干旱区生态环境知识资源中心(Arid): 水分条件和冻融循环对科尔沁沙地不同土地利用方式土壤呼吸的影响

Arid

	水分条件和冻融循环对科尔沁沙地不同土地利用方式土壤呼吸的影响
其他题名	Effects of soil moisture condition and freeze-thaw cycle on soil respiration of different land-use types in Horqin Sandy Land
	褚建民; 王琼; 范志平; 李法云; 孙学凯
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:6 页码:1399-1404
中文摘要	在东北半干旱地区的科尔沁沙地,秋冬与冬春季节由温度变化引起的土壤冻融对CO_2排放具有显著影响,研究水分和冻融的交互作用对土壤呼吸的影响具有重要意义。以科尔沁沙地樟子松疏林草地、农田和草地为研究对象,通过冻融模拟实验分析水分和冻融循环对不同土地利用方式土壤呼吸的影响。结果表明,水分条件、土地利用方式和冻融循环均对土壤呼吸影响显著。冻融前草地土壤呼吸显著大于疏林草地和农田,冻融期疏林草地土壤呼吸显著大于农田,而冻融后草地土壤呼吸速率显著大于疏林草地。80%田间持水量时3种土地利用方式的土壤呼吸速率显著大于60%田间持水量时土壤呼吸速率;在培养期内(20d),60%田间持水量时疏林草地、农田和草地的土壤CO_2释放量分别为21.535、19.908和25.037gCO_2·m~(-2),80%田间持水量时分别为26.407、29.447和36.246gCO_2·m~(-2)。
英文摘要	In Horqin Sandy Land,a semiarid region of Northeast China,soil freeze-thaw caused by the temperature change in late autumn,winter,and early spring has significant effects on soil CO_2emission,and thus,it is of significance to study the effects of the interaction between soil moisture content and freeze-thaw on soil respiration. Taking the silvopasture system,cropland, and grassland in Horqin Sandy Land as test objects,a simulation experiment was conducted to study the effects of soil moisture condition and freeze-thaw cycle on the soil respiration under different land use patterns. The results showed that soil moisture condition,freeze-thaw cycle,and land use pattern all had significant effects on soil respiration. Before freeze-thaw,the soil respiration rate was significantly higher in grassland than in silvopasture system and cropland. During freeze-thaw,soil respiration rate was higher in silvopasture system than in cropland. After freezethaw,soil respiration rate was significantly higher in grassland than in silvopasture system. When the soil moisture content was 80% of water-holding capacity (WHC),soil respiration rate was significantly higher than that when the soil moisture content was 60% of WHC. During the whole incubation period (20 days),the amount of soil CO_2emission from silvopasture system,cropland,and grassland under 60% of WHC was 21.535,19.908,and 25.037 g CO_2·m~(-2),and that under 80% of WHC was 26.407,29.447,and 36.246 g CO_2·m~(-2),respectively.
中文关键词	土壤呼吸 ; 冻融 ; 土地利用方式 ; 土壤水分
英文关键词	soil respiration freeze-thaw cycle land use pattern soil moisture
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:4852215
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378787
作者单位	褚建民, 中国林业科学研究院林业研究所, 北京 100091, 中国.; 王琼, 辽宁石油化工大学生态环境研究院, 抚顺, 辽宁 113001, 中国.; 范志平, 辽宁石油化工大学生态环境研究院, 抚顺, 辽宁 113001, 中国.; 李法云, 辽宁石油化工大学生态环境研究院, 抚顺, 辽宁 113001, 中国.; 孙学凯, 中国科学院沈阳应用生态研究所, 沈阳, 辽宁 110016, 中国.
推荐引用方式 GB/T 7714	褚建民,王琼,范志平,等. 水分条件和冻融循环对科尔沁沙地不同土地利用方式土壤呼吸的影响[J],2013,32(6):1399-1404.
APA	褚建民,王琼,范志平,李法云,&孙学凯.(2013).水分条件和冻融循环对科尔沁沙地不同土地利用方式土壤呼吸的影响.生态学杂志,32(6),1399-1404.
MLA	褚建民,et al."水分条件和冻融循环对科尔沁沙地不同土地利用方式土壤呼吸的影响".生态学杂志 32.6(2013):1399-1404.