Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Journal of Ecological Engineering

2 2025

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Environmental performance of nephrolepis as natural nitrate accumulator: a life cycle perspective in smallholder oil palm ecosystem

Siallagan Eko Jaya, Siregar Yusni Ikhwan, Nofrizal Nofrizal, Ismail Ujang Paman

Journal of Ecological Engineering

2025

Vol. 26, nr 4

291--300

This study investigated the environmental performance of Nephrolepis as a natural nitrate accumulator in small-holder oil palm ecosystems through a life cycle assessment approach. The research was conducted in Surya Indah Village, Pelalawan-Riau Regency, from January to May 2024, comparing natural (T1) and enhanced (T2) treatments across three blocks. Results demonstrated that enhanced treatment significantly improved Nephrolepis biomass production (389.8 g/m 2 compared to 305.3 g/m 2 in natural conditions) and nitrogen accumulation capacity (2.58% in fronds under enhanced conditions versus 2.34% in natural conditions). Soil analysis revealed that Nephrolepis cultivation effectively reduced nitrate leaching, with enhanced treatment showing the lowest soil nitrate concentrations (8.2 mg/kg in topsoil) compared to cleared treatments (18.6 mg/kg). Life cycle impact assessment indicated that enhanced management practices resulted in lower environmental impacts across all categories, with reduced global warming potential (382.4 kg CO 2 eq/ha/year), eutrophication potential (2.68 kg PO 4 eq/ha/year), and water depletion (228.4 m3/ha/year). These findings suggest that integrating Nephrolepis into smallholder oil palm systems, particularly under enhanced management practices, offers a promising approach for improving nutrient management while reducing environmental impacts in oil palm ecosystems.

Engineering carbon dynamics and vegetation indices in oil palm plantations: An integrated assessment of carbon stocks, normalized difference vegetation index, and net ecosystem exchange in Riau Province

Siallagan Eko Jaya, Siregar Yusni Ikhwan, Nofrizal Nofrizal, Ismail Ujang Paman

Journal of Ecological Engineering

2025

Vol. 26, nr 2

342--349

This research examines carbon dynamics and vegetation indices in oil palm plantations across Riau Province through an integrated analysis of carbon stocks, normalized difference vegetation index (NDVI), and Net Ecosystem Exchange (NEE). Observations were conducted in six districts (Kampar, Siak, Pelalawan, Rokan Hulu, Indragiri Hulu, and Indragiri Hilir) from August 2022 to May 2024, using a nested sampling design focusing on productive oil palmsaged 8–16 years. Results showed significant variations in carbon stocks among districts, with Rokan Hulu and Indragiri Hilir consistently demonstrating the highest carbon storage capacity (41.43–43.46 tC·ha-1). NDVI analysis revealed increasing values from 2022 to 2024, with Siak District reaching the highest value (0.81) in 2024. Meanwhile, NEE in all districts showed negative values (-1.64 to -1.82 gC/m2/day), indicating that oil palm plantations serve as net carbon sinks. This research provides a comprehensive understanding of carbon dynamics in oil palm plantation systems and their contribution to climate change mitigation, while highlighting the importance of sustainable management practices in optimizing carbon sequestration.