干旱区生态环境知识资源中心(Arid): 辽西半干旱区森林土壤大孔隙特征研究

Arid

	辽西半干旱区森林土壤大孔隙特征研究
其他题名	A Study on Macropore Properties of Forest Soil in Semi-arid Region of Western Liaoning Province
	吕刚 1; 王洪禄 2; 黄龙 3
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2012
卷号	32 期号:5 页码:176-181
中文摘要	根据水分穿透曲线和Poiseulle方程,研究了辽西半干旱区8种植被类型下土壤大孔隙的半径范围、个数及分布情况。结果表明,不同植被下土壤大孔隙半径分布在0.5~2.3mm,加权平均半径在0.61~1.85mm,均值为0.95mm,均值为粗通气孔隙标准的近2倍,>1.4mm的特大孔隙仅为大孔隙总数的2.73%,0.5~1.4mm的孔隙占97.27%,表现出大半径孔隙少而小半径孔隙多的特点。不同植被下土壤大孔隙度在0.95%~5.24%,仅占土壤体积很小的一部分,但大孔隙平均半径与稳定出流速率和饱和导水率之间有显著线性相关关系,决定了稳定出流速率71%的变异和饱和导水率50%的变异。
英文摘要	The radius, number and distribution of soil macropores under eight types of vegetation in the semi-arid region of western Liaoning Province were investigated using water breakthrough curve and Poiseulle equation. Results showed that under the different vegetations, the radii of soil macropores ranged from 0.5 to 2.3 mm; weighted mean radii varied from 0.61 to1.85 mm; and the overall mean value was 0.95 mm, nearly two times the coarse aeration porosity standard. The macropores with the radius larger than 1.4 mm accounted for only 2.73% of total macropore number and betweenl.5 and 1.4 mm, 97.27%, which showed that large radius pores were more than small radius pores. Soil macroporosity under the different vegetations ranged from 0.95% to 5.24%, which means that soil macropores constituted a small portion of soil volume. However, the mean radius of soil macropores was significantly correlated with steady effluent rate and saturated hydraulic conductivity. The mean radius determined 71% variances of steady effluent rate and 50% of saturated hydraulic conductivity.
中文关键词	大孔隙 ; 水分穿透曲线 ; Poiseulle方程 ; 辽西半干旱区
英文关键词	soil macropore water breakthrough curve Poiseuille law semi-arid region of western Liaoning Province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4694977
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228579
作者单位	1.辽宁工程技术大学资源与环境工程学院, 阜新, 辽宁 123000, 中国; 2.铁岭市国土资源调查规划局, 铁岭, 辽宁 112000, 中国; 3.北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	吕刚,王洪禄,黄龙. 辽西半干旱区森林土壤大孔隙特征研究[J]. 北京林业大学,2012,32(5):176-181.
APA	吕刚,王洪禄,&黄龙.(2012).辽西半干旱区森林土壤大孔隙特征研究.水土保持通报,32(5),176-181.
MLA	吕刚,et al."辽西半干旱区森林土壤大孔隙特征研究".水土保持通报 32.5(2012):176-181.