复垦模式对采煤沉陷区土壤团聚体有机碳分布特征的影响

发布时间：2019-01-24 07:36

【摘要】：研究不同复垦模式对采煤沉陷区复垦土壤团聚体有机碳分布特征的影响,为选择适宜的复垦植被及培肥沉陷区土壤肥力提供理论依据。在神府东胜采煤沉陷区设置4种复垦模式(对照、文冠果、欧李和长柄扁桃复垦模式),分析土壤0-20cm和20-40cm两个土层机械稳定性、水稳定性团聚体有机碳以及有机碳库的构成。结果表明:文冠果植被模式提高了0-20cm表层土壤各粒级机械稳定性团聚体中有机碳的含量,欧李植被模式提高了下层土壤(20-40cm)中2-0.25mm和0.25-0.05mm机械稳定性团聚体有机碳含量,欧李和长柄扁桃植被模式对2mm和0.05mm水稳性团聚体有机碳形成有明显促进作用。三种复垦模式中促进作用大小顺序为欧李文冠果长柄扁桃。根据有机碳物理分组方法,将有机碳分为粗颗粒有机碳(c POM)、微团聚体的有机碳(m M)和粉黏粒有机碳(s+c_M),文冠果植被模式显著增加了0-20cm表层土壤19.03%的s+c_M组分有机碳,而欧李却增加了表层c POM组分的有机碳含量。下层土壤中,三种植被模式都明显增加了c POM组分的有机碳含量,以文冠果增加幅度最大。综合三种不同复垦方式,以文冠果和欧李对团聚体有机碳的贡献较大,结合当地生长条件以及植被的长势,文冠果长势优于欧李,在后续复垦植被的选择上可以选择文冠果,值得推广应用。
[Abstract]:The effects of different reclamation models on the distribution of organic carbon in reclaimed soil aggregates in coal mining subsidence areas were studied in order to provide a theoretical basis for the selection of suitable reclamation vegetation and soil fertility in fertilizing subsidence areas. Four reclamation models were set up in Dongsheng coal mining subsidence area of Shenfu (control, Amur, Eulis and almond). The mechanical stability of soil 0-20cm and 20-40cm were analyzed. Composition of organic carbon and organic carbon pool of water stable aggregates. The results showed that the vegetation pattern increased the content of organic carbon in the mechanical stability aggregates of surface soil of 0-20cm. The organic carbon content of 2-0.25mm and 0.25-0.05mm mechanical stable aggregates in the subsoil (20-40cm) was increased by the Euclidean vegetation model. The vegetative pattern of Euclius and Almond promoted the formation of organic carbon of 2mm and 0.05mm water stable aggregates. Among the three models, the order of promotive effect was the long stalked almond. According to the physical grouping method of organic carbon, organic carbon is divided into organic carbon (m M) of coarse organic carbon (c POM), microaggregate and powder clay organic carbon. The vegetation pattern increased the organic carbon content of 0-20cm surface soil by 19.03%, while that of Euclio increased the content of C POM component in the surface layer. In the lower soil, the organic carbon content of c POM was increased obviously by three vegetation models, and the content of C POM was the largest in the three vegetation models. In combination with three different reclamation methods, the contribution to organic carbon of aggregates was greater in Amur and Eulis. Combining with the local growth conditions and vegetation growth, the growth of Amur was superior to that of Eucalyptus oleifera, and it could be selected in the selection of subsequent reclaimed vegetation. It is worth popularizing and applying.
【作者单位】：内蒙古农业大学教务处;内蒙古农业大学草原与资源环境学院;
【基金】：国家自然科学基金项目(41301605) 内蒙古自治区高等学校科学研究项目(NJZY13069)资助
【分类号】：S153.6

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