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植被恢复对黄土区煤矿排土场土壤团聚体特征的影响
Authors
党廷辉
唐骏
+3 more
徐娜
文月荣
薛江
Publication date
1 January 2016
Publisher
Abstract
目前关于植被恢复对排土场土壤团聚性的影响还不清楚,以植被恢复下黄土区露天煤矿排土场为研究对象,采用湿筛法 测定了排土场土壤水稳性团聚体组成,研究了植被恢复类型( 草地、灌木) 和排土场地形( 平台、边坡) 对土壤团聚体特征的影 响。结果表明: 植被恢复促进了排土场水稳性团聚体的形成,平台0—20 cm 土层水稳性大团聚体数量( R0. 25 ) 、平均重量直径 ( MWD) 和几何平均直径( GMD) 分别达到31. 1%,0. 70 mm 和0. 26 mm,边坡分别达到13. 3%,0 . 37 mm 和0. 17 mm,均显著高 于裸地,分形维数( D) 在平台和边坡分别为2. 91 和2. 96,均显著低于裸地; 平台土壤团聚性要好于边坡,草地对于平台土壤团 聚结构改良效果较好,而灌木对于边坡改良效果较好; 排土场土壤有机碳和粘粒含量均与土壤团聚体指标有显著相关性。植被 恢复提高了排土场土壤团聚性,植被恢复类型和地形对排土场土壤团聚体特征有显著影响。</p
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 12/06/2019