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Spatial Variations of Soil N2 and N2O Emissions from a Temperate Forest: Quantified by the In Situ 15N Labeling Method
15N labeling dinitrogen emission in situ N2O/(N2O + N2) ratio temperate forest water gradient
2023/12/1
Emissions of dinitrogen (N2) and nitrous oxide (N2O) from soil are important components of the global nitrogen cycle. Soil N2O emissions from terrestrial ecosystems have been well studied. However, pa...
Effects on Greenhouse Gas (CH4, CO2, N2O) Emissions of Conversion from Over-Mature Forest to Secondary Forest and Korean Pine Plantation in Northeast China
secondary forests over-mature forests Korean pine plantation greenhouse gas fluxes global warming potential
2024/2/29
This study aimed to evaluate the seasonal variations of Greenhouse Gas fluxes (CH4, CO2, and N2O), Greenhouse Gas (GHG) emissions, and Global Warming Potential (GWP) over the extent of the regions and...
小兴安岭落叶松沼泽林土壤CO2，N2O和CH4的排放规律
落叶松沼泽林 温室气体排放 季节变化规律 小兴安岭
2010/8/20
采用静态箱-气相色谱法，研究小兴安岭兴安落叶松-油桦-修氏苔草沼泽林、兴安落叶松-油桦-笃斯越橘-藓类沼泽林和兴安落叶松-狭叶杜香-中位泥炭藓沼泽林生长季节土壤温室气体（CO2,N2O和CH4）排放通量的季节变化规律、季节排放量及其主控因素。结果表明： 1）3种落叶松沼泽林土壤CO2排放通量均呈现夏季高（651.4～823.6 mg·m-2h-1）春秋季低（233.3～310.0 mg·m-2h-...
贡嘎山山地暗针叶林带森林土壤温室气体N2O和CH4排放研究
贡嘎山 山地暗针叶林 土壤
2009/3/19
利用静态箱法对贡嘎山森林生态系统峨眉冷杉原始林、演替林以及峨眉冷杉采伐迹地土壤N2O和CH4排放通量进行了测定. 结果表明: (1) 各观测点土壤向大气释放N2O, 土壤为大气N2O的排放源, 而CH4的排放通量均为负值, 土壤为大气CH4的吸收汇, 各观测点N2O年均排放通量的对比关系为峨眉冷杉(Abies fabri)原始林＞采伐迹地>演替林, CH4年均吸收通量则表现为峨眉冷杉原始林＞演替林...
鼎湖山主要森林土壤N2O排放及其对模拟N沉降的响应
2007/8/29
摘要研究了鼎湖山生物圈保护区马尾松(Pinus massoniana)林、混交林和季风常绿阔叶林（季风林）土壤N2O排放特 征及其对氮沉降增加的响应。在1999～2002年期间，3种森林土壤N2O排放速率均 表现明显的季节性变化特点， 但这种季节性变化因年份和森林类型不同而异，总的来说，3种森林土壤N2O排放速率呈现夏秋季较高而冬春季较 低的变化。土壤N2O排放速率在3年观测期间的平均值分别为（g...