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All Journal Aquacoastmarine Jurnal Serambi Engineering Journal of Sylva Indonesiana
Ternala Alexander Barus
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LAJU PRODUKTIVITAS PRIMER PERAIRAN RAWA KONGSI KECAMATAN PATUMBAK KABUPATEN DELI SERDANG PROVINSI SUMATERA UTARA (The Rate of Aquatic Primary Productivity in Kongsi Swamp Patumbak District of Deli Serdang Regency North Sumatra) Dinarta Pardede; Ternala Alexander Barus; Rusdi Leidonald
AQUACOASTMARINE Vol 4, No 3 (2016): JURNAL AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.503 KB)

Abstract

The Rate of Aquatic Primary Prod uctivity (RAPP) is the formation of organiccompounds from inorganic compounds with the aid of sunlight and chlorophyll. KongsiSwamp is stagnant water system utilized by people for agriculture, livestock, fishingand waste disposal that cause a negative effect. This study aims to know RAPP in RawaKongsi and to know RAPP relationship with chlorophyll-a and physical chemistryparameters of water. The study took place from February until March 2016. Thesampling location choosed by purposive sampling which divided into 4 stations basedon different activities. The analysis were method water quality, chlorophyll-a, primaryproductivity and Pearson correlation. The results of water quality analysis showed thatKongsi swamp was moderately polluted based on the average of DO 2,28 mg/L, thevalue average of aquatic primary productivity Kongsi swamp 487,968 mgC/m3/hari,levels trophic based on the value average of chlorophyll-a 2.461 mg/m3 including thecategory of low fertility (oligotrophic). The correlation between primary productivitywith chlorophyll-a and chemical physics of water in Kongsi Swamp is very strong.Keywords: Aquatic Primary Productivity, Chlorophyl-a, Kongsi Swamp, Water Quality
HUBUNGAN KANDUNGAN NITRAT DAN FOSFAT TERHADAP PERTUMBUHAN BIOMASSA BASAH ECENG GONDOK DI RAWA KONGSI SUMATERA UTARA (Relations Nitrate and Phosphate on The Growth of Hyacinth Wet Biomass in Kongsi Swamp North Sumatra) Yessy Christanty; Ternala Alexander Barus; Desrita Desrita
AQUACOASTMARINE Vol 4, No 3 (2016): JURNAL AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

The rapid growth of water hyacinth and high durability made plant growth is extremely difficult to control. This study aimed to determine the effect of nitrate and phosphate content of the relationship to the gowth of biomass wet hyacinth different locations in the waters Rawa Kongsi during an interval of two weeks. The research was conducted in March to April 2016. Length parameter is water hyacinth plant height, weight parameter consist of fresh weight of water hyacinth, and parameter number consists of the amount of water hyacinth leaves. Water quality parameters measured were dissolved oxygen, pH, temperature, brightness, nitrate and phosphate. The results obtained through the measurement of dissolved oxygen water quality is 1,6 mg/l-4 mg/l, pH is 6,3-6,6, water temperature is 30ºC-32ºC, brightness values is 42-119,5 cm. Nitrate values at Station I, II, and III is 0,25-0,73 mg/l; <0,001-2,09 mg/l; <0,001-2,4 mg/l. Phosphate values at Station I, II, and III is <0,001-0,019 mg/l; <0,001-0,026 mg/l; <0,001-0,032 mg/l. At station III gives better results on the growth of biomass compared to treatment at another location. The highest growth of water hyacinth biomass is found in the observation of the 2nd with biomass wet is 70.6 g and relative growth rate is 3.56% g/day.Keywords : Nitrate, Phosphate, Rawa Kongsi, Water Hyacinth, Wet BiomassGrowth
Estimasi Potensi Produksi Ikan Di Danau Laut Tawar Berdasarkan Morphoedaphic Index Saiful Adhar; Ternala Alexander Barus; Esther Sorta Mauli Nababan; Hesti Wahyuningsih; Erlangga Erlangga; Munawwar Khalil
Jurnal Serambi Engineering Vol 5, No 3 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i3.2144

