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首页> 外文期刊>Soil Science and Plant Nutrition >Effects of land-use type and nitrogen addition on nitrous oxide and carbon dioxide production potentials in Japanese Andosols.
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Effects of land-use type and nitrogen addition on nitrous oxide and carbon dioxide production potentials in Japanese Andosols.

机译：土地利用类型和氮的添加对日本Andosols中一氧化二氮和二氧化碳生产潜力的影响。

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摘要

Land-use type and nitrogen (N) addition strongly affect nitrous oxide (N2O) and carbon dioxide (CO2) 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 N2O and CO2 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-1 yr-1. Land-use type had a significant (p<0.001) impact on the cumulative N2O and CO2 production. Soils from the apple orchard had higher N2O and CO2 production potentials than those from the grassland and forest soils. Soil net N mineralization rate had a positive correlation with both soil N2O and CO2 production rates. Furthermore, the N2O production rate was positively correlated with the CO2 production rate. In the soils with no N addition, the dominant soil properties influencing N2O production were found to be the ammonium-N content and the ratio of soil microbial biomass carbon to nitrogen (MBC/MBN), while those for CO2 production were the content of nitrate-N and soluble organic carbon. N2O 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 CO2 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 N2O and CO2 production in the examined soils under aerobic incubation conditions.
机译：土地利用类型和氮（N）的添加强烈影响一氧化二氮（N 2 O）和二氧化碳（CO 2 ）的生产，但它们的相互作用和影响控制因素仍不清楚。这项研究的目的是同时评估这两个因素对N 2 O和CO 2 产量及其相关土壤化学和生物学特性的影响。选择日本中部三个相邻土地（苹果园，草地和落叶林）的表层土壤（0-10厘米），并在有氧条件下温育12周，并添加0、30或150 kg N ha -1 yr -1 。土地利用类型对累积N 2 O和CO 2 生产有显着（p <0.001）影响。苹果园土壤的N 2 O和CO 2 的生产潜力均高于草地和森林土壤。土壤净氮矿化率与土壤N 2 O和CO 2 生产率均呈正相关。此外，N 2 的生产速率与CO 2 的生产速率呈正相关。在不添加氮的土壤中，影响N 2 O产生的主要土壤性质是铵态氮含量和土壤微生物量碳氮比（MBC / MBN），而产生CO 2 的是硝态氮和可溶性有机碳的含量。在三种土地利用类型中，N 2 O的产量随着氮素添加量的增加而增加，并且取决于初始土壤有效氮的状态。氮素添加对CO 2 < / sub>生产随土地用途类型而异;随着氮素添加量的增加，苹果园和森林土壤氮素含量下降，草地土壤氮素含量增加。这种差异可能是由于MBC / MBN比值所指示的微生物菌群差异所致。在需氧条件下，土壤氮矿化是控制被测土壤中N 2 O和CO 2 产生的主要过程。

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