary forest and rubber
plantations, while the frequency of presence of soil mesofauna is absolute,
constant, accessory and accidental.
Key Words : Diversity, Abundance, Mesofauna
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