四川桤柏混交林土壤N_2O排放的实测与模拟

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	四川桤柏混交林土壤N_2O排放的实测与模拟
	王艳强; 朱波; 高美荣; 王小国
刊名	中国环境科学
	2009-03-15
卷号	29 期号:3 页码:242-247
关键词	Forest-DNDC模型 N2O排放桤柏混交林地
其他题名	Measurement and simulation of N2O emissions from a alder and cypress mixed plantation in hilly areas of the central Sichuan Basin
通讯作者	朱波
合作状况	国内
中文摘要	采用静态箱-气相色谱法对川中丘陵区桤柏混交林土壤N2O排放进行了连续两年的测定.通过与Forest-DNDC模型模拟进行对比分析,结果表明,模型能够较好地模拟林地土壤N2O排放.2005和2006年模型模拟的土壤N2O年平均排放速率为15.02,14.03μg/(m2·h),分别为实际观测值的85.7%和87.5%.2005和2006年的实际观测值与模型模拟值之间差异均不显著(P>0.05),模拟有效系数分别为0.56和0.51.以2005年降雨量和气温为基准利用模型进行情景分析,结果表明,本地区降雨量在±30%范围内变化时,林地土壤N2O排放量的变化幅度不超过25%;气温在±3℃范围内变化时,林地土壤N2O排放量的变化幅度不超过10%.
英文摘要	Soil N2O efflux in a mixed forest plantation of Alnus cremastogyne and Cupressus funebris was measured by closed chamber chromatographic technique from 2005 to 2006 in the central Sichuan Basin.Simulations of N2O emissions revealed that field observations and model predictions fitted well for seasonal patterns of both years.The simulation of mean soil N2O emission rate were 15.02μg/(m2?h) and 14.03μg/(m2·h), which accounted for 85.7% and 87.5% of field measurements in 2005 and 2006, respectively.There were no significant differences between predicted and measured N2O fluxes both in 2005 and 2006.The modeling efficiency was 0.56 and 0.51 in 2005 and 2006, respectively.The results obtained from both sensitivity analysis and validations with field data sets indicated that Forest-DNDC could be successfully used to predict N2O emissions in this forest sites.In comparison with the precipitation and air temperature in 2005, changes in precipitation by ±30% could only change the N2O fluxes by less than 25%, and changes in air temperature by ±3℃ could only change the N2O fluxes by less than 10%.
资助信息	国家自然科学基金资助项目(40571093);国家“973”项目(2005CB121108)
语种	中文
公开日期	2010-08-26
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/1618]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
推荐引用方式 GB/T 7714	王艳强,朱波,高美荣,等. 四川桤柏混交林土壤N_2O排放的实测与模拟[J]. 中国环境科学,2009,29(3):242-247.
APA	王艳强,朱波,高美荣,&王小国.(2009).四川桤柏混交林土壤N_2O排放的实测与模拟.中国环境科学,29(3),242-247.
MLA	王艳强,et al."四川桤柏混交林土壤N_2O排放的实测与模拟".中国环境科学 29.3(2009):242-247.