Pendugaan Status Fluks Karbondioksida dan Metana pada Tanah Tegakan Jati Unggul di KHDTK Wanagama 1

Zaini Silvia Aryani, Prof. Dr. Ir. Budiadi, S.Hut., M.Agr.Sc., IPU; Dr. Ir. Handojo Hadi Nurjanto, M.Agr.Sc., IPU

2025 | Skripsi | KEHUTANAN

Fluks karbon pada hutan terjadi melalui sejumlah proses alami meliputi fotosintesis, respirasi, dan dekomposisi. Informasi mengenai fluks gas karbondioksida (CO₂) dan metana (CH₄) di tegakan jati unggul KHDTK Wanagama 1 masih terbatas. Penelitian ini bertujuan untuk mengkaji estimasi fluks CO₂ dan CH₄ serta hubungannya dengan faktor lingkungan mikro di tegakan jati unggul pada musim penghujan.

Penelitian dilakukan di petak 13 tegakan jati unggul KHDTK Wanagama 1 pada bulan Februari. Penentuan lokasi menggunakan metode purposive sampling dan pengukuran fluks menggunakan Portable Chamber System Liangber-02P (LI-7810 Li-Cor) metode chamber tertutup dengan tiga plot dan tiga waktu pengukuran yakni pada pagi 07.00 – 09.00, siang 11.00 – 13.00, dan sore 15.00 – 17.00 selama tiga hari. Pengukuran fluks CO₂ dan CH₄, suhu, dan kelembaban tanah dilakukan bersamaan pada 15 titik setiap plot sedangkan pengukuran berat volume dan C-organik dilakukan secara sampling pada 5 titik setiap plot. 

Hasil penelitian menunjukkan bahwa estimasi fluks CO₂ dan CH₄ di tegakan jati unggul secara berturut-turut yaitu 435,44 – 827,16 mgCO₂ m^-2 h^-1 dan -4,95 – -10,66 µgCH₄ m^-2 h^-1. Fluks CO₂ pada tegakan jati unggul Wanagama 1 pada musim penghujan dipengaruhi oleh C-organik, akumulasi C-organik, dan berat volume tanah sedangkan fluks CH₄ dipengaruhi oleh kelembaban tanah dan berat volume tanah.

Forest carbon flux is conducted through several natural processes, including photosynthesis, respiration, and decomposition. Information on carbon dioxide (CO₂) and methane (CH₄) gas fluxes in Wanagama 1 clonal teak stand is limited. This study aims to examine the estimation of CO₂ and CH₄ fluxes and their relationship with microclimate factors in clonal teak stands during rainy season.

This study was conducted in compartment 13^th clonal teak stands of KHDTK Wanagama 1 in February. The location was determined using purposive sampling method and flux measurements were taken using the Liangber-02P Portable Chamber System (LI-7810 Li-Cor) closed chamber method with three plots and three measurement period at 07.00 – 09.00, 11.00 – 13.00, and 15.00 – 17.00 over three days. Flux measurement, soil temperature, and soil moisture were taken simultaneously 15 points each plot, while bulk density and soil organic carbon measurements were taken by sampling at 5 points in each plot.

The results showed CO₂ flux in clonal teak stand was estimated to be 435,44 – 827,16 mgCO₂ m^-2 h^-1and CH₄ flux was estimated to be -4,95 – -10,66 µgCH₄ m^-2 h^-1, respectively. CO₂ flux during the rainy season was influenced by organic C-content, C-organik accumulation, and soil bulk density, while CH₄ flux was influenced by soil moisture and soil bulk density.   

Kata Kunci : Fluks CO2, Fluks CH4, Jati Unggul, Variasi Temporal dan Spasial