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All Journal Saintia Biologi REINWARDTIA Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Floribunda IJOEP : International Journal of Ecophysiology Reinwardtia
Nursahara Pasaribu
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Law, Crime, Criminology & Criminal Justice Social Sciences

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Journal : Saintia Biologi

 1 
KOMPOSISI DAN STRUKTUR RERUMPUTAN DI KAWASAN DANAU TOBA DESA TOGU DOMU NAULI KECAMATAN DOLOK PARDAMEAN KABUPATEN SIMALUNGUN SUMATERA UTARA Pinta Omas Pasaribu; M Zaidun Sofyan; Nursahara Pasaribu
Saintia Biologi Vol 1, No 2 (2013)
Publisher : Saintia Biologi

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Abstract

The composition and structure of grasses in Toba Lake Area Togu Domu Nauli Village, Dolok Pardamean Subdistrict, Simalungun Regency, North Sumatra has been studied from March to June 2012. The study site is determined by purposive sampling method and it is divided three locations based on altitude with 20 plots of  1 x 1 m size for each area. There are 21 species of grasses that belong to two families found at three study sites. The first area was dominated by Imperata cylindrica, the second was dominated by Leersia hexandra, and the third was dominated by Imperata cylindrica with importance values are 58.408 %, 72.202 %, and 81.316 %, respectively. The diversity index (H’) of grasses are 1.826, 1.432, 1.010 at area I, II, and III, respectively and equitability index (E) of grasses are 0.658, 0.597, 0.519 at area I, II, and III, respectively. The Similarity index of grasses ranges from 46.91% to 62.56%, with the highest similarity index is 62.56%  that is found between area II and III.   Keyword : Composition, grasses, Simalungun, structure.
KOMPOSISI DAN STRUKTUR RERUMPUTAN DI KAWASAN DANAU TOBA DESA HARANGGAOL KECAMATAN HARANGGAOL HORISON KABUPATEN SIMALUNGUN SUMATERA UTARA Novia Wulandari Tarigan; M Zaidun Sofyan; Nursahara Pasaribu
Saintia Biologi Vol 1, No 2 (2013)
Publisher : Saintia Biologi

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Abstract

The composition and structure of Grasses in Haranggaol Village Haranggaol Horison Subdistrict Simalungun Regency North Sumatra has been studied from April to July 2012. The objective of the study was to determine the composition and structure of grasses at different altitudes. Sampling area was defined by purposive sampling method  and divided into three locations based on altitude with 20 plots of 1 x 1 m size for each area. From the study it was found 24 species of grasses that belong to two families. The first location was dominated by Microstegium ciliatum (81.095%), the second was dominated by Deyeuxia brachyathera (68.504%) and the third was dominated by Leersia hexandra (79.158%). The diversity index  (H')  of grasses are 1.557, 1.790 and 1.414 in the location I, II and III, respectively and equitability index (E) of grasses are 0.607, 0.661, 0.726 in the location I, II and III, respectively. The similarity index ranges from 30 to 50%, with the highest similarity index is 50% that was found between location I and II.   Keyword: composition, grass, Haranggaol, structure
KEANEKARAGAMAN POHON DAN POLE SERTA POTENSI KARBON TERSIMPAN DI KAWASAN HUTAN SEKUNDER 30 TAHUN DAN PERKEBUNAN KOPI DI TELAGAH, LANGKAT Jhon Marthali Simamora; Retno Widhiastuti; Nursahara Pasaribu
Saintia Biologi Vol 1, No 2 (2013)
Publisher : Saintia Biologi

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Abstract

The diversity of tree, pole and potential of carbon stored in 30 years secondary forest and coffee field at Telagah District of Langkat was investigated from February to June 2012. The  study site was determined by purposive sampling method with total area 40 x 200 meters. The study site is divided into 20 plots and sub plots. Result found that 15 families and 23 species for tree phase and 16 families and 26 species of pole phase. The area were dominated by Macaranga tanaria with important value 57.11% for tree, and followed by Ficus aurantiacea with important value 54. 472% for pole. The diversity index of tree is 2.650 and 2.715 for pole. Equitability index of tree is 0.520 and 0.586 for pole. The potential of carbon stored in tree is 146.519 ton/ha, 3.933 ton/ha for pole, and 0.0489 ton/ha for coffee plantation.   Keywords: Carbon, Coffee Plantation, Diversity, Important value index, pole, purposive sampling
Co-Authors Afiatri Putrika Agus Salim Harahap Albert Pasaribu Arief Hidayat DIAN APRIANI Elizabeth A. widjaja Elizabeth Anita Widjaja Eny Yuniati etti sartina siregar FADZILAH AG Ferdinand Susilo Fuad Bahrul Ulum Indah Wahyuni Jhon Marthali Simamora KANAK KANJANA WONGKUNA LESLEY C. LUBOS LUONG THIEN TAM M Zaidun Sofyan Mika Rizki Puspaningrum MOHD RAWIYANI PG. HJ. SERUDIN MONICA SULEIMAN Musyarofah Zuhri NG AIK MIN Novia Wulandari Tarigan NURLISMA JUNITA Pinta Omas Pasaribu Retno Widhiastuti ROBBERT GRADSTEIN SOONTHREE KORNOCHALERT Syamsuardi Syamsuardi YONG KIEN–THAI