IMHE OpenIR  > 山地表生过程与生态调控重点实验室
紫色土坡耕地退耕还林对土壤N_2O 排放的影响
Alternative TitleEffect of Returning Cropland to Forestland on N_2O Emissions from Sloping Purple Soil
柯韵1,2; 杨红薇1; 王小国2,3; 胡廷旭2,3,4; 刘韵2,3,4; 朱波2,3
Corresponding Author朱波
Source Publication农业环境科学学报
Other Abstract采用静态暗箱-气相色谱法对紫色土坡耕地常规施肥处理(CL)、坡耕地不施肥处理(CL-CK)和退耕15、30年的桤柏混交林地(FL15、FL30)的土壤N2O排放通量进行为期1年的观测,同时测定土壤温度、土壤湿度、土壤无机氮含量等。结果表明,观测期内CL、CL-CK、FL15与FL30的N2O平均释放速率分别是25.6、6.60、1.20、4.35μg N2O-N·m-2·h-1,CL小麦季N2O平均释放速率是18.0μg N2O-N·m-2·h-1,玉米季35.2μg N2O-N·m-2·h-1,CL土壤N2O排放速率显著高于CL-CK、FL15和FL30(P<0.01),且CL-CK高于FL15、FL30(P<0.01),FL30高于FL15(P<0.01)。CL、CL-CK、FL15和FL30全年的N2O排放量分别为1.01、0.400、0.050、0.310 kg N2O-N·hm-2。比较CL以及CL-CK的N2O排放总量,停止施氮的措施对土壤N2O排放的减排潜力达到0.610 kg N2O-N·hm-2。与CL-CK相比,FL15、FL30土壤N2O释放量分别减少0.350、0.090 kg N2O-N·hm-2,主要原因是退耕后土壤碳氮比升高,土壤无机养分、温度以及湿度等发生变化。;

Cropland is a large source of global N_2O emissions, while forestland emits much less N_2O. Thus, returning cropland to forestland would help reduce global N_2O emissions. Here static chamber-GC technique was used to compare soil N_2O emission fluxes from sloping cropland(CL) and forestland returned from cropland for 15 and 30 years. Soil temperature, moisture, nitrate(NO_3~- -N) and ammonia(NH_4~+ -N)nitrogen content in the soils were also recorded for one year. Results showed that average fluxes of soil N_2O from CL, CL-CK(CL-Check test), FL_(15) and FL_(30) (15 and 30 years old forest)were 25.6, 6.60, 1.20, and 4.35 mug N_2O-N·m~(-2)·h~(-1), respectively, with significantly higher N_2O emissions from CL than from CL-CK, FL_(15) and FL_(30) (P<0.01). The N_2O emissions from FL_(30) were also significantly higher than that from FL_(15) (P<0.01). Annual cumulative N_2O emissions from CL, CL-CK, FL_(15) and FL_(30) were respectively 1.01, 0.400, 0.050, and 0.310 kg N_2O-N·hm~(-2). The potential of N_2O mitigation by nitrogen fertilizer reduction was as high as 0.620 kg N_2O-N·hm~(-2). Compared with CL-CK, FL_(15) and FL_(30) reduced N_2O emissions by 0.350 and 0.090 kg N_2O-N·hm~(-2), respectively, may due to increases in soil carbon to nitrogen ratios and changes in soil properties.

Keyword紫色土 桤柏混交林地 坡耕地 退耕还林
Subject AreaS718.5
Indexed ByCSCD ; 北大中文核心
Funding Organization国家重点基础研究计划项目(2012CB417101) ; 国家自然科学基金项目(41271321)
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
柯韵,杨红薇,王小国,等. 紫色土坡耕地退耕还林对土壤N_2O 排放的影响[J]. 农业环境科学学报,2015,34(7):1398-1406.
APA 柯韵,杨红薇,王小国,胡廷旭,刘韵,&朱波.(2015).紫色土坡耕地退耕还林对土壤N_2O 排放的影响.农业环境科学学报,34(7),1398-1406.
MLA 柯韵,et al."紫色土坡耕地退耕还林对土壤N_2O 排放的影响".农业环境科学学报 34.7(2015):1398-1406.
Files in This Item:
File Name/Size DocType Version Access License
紫色土坡耕地退耕还林对土壤N_2O排放的(1037KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[柯韵]'s Articles
[杨红薇]'s Articles
[王小国]'s Articles
Baidu academic
Similar articles in Baidu academic
[柯韵]'s Articles
[杨红薇]'s Articles
[王小国]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[柯韵]'s Articles
[杨红薇]'s Articles
[王小国]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 紫色土坡耕地退耕还林对土壤N_2O排放的影响_柯韵.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.