Kajian Ekosistem Mangrove Hasil Rehabilitasi pada Berbagai Tahun Tanam untuk Estimasi Kandungan Ekstrak Tanin di Pantai Utara Jawa Tengah
Abstract: The research was
conducted in the mangrove plantation areas of Pemalang and Rembang North
coasts. From those two areas, mangrove vegetations with the same three
plantation ages were chosen which were then divided into three zones from the
sea. Tree density, height and diameter, the depth of sediment, water salinity
and the content of organic matter were measured and assessed for each mangrove
zones and plantation ages. In order to estimate the content of tannin extract
of a mangrove tree, three mangrove trees of each plantation age were taken as
samples. The wood of the trees were then peeled off, measured the weight and
taken to the laboratory to analyze their tannin extract content. The content of
tannin extract of the whole mangrove areas was obtained by multiplying the
average of tannin extract content per tree with the vegetation density of those
two mangrove areas. Varians analysis was employed to find out the significant
different of the density three plantation ages of two mangrove rehabilitation
areas. The results showed that for plantation years of 2002, the tannin extract
content at both mangrove plantation areas of Pemalang and Rembang in averages
was estimated to have a higher amount than those of plantation year 2003 and
2006. Respectively, the tannin extract content of plantation year of 2002 in
Pemalang and Rembang were estimated to have 105.93 kg/ha and 159.23 kg/ha
tannin extract. Mangrove vegetation with plantation year of 2006 in Pemalang
contained 80.90 kg/ha, while for Rembang is 146.36 kg/ha.
Keywords: Mangrove, ecosystem,
tannin extract
Penulis: Erny Poedjirahajoe,
Ragil Widyorini, Ni Putu Diana Mahayani
Kode Jurnal: jpkehutanandd110010
