Effects of Biochar Amendment on CO2 Evolution in Four Ecotypes of Leyte Sab-A Basin Peatland, Philippines 10.32526/ennrj/23/20240274
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Abstract
Atmospheric carbon cycle criticisms are significant liabilities in existing predictions of future climate. Carbon dioxide (CO2) discharges caused by climate warming through dense peat stores will frame a stable positive carbon cycle–atmospheric input. An experimental-descriptive analytical method was used to acquire data on quantifying the amount of CO2 evolved in the four adjacent ecotypes of Leyte Sab-A Basin Peatland (LSBP), Philippines, both with and without biochar incorporation. Results showed that after 120 days of incubation, the CO2 evolved between ecotypes measured 0.73 mg CO2/g, 0.31 mg CO2/g, 0.23 mg CO2/g, and 0.20 mg CO2/g for TML (marshland), TPF (peat forest), TAL (agricultural land), and TMV (mixed vegetation), respectively. In comparison, treatments with biochar were 0.81 mg CO2/g, 0.57 mg CO2/g, 0.46 mg CO2/g, and 0.43 mg CO2/g for TMLB (marshland+biochar), TPFB, TMVB, and TALB, respectively. Results rendered significant differences between ecotypes, and between those with added biochar (p-value: 1.8E-06). This study concludes that TML with and without biochar had the highest evolved CO2 over time, implying the best ecosystem preservation among the ecotypes. For future studies, these findings establish a scientific basis for adaptive response assessment of peatlands to climate change, and for decisions made in support of policy changes.
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