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All Journal Jurnal Biologi Tropis Unri Conference Series: Community Engagement
Sari, Efilda
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Pemberdayaan Masyarakat melalui Sosialisasi Pembuatan Pupuk Organik Cair Berbasis Limbah Rumah Tangga untuk Meningkatkan Kualitas Lingkungan dan Produktivitas Tanaman di Desa Jayapura, Kabupaten Siak Sari, Efilda; Andrikasmi, Sukamarriko; Dewita, Salsa Gading; Saputra, Wijaya; Ramadhani, Syakirah; Sitanggang, Dina Sesilia BR; Diyandra, M. Zaky; Silalahi, Yohana Elfrida; Andika, Restu; Panjaitan, Ribka Mattathiah; Pratama, Mario Aji; Somayani, Somayani; Fadillah, Farhan Marsha
Unri Conference Series: Community Engagement Vol 7 (2025): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.7.119-125

Abstract

Ineffective household waste management is often the cause of environmental pollution and public health problems. One applicable solution is processing household organic waste into liquid organic fertilizer (LOF), which is beneficial for plants and environmentally friendly. This community service program will be conducted in Jayapura Village, Bungaraya District, Siak Regency, with the aim of empowering the community to convert organic waste into valuable products. The method used is a participatory approach through socialization, training, and hands-on practice in making LOF. The results of this community service showed high enthusiasm from the participants during all stages of the activity. The training participants were able to understand the LOF production process well and began to apply it independently in their home gardens. In addition to producing useful fertilizer, this activity also has the potential to reduce the amount of waste disposed into the environment. The benefits of this program are not only experienced individually but also collectively through the creation of a healthier and more productive environment. This activity is expected to serve as a model for the application of simple, practical technology, strengthen environmental awareness, and encourage community independence in supporting sustainable household agriculture.
Analysis of the Physical and Chemical Properties of Soil in the Riau University Arboretum Pebriandi, Pebriandi; Marsanda, Gilang Panca; Desvita, Zeki; Sari, Efilda; Darlis, Vinny Volcherina; Oktorini, Yossi; Irfani, Ewi; Nugraha, Lefdi Agung; Pertiwi, Hutami Indah
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.10805

Abstract

Soil is an important component of forest ecosystems because it acts as a provider of nutrients, a support for vegetation, and a regulator of biogeochemical cycles. Variations in the physical and chemical properties of soil are greatly influenced by vegetation cover and soil depth. This study aims to analyse the chemical properties of soil in two types of vegetation cover, namely dense and moderate cover, in the Riau University Arboretum, which was determined using the Normalised Difference Vegetation Index (NDVI) method. Soil samples were taken at three depths (0–10 cm, 10–20 cm, and 20–30 cm) to determine the vertical variation in soil chemical properties. The parameters analysed included pH, organic carbon (organic C), total nitrogen (total N), phosphorus (P₂O₅), and potassium (K₂O). The results showed that soil pH was in the acidic category, ranging from 4.43 to 5.21. Organic carbon content was higher in the surface layer than in the lower layers, with the highest value of 5.14% in medium cover. Total N content was low in all samples (0.11–0.25%), indicating a limitation of nitrogen as a factor restricting vegetation growth. The nutrient elements P₂O₅ and K₂O tended to be higher in the surface layer, especially in dense cover (P₂O₅ = 26.66 mg/100 g; K₂O = 24.56 mg/100 g). In general, dense cover was able to maintain nutrient availability better than medium cover, although medium cover had relatively higher organic C content on the surface. These findings confirm that vegetation cover plays an important role in maintaining soil quality, and the preservation of dense vegetation needs to be optimised to support soil fertility and the sustainable conservation function of the arboretum.
Co-Authors Andika, Restu Andrikasmi, Sukamarriko Darlis, Vinny Volcherina Desvita, Zeki Dewita, Salsa Gading Diyandra, M. Zaky Ewi Irfani Fadillah, Farhan Marsha Marsanda, Gilang Panca Nugraha, Lefdi Agung Panjaitan, Ribka Mattathiah Pebriandi, Pebriandi Pertiwi, Hutami Indah Pratama, Mario Aji Ramadhani, Syakirah Silalahi, Yohana Elfrida Sitanggang, Dina Sesilia BR Somayani, Somayani Wijaya Saputra, Wijaya Yossi Oktorini