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All Journal Akrab Juara : Jurnal Ilmu-ilmu Sosial Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Yosni Kiuk
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Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Engineering Medicine & Pharmacology

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Blue carbon dynamics and mangrove extent: a case study from the IndonesiaTimor Leste Coastal ecosystem Wanri Sitanggang; Diah Permata Wijayanti; Rudhi Pribadi; Chrisna Adhi Suryono; Maria Dyah Ayu Pitaloka; Egidius Naitkakin; Daniel Candido Da Costa Soares; Herning Pramudya; Yosni Kiuk
Depik 2025: Special Issue ICMF
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.0.0.46912

Abstract

Around 20% of mangrove forests in Indonesia are in a degraded condition, which has a negative impact on the potential for blue carbon storage. When mangroves are damaged or degraded, carbon stored in the soil and vegetation can be released back into the atmosphere as CO2, ultimately increasing greenhouse gas emissions and exacerbating climate change. Mangrove forests can store up to four times more carbon per hectare, around 8001,200 tons per hectare, than terrestrial tropical forests. This research was conducted in the Wini mangrove forest area, North Central Timor, East Nusa Tenggara (NTT) which directly borders Timor Leste. The determination of the location of the observation station was based on a map of changes in mangrove forest land use obtained from the Geospatial Information Agency. The parameters measured included organic carbon, mangrove area and sediment type. Organic carbon was analyzed using the Loss on Ignition (LOI) method, and sediment grain size was measured using a particle size analyzer. The results of the study showed that the average organic carbon stock in mangrove forests reached 570,600843,600 tons per hectare, with an average change in the area of mangrove forests from 2013 to 2023 of 181.29 hectares and the type of sediment dominated by sandy mud. This change in area is caused by the conversion of mangrove land into ponds, rice fields, and settlements.Keywords:MangroveCarbonSedimentborder Area
USE OF VERMICOMPOST IN ENHANCING THE GROWTH OF PAKCHOY PLANTS (Brassica rapa L.) Maria Apriyanti Man; Erminia Pereira Dos Santos; Yosni Kiuk; Onesimus Ke Lele; Frengky Lampu Apu; Siti Rahmah
Akrab Juara : Jurnal Ilmu-ilmu Sosial Vol. 11 No. 2 (2026): Mei
Publisher : Yayasan Azam Kemajuan Rantau Anak Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58487/akrabjuara.v11i2.2797

Abstract

Pakcoy (Brassica rapa L.) is a popular vegetable among Indonesian communities due to its rich content of vitamins and nutrients. During its growth stage, pakcoy requires essential nutrients to stimulate its growth, hence the use of organic fertilizer such as vermicompost as a nutrient source. This research aimed to investigate the effect of vermicompost dosage on the growth and yield of pakcoy. The study at PT. Bali Organik Internasional. There were four treatments applied: K0 (0 g/plant), K1 (150 g/plant), K2 (200 g/plant), and K3 (250 g/plant). The experimental design used was a completely randomized design (CRD) with four replications, resulting in 16 experimental units. Data were analyzed using analysis of variance (ANOVA) followed by Duncan's at a significance level of 5%. The results indicated that the application of vermicompost dosage significantly influenced the growth and yield of pakcoy. Application of vermicompost at K3 dosage (250 g/plant) resulted in the best performance across all parameters (plant height, leaf number, fresh weight of shoots, fresh weight of roots, and root length) for pakcoy.
Co-Authors Chrisna Adhi Suryono Daniel Candido Da Costa Soares Diah Permata Wijayanti Egidius Naitkakin Erminia Pereira Dos Santos Frengky Lampu Apu Herning Pramudya Maria Apriyanti Man Maria Dyah Ayu Pitaloka Onesimus Ke Lele Rudhi Pribadi siti rahmah Wanri Sitanggang