摘要
以徐州市柳新镇高潜水位采煤塌陷区林地、稻麦轮作、棉豆轮作复垦地为研究对象,并与相同利用方式的未塌陷地(林地、稻麦轮作、棉豆轮作)进行对比,分析了不同土地利用方式下复垦土壤的团聚体稳定性、颗粒分布、分形维数以及土壤容重、紧实度、孔隙度的变化特征,探讨了不同土地利用方式对复垦土壤的影响。结果表明:①在0～20 cm土层深度,与相同利用方式的未塌陷地相比,塌陷区复垦土壤耕作层的土壤黏粒、粗黏粒含量明显降低;与未利用的塌陷地相比,塌陷区复垦土壤的黏粒、粗黏粒含量均有所升高,其中以稻麦轮作地表层土壤的黏粒、粗黏粒含量最高;②不同土地利用方式对复垦土壤的团聚体结构性状均具有不同程度的改善作用,即直径大于0.25 mm的湿团聚体数量、湿团聚体平均质量直径增大,团聚体破坏率下降,稳定性增强,其中,稻麦轮作方式对复垦土壤团聚体结构的改善效果较好;③复垦土壤颗粒分布、分形维数、直径大于0.25 mm的湿团聚体数量、湿团聚体平均质量直径、团聚体破坏率及土壤容重、紧实度、孔隙度之间存在密切联系,土壤分形维数对土壤团聚体结构及其稳定性具有良好的指示作用。上述分析结果对于进一步制定高潜水位采煤塌陷区复垦土壤质量恢复措施有一定的参考价值。
Taking the reclamined soil area(forest land,rice-wheat rotation and cotton-soybean rotation)in the coal mining subsidence areas with high phreatic water level in Liuxin Town in Xuzhou City as an example,and compared with uncloapsed land(forest land,rice-wheat rotation and cotton-soybean rotation)with the same utilization methods,the variation characteristics of aggregate stability,particle distribution,fractal dimension and soil bulk density,compactness and porosity of reclaimed soil by different utilization methods are analyzed,besides that,effects of different land utilization methods on soil reclamation are discussed.The study results show that:①for 0~20 cm thickness of soil layer,compared with the non-subsidence area with the same utilization methods,contents of clay and coarse clay of cultivated layer of reclaimed soil are decreased significantly,compared with the unused subsidence land,contents of clay and coarse clay of reclaimed soil are both increased,in particular,contens of clay and coarse clay in the surface layer of rice-wheat rotation area are higher than others;②different land utilization methods have different degrees of improvement on the aggregate structure and properties of reclaimed soil,it can be described that it the number of wet aggregate larger than 0.25 mm in diameter and wet aggregate mean mass diameter(WMWD)are both increased,the percentage of aggregate destruction(PAD)will be decreased and stability of soil aggregate will be enhanced,improvement effects of rice-wheat rotation method to the structure of soil aggregate is better than others;③there is a close relationship between particles distribution,fractural dimension of reclaimed soil,number of wet aggregate larger than 0.25 mm,WMWD,PAD and soil bulk density,compactness and porosity,and soil fractal dimension is effective for indicating the structure and stability of soil aggregates.The above discussion analysis results could provide reliable reference for taking reclaimed soil quality restoration measures in the coal mining subsidence area with high phreatic water level.
作者
房莉
余健
方凤满
周光
汪梦甜
解进飞
Fang Li;Yu Jian;Fang Fengnian;Zhou Guang;Wang Mengtian;Xie Jinfei(School of Geography and Tourism ,Anhui Normal University,Wuhu 241003,China;Anhui Key Laboratorv of NaturalDisaster Pnx ess and Prevention ,Wuhu,241003,China)
出处
《金属矿山》
CAS
北大核心
2019年第3期182-188,共7页
Metal Mine
基金
国家自然科学基金项目(编号:41101529
31670615)
安徽师范大学国土资源与旅游学院科研团队资助项目(编号:Asdgl102)
安徽师范大学博士启动基金项目(编号:2016XJJ107)
安徽高校自然科学研究项目(编号:KJ2017A308)
山西省自然科学基金项目(编号:2015021125)
关键词
土地复垦
采煤塌陷地
复垦土壤
土壤团聚体
分形维数
高潜水位矿区
Land reclamination
Coal mining subsidence
Reclaimed soil
Soil aggregate
Fractal dimension
Mining area with high phreatic water level
