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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。
The effects of different reclamation modes on the distribution characteristics of organic carbon in reclaimed soil aggregates in coal mining subsidence areas were studied to provide a theoretical basis for selecting appropriate reclamation vegetation and soil fertility in subsidence areas. Four kinds of reclamation models (control, Wen Guan Guo, Ou Li and long-stem almond reclamation mode) were set up in Shenfu Dongsheng coal mining subsidence area. The mechanical stability of two soil layers 0-20cm and 20-40cm were analyzed. Water-stable aggregates of organic carbon and organic carbon pools. The results showed that the vegetation pattern of X. sorbifolia increased the content of organic carbon in the mechanical aggregates with mechanical stability at the grain size of 0-20 cm. The European-European vegetation pattern increased the content of 2-0.25 mm and 0.25- 0.05mm mechanical stability aggregates organic carbon content, the European plum and long-stem almond vegetation mode for> 2mm and <0.05mm water-stable aggregates of organic carbon formation has a significant role in promoting. The three kinds of reclamation mode to promote the role of the size of the order of the European Lee> Wen Guan Guo> long-handled almond. According to the organic carbon grouping method, the organic carbon was classified into c POM, m M and s c c, and the vegetation pattern of the plant was significantly increased Organic carbon of 19.03% s + c_M component of 0-20 cm surface soil was observed, while the content of organic carbon of c POM component of surface layer increased in European soil. In the lower soil, the three vegetation patterns significantly increased the organic carbon content of the c POM component, with the largest increase of the textual crown. Combining the three different ways of reclamation, the contribution of E. australis and O. pluvialis to the organic carbon of aggregates was larger. Compared with the growth of the vegetation, On the choice of Wen Guan fruit, it is worth promoting application.