Dissolved N2O concentrations in oil palm plantation drainage in a peat swamp of Malaysia

• DOI: 10.1016/j.scitotenv.2023.162062
• Publication Date: 2023-02-16T01:22:34Z
• Authors: Kazuya Nishina; Lulie Melling; Sakae Toyoda; Masayuki Itoh; Kotaro Terajima; Joseph W.B. Waili; Guan X. Wong; Frankie Kiew; Edward B. Aeries; Ryuichi Hirata; Yoshiyuki Takahashi; Takashi Onodera
• Keywords: Swamp

Oil palm plantations in Southeast Asia are the largest supplier of oil products and have been rapidly expanding last three decades even peat-swamp areas. on peat ecosystems a unique water management system that lowers table and, thus, may yield indirect N2O emissions from drainage system. We conducted two seasons spatial monitoring for dissolved concentrations adjacent rivers swamps Sarawak, Malaysia, to evaluate magnitude this ecosystem. In both dry wet seasons, mean median exhibited over-saturation water, i.e., plantation be source atmosphere. season, distribution showed bimodal peaks unsaturated over-saturated concentrations. The bulk δ15N was higher than inorganic N (i.e., fertilizer soil organic nitrogen) during seasons. An isotopocule analysis suggested denitrification major N2O, followed by reduction processes occurred water. site preference mapping revealed significant proportion produced is reduced N2 before being released into