title: [Vertical distribution characteristics of N2O emission in tea garden and its adjacent woodland].
abstract: In this study, we determined the vertical distribution of N2O emission rates in tea soils and its adjacent woodland soils. The results showed that total nitrogen contents, N2O fluxes and cumulative emissions in the tea garden and woodland decreased with the increasing depth of the soil layer, and their average values were greater in tea garden than in woodland. Generally, pH, soil water soluble organic nitrogen (WSON), soil microbial biomass nitrogen (MBN), NO(3-)-N and NH(4+)-N contents had a downward trend with the increasing depth of soil layer. The WSON, MBN, NO(3-)-N and NH(4+)-N contents from each soil layer were greater in tea garden than in woodland, but the pH value in tea garden was lower than that in woodland. The N2O emission rate was significantly positively related with TN, MBN and NH(4+)-N contents, but not with pH value. The N2O emission rate was significantly correlated with WSON content in woodland, but not in tea garden. The N20 emission rate was significantly correlated with NO(3-)-N concentration in tea garden, but not in woodland. WSON/TN and N2O-N/SMBN were averagely greater than in tea garden in woodland, and SMBN/TN was opposite. These results indicated that tea soil was not conducive to accumulate nitrogen pool, maintain soil quality and its sustainable use compared to woodland.
authors.forename: Li-chao
authors.initials: LC
authors.lastname: Fan
authors.forename: Wen-yan
authors.initials: WY
authors.lastname: Han
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Zhi-xin
authors.initials: ZX
authors.lastname: Li
mesh_terms: D000383:Agriculture; D018533:Biomass; D028241:Camellia sinensis / Q000502:physiology*; D065928:Forests; D009584:Nitrogen / Q000032:analysis; D009609:Nitrous Oxide / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D014867:Water
chemical_list: D012987:Soil; D014867:Water; D009609:Nitrous Oxide; D009584:Nitrogen