[1]徐越,巩闪闪,赵佳宝,等. 华北石质山区坡位对栓皮栎人工林土壤温室气体排放的影响[J].西北林学院学报,2019,34(3):1-7.[doi:10.3969/j.issn.1001-7461.2019.03.01]
　XU Yue,GONG Shan-shan,ZHAO Jia-bao,et al. Effect of Slope Position on Soil Greenhouse Gases Emissions under Quercus variabilis Artificial Forest in Rocky Mountainous Area of Northern China[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2019,34(3):1-7.[doi:10.3969/j.issn.1001-7461.2019.03.01]
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 华北石质山区坡位对栓皮栎人工林土壤温室气体排放的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第34卷
期数:
2019年第3期
页码:
1-7
栏目:
出版日期:
2019-05-31

文章信息/Info

Title:
 Effect of Slope Position on Soil Greenhouse Gases Emissions under Quercus variabilis Artificial Forest in Rocky Mountainous Area of Northern China
文章编号:
1001-7461(2019)03-0001-07
作者:
 徐越; 巩闪闪; 赵佳宝; 朱龙飞; 孔玉华*
 （河南农业大学 林学院，河南 郑州 450002）
Author(s):
 XU Yue; GONG Shan-shan; ZHAO Jia-bao; ZHU Long-fei; KONG Yu-hua*
 (College of Forestry,Henan Agricultural University,Zhengzhou 450002,Henan,China)
关键词:
 ; 栓皮栎人工林; 坡位; 土壤累积CO2排放量; 土壤累积N2O排放量; 土壤累积CH4吸收量
Keywords:
Quercus variabilis artificial forest;  slope position;  soil cumulative CO2 emission;  soil cumulative N2O emission;  soil cumulative CH4 absorption
分类号:
S792.18
DOI:
10.3969/j.issn.1001-7461.2019.03.01
文献标志码:
A
摘要:
 山地及丘陵地带的坡位变化对温室气体的排放具有重要影响且存在很大的不确定性，选取华北石质山区不同坡位栓皮栎人工林下土壤为对象，采用室内培养法将不同坡位过筛土壤含水率调至60%的田间持水量（WHC）并培养256 h，测定分析了土壤温室气体累积排放/吸收量、土壤理化性质及其相关性。结果表明，该地区不同坡位土壤整体表现为CO2、N2O的源，CH4的汇。坡位变化通过改变栓皮栎人工林植被的生长状况以及林下土壤的物理结构、速效养分和矿质氮含量的分布，间接影响了土壤温室气体的排放与吸收。受土壤矿质氮和速效养分含量等影响，土壤累积CO2排放量呈坡上＞坡下＞坡中的趋势，累积N2O排放量与累积CH4吸收量均呈坡上＞坡中＞坡下的趋势，坡上土壤温室气体增温潜势显著高于坡下与坡中土壤（P＜0.05）。相关性分析表明，土壤累积CO2排放量与土壤硝态氮（NO3--N）含量显著正相关（P＜0.05），累积N2O排放量与土壤容重（BD）显著正相关，累积CH4吸收量与土壤pH、铵态氮（NH4+-N）、全氮（TN）及溶解性有机碳（DOC）显著相关，且累积CO2排放量与累积N2O排放量呈显著正相关。因此，在该地区山地及丘陵地带进行人工林种植并评估土壤固碳效应时，应当高度重视坡上土壤温室气体累积排放与吸收的变化。
Abstract:
 Slope position change has an important impact on greenhouse gas (GHG) emissions and existed great uncertainty for mountainous and hilly areas.In this study,we selected different slope position soils under Quercus variabilis artificial forest in the rocky mountainous area of northern China as research materials.Soil cumulative greenhouse gases emissions and absorptions,soil physicochemical properties as well as their relations were analyzed by using the incubation experimental method for 256 h.The results showed that the soils under Q.variabilis artificial forest tended as the source for CO2 and N2O,and the sink for CH4.The slope position directly affected soil physical structure,the distributions of available nutrients and mineral nitrogen under Q.variabilis artificial forest,thus indirectly affected the emission and absorption of greenhouse gases.Affected by soil mineral nitrogen and available nutrient content,the soil cumulative CO2 emission was summit (SM)>foot slope (FS)>shoulder (SH); the cumulative N2O emission and cumulative CH4 absorption were SM>SH>FS,the global warming potential of SM soils was significantly higher than FS and SH soils (P＜0.05).From correlation analysis between soil cumulative GHG emissions and soil properties,soil cumulative CO2 emission showed positive correlation with NO3--N (P＜0.05),soil cumulative N2O emission showed positive correlation with BD,soil cumulative CH4 absorption showed positive correlation with pH,NH4+-N,TN and DOC,besides,cumulative CO2 emission also showed a positive correlation with N2O emission.Therefore,when planting forests and assessing soil carbon sequestration in mountainous and hilly areas of the region,the changes in cumulative emissions and absorption of greenhouse gases on the slopes should be given high priority.

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备注/Memo

备注/Memo:
 收稿日期：2018-09-07修回日期：2018-12-05
基金项目：国家自然科学基金(41501331)。
作者简介：徐越，男，硕士在读，研究方向：土壤碳氮循环。E-mail:xy0116@126.com
*通信作者：孔玉华，女，博士，讲师，硕士生导师，研究方向：土壤碳氮循环与全球气候变化。E-mail:kyh034@hotmail.com
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