SAFRILLISA, KARINA (2022) ANALISIS KANDUNGAN NITRAT DAN FOSFAT SUBSTRAT MANGROVE DI DESA SAMBIROTO DAN KEBOROMO, KECAMATAN TAYU, KABUPATEN PATI(22ik435). Undergraduate thesis, Universitas Diponegoro.

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Abstract

RINGKASAN
Karina Safrillisa. 26040118130153. Analisis Kandungan Nitrat dan Fosfat
Substrat Mangrove di Desa Sambiroto dan Keboromo, Kecamatan Tayu,
Kabupaten Pati (Rudhi Pribadi dan Adi Santoso)
Mangrove merupakan tanaman pepohonan atau komunitas vegetasi pantai
tropis yang disebut sebagai ekosistem unik karena lokasinya di daerah pasang
surut air laut. Daerah ekosistem mangrove Desa Sambiroto dan Desa Keboromo
yang terletak di Kabupaten Pati telah digunakan untuk berbagai aktivitas seperti
tempat pariwisata hutan mangrove, area pertambakan, serta penangkapan biota
perairan. Adanya aktivitas tersebut diduga akan memberikan dampak negatif
berupa pencemaran yang menyebabkan turunnya kualitas lingkungan mangrove.
Penurunan kualitas lingkungan diduga akan berpengaruh pada distribusi nitrat dan
fosfat serta pada pertumbuhan mangrove.
Tujuan dari penelitian ini yaitu : menghitung kandungan nitrat dan fosfat
pada substrat mangrove di Desa Sambiroto dan Keboromo serta mengetahui
korelais antara nitrat dan fosfat pada substrat mangrove dengan kerapatan
mangrove di Desa Sambiroto dan Keboromo, Kecamatan Tayu, Kabupaten Pati.
Metode yang digunakan pada penentuan stasiun yaitu metode purposive sampling.
Pengambilan sampel substrat menggunakan skop kecil dengan kedalaman kurang
dari 20 cm selanjutnya sampel basah seberat 1 kg dimasukan ke dalam ziplock,
lalu dimasukan ke dalam kantong plastik hitam dan sampel substrat dibawa ke
laboratorium BALINGTAN. Korelasi kandungan nitrat dan fosfat substrat
mangrove dan kerapatan mangrove pada Desa Sambiroto dan Keboromo dihitung
menggunakan korelasi pearson. Parameter kimia dan fisika yang di hitung secara
in situ adalah suhu, pH, dan salinitas perairan.
Hasil kandungan fosfat substrat mangrove di Desa Sambiroto dan Desa
Keboromo berkisar antara 1-5,4 mg/kg dan nitrat 0,9-3,15 mg/kg. Hasil
perhitungan korelasi nitrat dengan kerapatan mangrove yaitu r = 0,915, dan fosfat
dengan kerapatan mangrove yaitu r = -0,0219. Korelasi antara kandungan nitrat
substrat dengan kerapatan mangrove berarti nitrat mempunyai pengaruh yang
besar terhadap kerapatan mangrove, sedangkan korelasi kandungan fosfat substrat
dengan kerapatan mangrove tidak ada pengaruh kandungan fosfat substrat dengan
kerapatan mangrove yang ada pada stasiun penelitian di Desa Sambiroto dan
Keboromo. Hasil rata-rata pengukuran parameter fisika dan kimia perairan
keempat stasiun adalah suhu 26,7
o
C - 29
o
C; pH 6,17 - 7,1; salinitas 27,3 - 39,7 ppt.
Kata Kunci : mangrove, nitrat, fosfat, substrat

SUMMARY
Karina Safrillisa. 26040118130153. Analysis of the Nitrate and Phosphate
Content of Mangrove Substrates in the Villages of Sambiroto and Keboromo,
Districts of Tayu, Pati (Rudhi Pribadi and Adi Santoso)
Mangroves are tree plants or tropical coastal vegetation communities
which are referred to as unique ecosystems because of their location in tidal
areas. The mangrove ecosystem areas of Sambiroto Village and Keboromo
Village located in Pati Regency have been used for various activities such as
mangrove forest tourism, aquaculture areas, and catching aquatic biota. The
existence of these activities is expected to have a negative impact in the form of
pollution which causes a decrease in the quality of the mangrove environment.
The decline in environmental quality is thought to have an effect on the
distribution of nitrate and phosphate as well as on the growth of mangroves.
The aims of this study were to calculate the nitrate and phosphate content
in mangrove substrates in Sambiroto and Keboromo villages and to determine the
correlation between nitrate and phosphate in mangrove substrates and mangrove
density in Sambiroto and Keboromo villages, Tayu sub-district, Pati district. The
method used in determining the station is the purposive sampling method.
Substrate sampling was taken using a small scope with a depth of less than 20 cm,
then a wet sample weighing 1 kg was put into a ziplock, then put into a black
plastic bag and the substrate sample was taken to the BALINGTAN laboratory.
Correlation of nitrate and phosphate content of mangrove substrate and
mangrove density in Sambiroto and Keboromo villages was calculated using
Pearson correlation. Chemical and physical parameters calculated in situ are
temperature, pH, and salinity of the waters.
The results of the phosphate content of mangrove substrates in Sambiroto
Village and Keboromo Village ranged from 1-5.4 mg/kg and nitrate 0.9-3.15
mg/kg. The results of the calculation of the correlation between nitrate and
mangrove density are r = 0.915, and phosphate with mangrove density are r = -0.0219. The correlation between substrate nitrate content and mangrove density
means that nitrate has a large effect on mangrove density, while the correlation
between substrate phosphate content and mangrove density has no effect on
substrate phosphate content and mangrove density at research stations in
Sambiroto and Keboromo villages. The results of the average measurement of the
physical and chemical parameters of the waters of the four stations are the
temperature of 26.7oC - 29oC; pH 6.17 - 7.1; salinity 27.3 - 39.7 ppt.
Keywords: Mangrove, Nitrate, Phosphate, Substrate

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