Effects of land-use type and nitrogen addition on nitrous oxide and carbon dioxide production potentials in Japanese Andosols

Abstract

Land-use type and nitrogen (N) addition strongly affect nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) production, but the impacts of their interaction and the controlling factors remain unclear. The aim of this study was to evaluate the effect of both factors simultaneously on N 2 O and CO 2 production and associated soil chemical and biological properties. Surface soils (0-10 cm) from three adjacent lands (apple orchard, grassland and deciduous forest) in central Japan were selected and incubated aerobically for 12 weeks with addition of 0, 30 or 150 kg N ha. Land-use type had a significant (p < 0.001) impact on the cumulative N 2 O and CO 2 production. Soils from the apple orchard had higher N 2 O and CO 2 production potentials than those from the grassland and forest soils. Soil net N mineralization rate had a positive correlation with both soil N 2 O and CO 2 production rates. Furthermore, the N 2 O production rate was positively correlated with the CO 2 production rate. In the soils with no N addition, the dominant soil properties influencing N 2 O production were found to be the ammonium-N content and the ratio of soil microbial biomass carbon to nitrogen (MBC/MBN), while those for CO 2 production were the content of nitrate-N and soluble organic carbon. N 2 O production increased with the increase in added N doses for the three land-use types and depended on the status of the initial soil available N. The effect of N addition on CO 2 production varied with land use type; with the increase of N addition doses, it decreased for the apple orchard and forest soils but increased for the grassland soils. This difference might be due to the differences in microbial flora as indicated by the MBC/MBN ratio. Soil N mineralization was the major process controlling N 2 O and CO 2 production in the examined soils under aerobic incubation conditions.

Effect of dolomite and biochar addition on N2O and CO2 emissions from acidic tea field soil

“…This pattern of emission was due to rapid mineralization of the readily decomposable soil organic carbon [ 44 ]. Our result for CO 2 production was in close agreement with the study of Kong et al [ 45 ], which also observed the highest CO 2 production during the initial phase of the incubation, and then it decreased with incubation time.…”

Combined Application of Biochar and Lime Increases Maize Yield and Accelerates Carbon Loss from an Acidic Soil

“…It can be observed that in the initial stage of our study (on day 4), the CO 2 flux was highest from all the treated soils. This result is in line with the studies of Kong et al [81] and Wang et al [82]. The plausible mechanism was the decomposable soil organic carbon's rapid mineralization [83].…”

Effect of Maize Straw–Derived Biochar on Calcareous Arable Soil Organic Carbon Mineralization Under the Condition of with or Without Nitrogen-Fertilizer Addition

“…In our study, soil CO 2 emission rate was faster during the first 15 days, and then decreased gradually until the end of incubation. The result was consistent with the findings of Kong et al (2013) and Amin (2020), and the phenomenon was due to the rapid mineralization of readily decomposable organic carbon in the soil initially. As the incubation process continued, the easily decomposable organic carbon in the soil was consumed preferentially by the microbes, while it needed a relatively long time for the consumption of the hardly decomposable substances by microbes, which led to a gradual decrease of CO 2 emission rate (Oo et al 2018).…”