摘要
地貌、地形、土壤肥力状况是采煤沉陷区植被恢复的重要影响因素。神东矿区活鸡兔、补连塔两个采煤沉陷区位于黄土丘陵沟壑区,地形起伏变化大,其表土类型为风沙土,0~90cm深度的土壤机械组成粗,质地差,土壤p H值呈微碱性,有机质、速效氮、磷、钾含量十分缺乏,不同立地类型之间及相同立地类型不同层次之间土壤肥力水平差异较大。土壤肥力水平低、有效土层瘠薄是沉陷区土壤共同存在的问题,也是导致植被生产能力低下的主要原因,沉陷区植被建设必须培肥土壤。本文以沉陷区地貌、坡度、覆沙厚度为主导因子,采用聚类分析法划分立地类型,进而确定不同小区植被配置模式,而后对不同复垦小区土壤背景肥力特征进行分析和评价。提出了结合不同植被配置模式和土壤背景肥力特征,因地制宜的分区培肥土壤的技术方法。
Landform,terrain and soil fertility are important influential factors of vegetation restoration at the excavated coal pits.Huojitu and Bulianta excavated coal pits of Shengdong Diggings lie in hilly and gully regions on the loess plateau. Intopographic relief had great variation and surface soil type was sandy soil. The mechanical composition of soil in the depth of 0—90cm was coarse,the texture of soil was low,p H value of soil shows alkalescence,the contents of organic matter,nitrogen,phosphorus and potassium were quite absence in the soil. The difference of fertilizer level was relatively large in different soil layers of different and same site types.The fertilizer level in the soil was low,and the general question of soil layer in the pit was barren,which was also main reason leading to low productivity of the vegetation,so soil reclamation and vegetation construction must do soil cultivation in excavated pits. Site types were divided using clustering analysis based on terrain,gradient and sand＇s thickness at the pit and reclamation areas were classified mainly by different vegetation configuration mode,then the soil fertilizer characteristic was analyzed and evaluated. The technical measures that improving regional reclamation and soil cultivation were put forward according to different vegetation configuration mode and soil background fertilizer character.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2015年第3期61-69,共9页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
林业公益性行业专项(201104002-5)
内蒙古农业大学科技创新团队资助计划(NDTD2010-11)
关键词
土壤培肥
采煤沉陷区
聚类分析
立地类型
Soil cultivation
excavated coal pits
clustering analysis
site types
