干旱区生态环境知识资源中心(Arid): 半干旱区不同土地利用方式下土壤呼吸特征

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	半干旱区不同土地利用方式下土壤呼吸特征
其他题名	Soil Respiration Characteristics Under Different Land Use Patterns in Semi-arid Area
	高金芳; 周波; 马涛; 张峰; 董彦丽; 王彦武; 于惠
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2017
卷号	24 期号:2 页码:89-93
中文摘要	采用动态密闭气室红外CO_2分析法测定了盐碱地、撂荒地和苜蓿地三种土地利用方式下的土壤呼吸速率,并结合水热因子,对不同土地利用方式下土壤呼吸速率的差异性以及其和温度、含水量之间的关系进行了分析。结果表明:三种土地利用类型土壤呼吸速率日变化均呈现单峰型曲线,与气温变化趋势一致,一天中气温最高时的土壤呼吸速率均显著高于其他时间;不同土地利用方式土壤呼吸与水热因子均呈正相关,采用线性关系式来分析土壤呼吸速率与土壤水分含量的关系。不同土地利用方式下土壤呼吸速率与近地面气温、不同深度土壤温度的关系可以用指数方程得到较好的拟合(p<0.05),撂荒地土壤呼吸的温度敏感性系数Q_(10)值变化较大,从而对土壤温度的响应更为敏感,且不同深度土壤的Q_(10)值存在较大差异,盐碱地和苜蓿地不同土层的Q_(10)值均在2.0左右变化,与全球Q_(10)的平均水平接近。盐碱地、撂荒地和苜蓿地土壤呼吸与土壤温度和湿度的双变量模型关系显著,比相应的单变量模型更好地解释了土壤呼吸变异。
英文摘要	Soil respiration rates under the saline land,abandoned land and Medicago sativa land were measured by the closed-IRGA infrared CO_2 method,the differences in soil respiration in different land use patterns and the relationships between soil respiration,soil temperature and soil moisture were analyzed.The results showed that diurnal changes of soil respiration presented single peak curves and the changes of air temperature followed a similar trend,the soil respiration reached the maximum values when the soil temperature was close to the maxsimum;there were positive correlations between soil respiration and soil moisture,soil temperature under different land use patterns,the relationship between soil respiration and soil moisture content was linear.The exponential equation could present the relationship between soil respiration and near-surface air temperature,soil temperature at different depths better(p<0.05),the significant variation of the Q_(10) of soil respiration of abandoned land was observed,illustrating that the soil respiration was more sensitive to soil temperature,the values of Q_(10) were significantly different in different soil depths;the values of Q_(10) in saline land and Medicago sativa land at different soil depths were around 2.0,which was closed to the global average value.A two-variable soil respiration model(soil temperature and soil moisture)could explain the variations of soil respiration much better than mono-variable model under saline land,abandoned land and Medicago sativaland.
中文关键词	土地利用方式 ; 土壤呼吸 ; 盐碱地 ; 半干旱区
英文关键词	land use patterns soil respiration saline land semi-arid area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5930070
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236699
作者单位	甘肃省水土保持科学研究所, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	高金芳,周波,马涛,等. 半干旱区不同土地利用方式下土壤呼吸特征[J],2017,24(2):89-93.
APA	高金芳.,周波.,马涛.,张峰.,董彦丽.,...&于惠.(2017).半干旱区不同土地利用方式下土壤呼吸特征.水土保持研究,24(2),89-93.
MLA	高金芳,et al."半干旱区不同土地利用方式下土壤呼吸特征".水土保持研究 24.2(2017):89-93.