[Denitrification and Anaerobic Ammonium Oxidation in Soil Nitrogen Migration Process in a Farmland of Wanshandang Lake].

• DOI: 10.13227/j.hjkx.201904097
• Publication Date: 2020-01-08
• Authors: Zhihao Chen; Yunbin Qin; Bangjing Ding; Youyou Hu; Shi Chen; Zhengkui Li
• Keywords: Anammox

To explore the rate variation and contribution to N loss of denitrification anaerobic ammonia oxidation (ANAMMOX) in nitrogen migration process farmland soils southern China, we assess physicochemical characteristics soil samples different layers from land use types (farmland, river channel, riparian zone, lake sediment) a wheat-rice rotation area Wanshandang Lake. Illumina MiSeq sequencing quantitative real-time polymerase chain reaction (qPCR) are used investigate microbial community composition functional gene abundances samples. The potential ANAMMOX (calculated by N2) each sample was determined an isotope culture experiment. It demonstrated that significantly positively correlated with TOC, NH4+-N, NO3--N (P<0.05), nirS, nirK, nosZ (P<0.05). surface (11.51±1.04) nmol·(g·h)-1, which higher than other While highest 20-30 cm layer reached (0.48±0.07) nmol·(g·h)-1. In addition, main cause studied farmland, accounting for 91.9%-99.7% overall loss, played important role production N2 deep soils.