CD Skripsi
Analisis Kandungan Nitrat, Fosfat Dan Silikat Serta Pengaruhnya Terhadap Kelimpahan Diatom Planktonik Di Perairan Muara Sungai Batang Arau Kota Padang Provinsi Sumatera Barat
The entry of nutrients (nitrate, phosphate and silicate) from land-based
antrophogenic activities (industry, agriculture and household waste) through
rivers can potentially cause changes in water quality and will affect fertility and
aquatic organisms such as phytoplankton. These three nutrients play an important
role in the living tissue cells of living organisms and in the photosynthesis
process.This study aims to analyze the effect of nitrate, phosphate and silicate
content on the plankton abundance in the estuary of the Batang Arau River,
Padang, West Sumatra. The method used is a survey method, the determination of
the sampling station is done by purposive sampling, data were analysed by Excel
and SPSS Software. Based on the results of laboratory analysis, the nitrate content
ranged from 0.117 to 0.485 mg/l, phosphate content from 0.239 to 0.704 mg/l, and
silicate content from 0.031 to 0.685 mg/l. Planktonic diatom abundance in the
estuary of the Batang Arau River ranges from 194 to 750 ind/l. The results of the
statistical analysis of the effect of nitrate, phosphate and silicate with abundance
of diatoms are expressed by the equation Y = 743.019Constanta – 481.828Nitrate –
199.552Phosphate - 172.971Silicate. This equation explains that the effect of nitrate,
phosphate and silicate content on diatom abundance has an inverse or negative
relationship, where nitrate, phosphate and silicate levels increase, the diatom
abundance will decrease. The difference of content and the relationship between
parameters analyzed in this research is discussed.
Keyword: Nitrate, Phosphate, Silicate, Diatom, West Sumatera
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