摘要
采用静态箱/气相色谱(GC)法测定了2004年及2005年大豆田CO2和N2O排放通量。结果表明:在2年的观测期内,大豆田的CO2和N2O排放均具有明显的季节变化规律。在2个生长季的观测中,CO2和N2O的排放通量分别呈现出相似的变化趋势。大豆田在休闲期内基本没有CO2排放,冻融期有少量的N2O排放。分析相关影响因素得知,土壤温度和土壤水分是影响大豆田释放CO2和N2O的重要因素。大豆植株对于N2O的排放具有不可忽视的作用。2年观测中常规处理的N2O通量总量分别是无作物处理的2.28倍和1.80倍。
CO2 and N2O emission fluxes and seasonal variations of soybean fields in lower reaches of Liaohe Plain were measured during two years synchronously for the first time by static closed chamber-gas chromatograph to find relationship between two gases＇ emission fluxes and impact factors. Results showed significant seasonal variations of CO2 and N2O emissions in soybean fields; Soil temperature and moisture were two important factors that influenced CO2 and N2O emission in soybean fields, while soybean plant was another important factor that increased NzO emission fluxes; N2O emission flux of normal treatment were 2.28 and 1.80 times of CK in 2004 and 2005, respectively.
出处
《土壤》
CAS
CSCD
北大核心
2006年第6期708-711,共4页
Soils
基金
国家自然科学基金重点项目(40331014)
院创新专题(KZ-CX-SW-01-01B-13)
中国科学院沈阳生态实验站基金项目(SYZ0302)资助
关键词
大豆
CO2
N2O
影响因素
Soybean, Carbon dioxide, Nitrous oxide, Impact factor
