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Jurnal Biologi Universitas Andalas
Published by Universitas Andalas
ISSN : -     EISSN : 23032162     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 13 Documents
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Search results for , issue "Vol 3, No 2 (2014)" : 13 Documents clear
Analisis Vegetasi Gulma Pada Perkebunan Karet (Hevea brasiliensis Mull.Arg.) di Kecamatan Batang Kapas, Kabupaten Pesisir Selatan Rista Novalinda; Zuhri Syam; - Solfiyeni
Jurnal Biologi Universitas Andalas Vol 3, No 2 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.2.%p.2014

Abstract

Vegetation analysis of weeds at rubber plantation (Hevea brasiliensis Mull.Arg.) at Batang Kapas, Pesisir Selatan, was carried out from March to April 2013. The weeds were sampled purposively using plot quadrat method at three and six years old of rubber plantations. There were totally 13 families, 23 genera dan 27 species of weeds found in the two types of rubber plantations. The two locations were dominated by different species of weeds. Borreria alata has the highest Summed Dominance Ratio (SDR) at three years and Scleria sumatrensis at six years old of rubber  plantations. Diversity indices were relative moderate (2,17 at three years old and 2,2 at six years old rubber plantations) in both locations and species similarity between the two location were low (45,7%).
Analisa Vegetasi Gulma pada Pertanaman Jagung (Zea mays L) pada Lahan Olah Tanah Maksimal di Kabupaten Lima Puluh Kota Bonna Suveltri; Zuhri Syam; - Solfiyeni
Jurnal Biologi Universitas Andalas Vol 3, No 2 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.2.%p.2014

Abstract

Research about the vegetation analysis of weeds in corn (Zea mays, L.) plantation in maximal prepared land in Lima Puluh Kota Regency had been conducted from October to November 2013 by using systematic squares method of 10 total plots with size1x1 m. It was found 563 individuals weeds, consist of 10 families, 18 genera and 18 species. Echinochloa crus-galii showed the highest value of SDR (Summed Dominance Ratio) (29.33%) and Zizania ceduciflora (0.77%) in maximal prepared land. The diversity index was H'= 1.558 (moderate). This land was dominated by wide-leaf group of weeds.Keywords: Weeds, corn, composition, structure, land
Jenis-Jenis Paku Sarang (Asplenium): Aspleniaceae di Gunung Singgalang Sumatera Barat Hari Fitrah; Ardinis Arbain; - Mildawati
Jurnal Biologi Universitas Andalas Vol 3, No 2 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.2.%p.2014

Abstract

Taxonomical study of Asplenium fern has been conducted in Mt. Singgalang, West Sumatra from April to July 2013. The purpose of this study was to identify the Asplenium species in the mountain and to describe their morphological characteristics. The sample were collected using survey and observation methods along habitual paths at Koto Baru, Tanah Datar and Balingka, Agam. The result of this study have found eleven species of Asplenium. Those spesies were A. affine, A. caudatum, A. glaucaphyllum, A. nidus, A. pellucidum, A. phylitids, A. polyodon, A. salignum, A. scortechinii, A. tenerum and A. unilateral. Those species belong to all five original groups of Asplenium based on morphological characteristics.Keywords: Asplenium, characteristics, mount Singgalang, species

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