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All Journal Journal of Tropical Biodiversity and Biotechnology Journal of Tropical Crop Science and Technology
Oktaviant, Dimas Panji
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology

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Ecological Study of Bidens pilosa in Bandung, West Java, Indonesia Oktaviant, Dimas Panji; Rosleine, Dian
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 3 (2024): September
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.88675

Abstract

Bidens pilosa has been widely distributed from tropical to temperate regions and is often reported as a weed in agriculture. It readily thrives in various environments, naturally spreading to open areas and artificial ecosystems, establishing new populations, emphasising the need for ecological studies to prevent its invasive potential. In this study, we focused on population study of B. pilosa and its distribution in Bandung as urban area. Survey was conducted using 1x1 m quadrate plots in eight locations (24 plots). Individual number of B. pilosa, the number of flowers in each individual, coordinates, and altitude of each plot were recorded to describe population structure and map this population in Bandung. Air temperature (°C), humidity (%), light intensity (Lux), and soil water content (%) were measured. Individual number and environmental condition are analysed using cluster analysis and PCA, then mapped using IDW (Inverse Distance Weighting). The highest population in AR (652 ind), followed by CG (626 ind), TR (253 ind), PA (135 ind), CW (78 ind), NR (39 ind), PU (28 ind), and PR (20 ind). On average, each B. pilosa individual produces 61 inflorescences, indicating a mature population with all developmental stages present across all locations. Ordination plots shows that B. pilosa has wide range of environmental condition from open to shade area with various environmental condition. Open areas, settlements, and agriculture host dense B. pilosa populations, and its biological traits suggest it may become invasive without proper control. 
The Added Effects of Rice Husk Ash Against to Growth and Yield on Basil (Ocimum basilicum) Oktaviant, Dimas Panji; Purbajanti, Endang Dwi; Budiyanto, Susilo
Journal of Tropical Crop Science and Technology Vol. 1 No. 2 (2019): VOLUME 1, NO. 2, OCTOBER 2019
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jtcst.v1i2.10383

Abstract

Basil is a spice plant that is widely used as a culinary additive, fragrance, atractan, and anti-bacterial because it produces essential oils, basil oil. This research aimed to identifying the affect of adding rice husk ash on different basil’s cultivars on growth and yield of basil (Ocimum basilicum). This research use 4 x 2 factorial experiment pattern with Completely Randomized Design consisting of 5 replication. The first treatment was various type of basil’s cultivars such as Genovese cultivars (K1) and Dark Opal cultivars (K2). The second treatment was doses of rice husk ash such as control or without giving rice husk ash (M0), 30 g/pot (M1), 35 g/pot (M2), dan 40 g/pot (M3).  The observed parameters were soil bulk density and porosity, plant height, leaves total, roots length, and leaves simplisia. The results showed that the application of husk ash can affect the increase in physical properties of the soil, but has not directly affected the growth parameters and yield of leaf simplisia. Dark Opal cultivars on all growth parameters showed higher yields, but Genovese cultivars showed higher yields or simplisia.
Co-Authors Dian Rosleine, Dian Endang Dwi Purbajanti Susilo Budiyanto