SULISTYO, FEBRYADI FAJAR (0202) KANDUNGAN NITRAT DAN FOSFAT SEDIMEN SERTA KETERKAITANNYA DENGAN KERAPATAN MANGROVE DI KAWASAN DESA PASAR BANGGI DAN DESA TIREMAN, KABUPATEN REMBANG, JAWA TENGAH (22ik162). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Febryadi Fajar Sulistyo. 26020115120051. Kandungan Nitrat Dan Fosfat
Sedimen Serta Keterkaitannya Dengan Kerapatan Mangrove Di Kawasan Desa
Pasar Banggi Dan Desa Tireman, Kabupaten Rembang, Jawa Tengah (Raden
Ario dan Sri Sedjati).
Hutan mangrove merupakan suatu ekosistem laut yang memiliki peran
dalam hal penyedia nutrien bagi organisme di sekitarnya. Perairan di sekitar
mangrove merupakan area yang kaya nutrien baik organik ataupun anorganik.
Nutrien memiliki peran penting dalam menentukan kemampuan tanah untuk
mendukung tanaman. Nitrat dan fosfat merupakan unsur yang berpengaruh
terhadap pertumbuhan mangrove karena unsur tersebut yang dapat diserap oleh
mangrove untuk dimanfaatkan unsur nitrogen dan fosfor. Tujuan penelitian ini
untuk mengetahui kandungan nitrat dan fosfat yang terdapat pada sedimen di
setiap kerapatan mangrove yang berbeda di Desa Pasar Banggi dan Desa Tireman,
Rembang.
Pengambilan sampel dilakukan pada tanggal 26 Juni – 2 Juli 2018 di 2
lokasi dan 6 stasiun, yaitu Lokasi Pasar Banggi yang terdiri dari Stasiun PB I, PB
II, PB III dan Lokasi Tireman yang terdiri dari Stasiun TR I, TR II, TR III.
Pengambilan data vegetasi dilakukan dengan metode purposive sampling dan
setiap plot dibuat plot sampling. Setiap plot sampling digunakan untuk mengambil
data vegetasi dan substrat mangrove. Setiap individu tree (pohon) (plot 10 m x 10
m) dan sapling (anakan) (subplot 5 m x 5 m) diidentifikasi dan diukur
diameternya setinggi dada (± 1,3 m). Sementara seedling (semai) dihitung jumlah
masing-masing spesies dan persentase penutupannya (subplot 1 m x 1 m). Data
nitrat dan fosfat didapat dari hasil uji kandungan nitrat dan fosfat di Laboratorium
Balai Pengujian dan Peralatan Provinsi Jawa Tengah.
Hasil dari penelitian ini didapatkan nilai kerapatan mangrove di Desa
Pasar Banggi dan Desa Tireman untuk kategori pohon (tree) sebesar 2695 ind/ha,
kategori anakan (sapling) sebesar 489 ind/ha dan kategori semai (seedling)
sebesar 33333 ind/ha. Kandungan nitrat sedimen di Desa Pasar Banggi dan Desa
Tireman berkisar pada 0,15 – 3,06 mg/L. Kandungan fosfat sedimen di Desa
Pasar Banggi dan Desa Tireman berkisar pada ≤0,0006 - 0,74 mg/L. Keterkaitan
kandungan nitrat sedimen dengan kerapatan mangrove di Desa Pasar Banggi dan
Desa Tireman adalah sebesar 43,68% dan 12,86% yang berarti nitrat sedimen
cukup berpengaruh terhadap kerapatan mangrove di Desa Pasar Banggi dan Desa
Tireman. Keterkaitan kandungan fosfat sedimen dengan kerapatan mangrove di
Desa Pasar Banggi dan Desa Tireman adalah sebesar 0,93% dan 19,14% yang
berarti fosfat sedimen memiliki sedikit pengaruh terhadap kerapatan mangrove di
Desa Pasar Banggi dan Desa Tireman.
Kata Kunci:Nitrat, Fosfat, Kerapatan Mangrove, Sedimen

ABSTRACT
Febryadi Fajar Sulistyo. 26020115120051. Nitrate And Phosphate
Content of Sediment and Their Relationship With Mangrove Density In The Area
of Pasar Banggi Village And Tireman Village, Rembang Regency, Central Java
(Raden Ario dan Sri Sedjati).
Mangrove forest is a marine ecosystem that has a role in providing
nutrients for the surrounding organisms. The waters around the mangroves areas
are rich of nutrients, both organic and inorganic. Nutrients have an important
role in determining the ability of the soil to support plants. Nitrates and
phosphates are elements that affect mangrove growth by reason of these elements
can be absorbed by mangroves to be utilized by nitrogen and phosphorus
elements. The purpose of this study is to determine the nitrate and phosphate
content in the sediment at different mangrove densities in Pasar Banggi Village
and Tireman Village, Rembang.
Sampling was carried out on June 26 – July 2 2018 at 2 locations and 6
stations, namely the Banggi Market Location consisting of PB I, PB II, PB III
Stations and the Tireman Location consisting of TR I, TR II, TR III Stations.
Vegetation data was collected by purposive sampling method and each plot was
made a sampling plot. Each sampling plot is used to collect data on vegetation
and mangrove substrates. Each individual tree (plot 10 m x 10 m) and sapling
(sapling) (subplot 5 m x 5 m) was identified and the diameter measured at breast
height (± 1.3 m). Meanwhile, the number of seedlings was calculated for each
species and the percentage of its cover (subplot 1 m x 1 m). The nitrate and
phosphate data were obtained from the results of the nitrate and phosphate
content test at the Central Java Province Testing and Equipment Laboratory.
The results of this study showed that the mangrove density value in Pasar
Banggi Village and Tireman Village for the tree category was 2695 ind/ha, the
sapling category was 489 ind/ha and the seedling category was 33333 ind/ha. The
nitrate content of sediments in Pasar Banggi Village and Tireman Village ranged
from 0.15 to 3.06 mg/L. The phosphate content of sediments in Pasar Banggi
Village and Tireman Village ranged from ≤0.0006 - 0.74 mg/L. The correlation
between sediment nitrate content and mangrove density in Pasar Banggi Village
and Tireman Village is 43.68% and 12.86%, which means that sediment
nitrate has quite an effect on mangrove density in Pasar Banggi Village and
Tireman Village. The correlation between sediment phosphate content and
mangrove density in Pasar Banggi Village and Tireman Village is 0.93% and
19.14%, which means that sedimentary phosphate has little effect on mangrove
density in Pasar Banggi Village and Tireman Village.
Keywords: Nitrate, Phosphate, Mangrove Density, Sediment

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