干旱区生态环境知识资源中心(Arid): 风沙区采煤塌陷不同恢复年限土壤理化性质变化

Arid

	风沙区采煤塌陷不同恢复年限土壤理化性质变化
其他题名	Changes of Soil Physical and Chemical Properties Under Different Coal Mining Subsidence Years in Windy Desert Area
	王琦 1; 全占军 1; 韩煜 1; 付梦娣 1; 叶瑶 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2014
卷号	28 期号:2 页码:118-122,126
中文摘要	试验比较了未沉陷样地、沉陷后2a,7a,12a,17a样地不同土壤深度土壤含水量、孔隙度、有机质和土壤养分变化过程。结果表明:(1)沉陷后2a土壤含水量、孔隙度与未沉陷样地相比差异显著,土壤含水量变化主要受包气带水分运移影响,风蚀和水蚀因素是造成表层土壤孔隙度变化的主要原因;(2)40-50 cm土壤深度,沉陷后2a土壤有机质分解速率加快38% 左右;(3)沉陷后土壤全N质量分数和速效N含量显著低于未沉陷样地,流失率分别为20% 和80% 左右;(4)沉陷后土壤全P含量显著高于未沉陷样地,沉陷后2a,7a土壤速效P含量与未沉陷样地相比差异显著,流失率在65% ~75% 之间;(5)沉陷与未沉陷样地相比,土壤中全K质量分数和速效K含量差异不显著;(6)采煤塌陷对风沙区土壤养分影响远大于对土壤物理性质影响,沉陷后2~7a土壤含水量恢复至75% 左右,土壤孔隙度可以完成恢复,土壤 N、P元素在沉陷后12~17a才能逐步恢复。
英文摘要	Four communities were selected as experimental stands that had been subsidenced after 2a,7a,12a and 17a.A nearby no subsidenced stand was selected as a control stand.The aim of this study was to investigate the changes of soil water content,porosity,organic matter,soil nutrient in different soil depth.The results showed that:(1)Soil moisture content and porosity had significant difference between subsidence after 2a and no subsidence plots,soil moisture content change was mainly affected by the moisture migration in aerated zone,wind and water erosion factors were the main causes of surface soil porosity change;(2)Soil organic matter decomposition rate accelerated after subsidence 2aaround 38%;(3)After the subsidence,soil total N and available N content were significantly lower than that of the control sample,loss rate of around 20% and 80% respectively;(4)The total P content in soil after subsidence was significantly higher,available P in soil after subsidence 2a and 7a had no significant difference in subsidence area with the control stand,e-rosion rate was 65% ~75%;(5)Total K and the available K content had not significant changes in subsidence area;(6)Effects of mining subsidence on sandy soil nutrient were far greater than that on soil physical properties,soil moisture subsidence after 7arecovered to about 75%,soil porosity could be completed re-covery,N,P elements in soil could gradually restore after subsidence 12~17a.
中文关键词	采煤塌陷 ; 沉陷后年限 ; 土壤理化性质 ; 风沙区
英文关键词	mining subsidence years after subsidence physical and chemical properties of soil windy desert area
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:5241677
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231765
作者单位	1.中国环境科学研究院, 北京 100012, 中国; 2.南京农业大学, 南京, 江苏 210008, 中国
推荐引用方式 GB/T 7714	王琦,全占军,韩煜,等. 风沙区采煤塌陷不同恢复年限土壤理化性质变化[J],2014,28(2):118-122,126.
APA	王琦,全占军,韩煜,付梦娣,&叶瑶.(2014).风沙区采煤塌陷不同恢复年限土壤理化性质变化.水土保持学报,28(2),118-122,126.
MLA	王琦,et al."风沙区采煤塌陷不同恢复年限土壤理化性质变化".水土保持学报 28.2(2014):118-122,126.