Abstract

Laut Tawar Lake is located in Aceh Tengah District is the largest lake in Aceh Province. The lake, located at an altitude of 1230 meters above sea level, produces about 13 species of freshwater fish. Fish depik (Rasbora tawarensis), eyas (Rasbora sp.), and relo (Rasbora sp.) are endemic species of Laut Tawar Lake. This study aims to estimate the potential of fish production based on the value of morphoedaphic index. The observation was conducted for one year, from October 2016 until September 2017. The measurement of electric conductivity value of lake waters was conducted on 7 (seven) stations selected purposively in the lake area about 5870 hectares. The results showed that morphoedaphic index value of Laut Tawar Lake ranged from 5.10 to 7.84 with an average of 6.14. Potential of fish production in the lake is 33.47 kg/ha/yr with total potential of fish production of 196.49 ton/yr. The value shows a decrease of 10.93 kg/ha/yr over a period of 22 years. This decrease is caused by changes in morphometry parameters and water quality of Laut Tawar Lake.
Similarity Analysis of Understorey Plant Species in Forest Areas Sidabukke , Simon; Ternala Alexander Barus; Budi Utomo; Delvian; Fathiatul Rizkia Aulin
Journal of Sylva Indonesiana Vol. 5 No. 02 (2022): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (746.991 KB) | DOI: 10.32734/jsi.v5i02.7375

Abstract

Many forests have substantial understorey plants. These plants have an important contribution to soil and water conservation. The similarity index determines the resemblance of species structure and composition in a community. This research is aimed to see the impact and relationship of changes in the allocation of forest areas to the similarity of understorey species. The research was conducted using the line plot sampling method, sized 2 m x 2 m, with the understorey plants observed have been measured from germination to young plant (height 1.5 m). The number of plots in the plantation forest is 480 plots, protected areas 224 plots, and natural forest 96 plots. Determination of the number of understorey plots based on the minimum representative area curve. A Similarity Index was performed to analyze the data.  The results indicated that there is an impact of changes in the forest area on the similarity of understorey species. It is known from the low similarity index value at the research location. It is due to the differences in environmental factors at the two locations such as air humidity, air temperature, the intensity of sunlight, and different patterns of forest area management.
The Opportunity of Understorey Species to Absorb Secondary Metabolites in the Soil (Case Study in IUPHHK- Industrial Plantation Forests PT. Toba Pulp Lestari, Tbk) Sidabukke , Simon; Ternala Alexander Barus; Budi Utomo; Delvian; Mona Fhitri Srena
Journal of Sylva Indonesiana Vol. 3 No. 01 (2020): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.592 KB) | DOI: 10.32734/jsi.v3i01.1982

Abstract

PT. Toba Pulp Lestari, Tbk is one of the industrial forestry companies with Eucalyptus as the main species. This research was conducted in a concession area located in Aek Nauli Plantation, Simalungun Regency, North Sumatra with an area of 22,533 Ha. The sample of this research is understorey species (height: 1.5 meters) under Eucalyptus stand in cycles 2, 3, 4 and 5 planted in 2015. To find out the composition of plant species, vegetation analysis was conducted initially by making minimum species-area curves to determine the number of plots. The placement of the sample starts with randomly distributed on plotted paths. The number of plots in each cycle is as many as 32 plots, 32 plots, 32 plots, 4 plots by 256 plots and 5 plots for 32 plots. The results of soil analysis found that secondary metabolic in eucalyptus soil classified into terpenoid which located at a distance of 50 cm (flat) and 100 cm (flat) from the tree at 2 years old Eucalyptus stand. The terpenoids also distributed in distance of 50 cm from trees with flat topography on 4 years old Eucalyptus stand. For 6 years old Eucalyptus stand, terpenoid distributed on 150 cm from a tree and there was also a saponin within 150 cm from a tree with sloping topography. If the dominant undergrowth grows were Strong and Senduduk, the secondary metabolism in the soil will be absorbed by this species.
Co-Authors Ani Suryanti Betzy Victor Telaumbanua BUDI UTOMO Delvian Desrita Desrita Dinarta Pardede Erlangga Erlangga Fathiatul Rizkia Aulin Hesti Wahyuningsih Irma Shinta Roulia Kartika Dewi Khairunnisa Khairunnisa MARAGUNUNG DALIMUNTHE Mona Fhitri Srena Munawwar Khalil, Munawwar Nababan, Esther Sorta Mauli Rawiyatul Hikmah Riri Ezraneti Rusdi Leidonald Saiful Adhar Sharah Dina Sidabukke , Simon Sudoyo Lumban Tobing Syafrida Siregar Uzi Zefanya Gulo Yessy Christanty Zulham Apandy Harahap