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All Journal CELEBES Agricultural Jurnal Rimba Lestari
Sri Utami, Widia
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Agriculture, Biological Sciences & Forestry

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POTENSI CADANGAN KARBON DAN SERAPAN CO2 ACACIA MANGIUM DI TAMAN KEANEKARAGAMAN HAYATI PT TIRTA INVESTAMA, CISALAK, SUBANG Sri Utami, Widia; Juliani, Rany; Abidin, Zaenal; Santoso, Sidik; Rahayu, Apriliyanti Dwi; Ankhoviyya, Nida
JURNAL RIMBA LESTARI Vol 3 No 2 (2023): Vol. 3 No. 2 (2023)
Publisher : Jurusan Kehutanan

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The Biodiversity Park PT Tirta Investama Cisalak Subang Regency has an area of ± 5,800 hectares which has social, economic and environmental benefits. The Biodiversity Park is one of the efforts to support Indonesia's Nationally Determined Contribution target in mitigating climate change by increasing plant land cover, especially tree-level plants. Tree-level plants at a young age can increase carbon stocks in biomass. Younger stands can absorb more carbon than older stands. Climate change can cause natural disasters such as landslides. Landslides that occur in the work area can cause carbon stock loss. Data were collected by census by inventorying diameter at breast height and total height. Data analysis on standing tree volume used a specific gravity of 0.507 and biomass expansion factor of 1.33. Carbon potential research on Acacia mangium to determine the carbon potential of Taman KEHATI which is carried out by census and to determine CO2 absorption. Acacia mangium is an invasive plant that can grow on critical land and marginal land and has fast growth so that it can be used as one of the types for planting activities on post-landslide land. The aboveground carbon biomass research results in units per hectare are 1.690 tons/ha, carbon absorption of 0.794 tons/ha, and CO2 absorption of 2.912 tons/ha.
Exploration of Plant Disturbing Organisms (PDOs) in Trembesi (Samanea saman) Seedlings in Tectona Bukit Soeharto Seedlings Rucmana Saud, Oshlifin; Syarifudin, Achmad; Rafii Nur Fauzan, Muhammad Rafii; Nugroho, Andi; Sri Utami, Widia
CELEBES Agricultural Vol. 6 No. 1 (2025): CELEBES Agricultural
Publisher : Faculty of Agriculture, Tompotika Luwuk University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52045/jca.v6i1.995

Abstract

The seedling phase is a critical stage in plant development, where the presence of plant-disturbing organisms (PDOs) can significantly reduce seedling quality and viability, particularly in rehabilitation species such as Samanea saman (Trembesi). This study aimed to analyze the intensity of pest and disease attacks, identify the types of PDOs involved, and describe the symptoms and signs of infestation observed in S. saman seedlings at the Tectona Nursery, KHDTK Bukit Soeharto, East Kalimantan. A simple random sampling method was applied to select 50 seedlings from a total population of 1,000 four-month-old individuals. Data collection was conducted through direct field observation of physical plant conditions, severity scoring, and documentation of symptoms and signs of biotic attack. The results showed that all sampled seedlings were affected, with an infestation intensity reaching 65.2%, classified as heavily infested. The observed symptoms included defoliation, foliar tissue loss (skeletonizing), leaf spots, leaf blight, and stem boring. Identified signs of attack included larvae from the order Lepidoptera and  mealybug (Pseudococcidae) and aphids, which are suspected to be the primary agents of tissue damage. These findings underscore the importance of monitoring pest and disease populations and implementing ecologically based Integrated Pest Management (IPM) strategies tailored to the nursery microclimate. Technical training and coordinated IPM implementation are essential to enhance seedling resilience and support the success of tropical forest rehabilitation.
Co-Authors Achmad Syarifudin, Achmad Andi Nugroho, Andi Ankhoviyya, Nida Juliani, Rany Rafii Nur Fauzan, Muhammad Rafii Rahayu, Apriliyanti Dwi Rucmana Saud, Oshlifin Sidik Santoso, Sidik Zaenal Abidin