不同林地恢复模式下露天煤矿排土场土壤有机碳分布特征

发布时间：2018-04-13 23:20

本文选题：露天煤矿排土场 + 林地恢复模式　；参考：《应用生态学报》2016年01期

【摘要】：研究露天煤矿排土场6种不同林地植被恢复模式和撂荒地0~100 cm土层土壤有机碳(SOC)含量和储量的分布特征,分析其差异性及其影响因素.结果表明:不同林地0~10 cm土层SOC含量比撂荒地(1.92g·kg~(-1))显著提高23.8%~53.2%,10~20 cm土层比撂荒地(1.39g·kg~(-1))显著提高5.8%~70.4%,20 cm土层以下与撂荒地相比差异不大;各土层SOC含量随土层深度增加而逐渐减小,表层(0~20 cm)减小幅度大于深层(20~100 cm).不同林地SOC储量在表层明显高于深层,随土层深度增加而逐渐减小.0~100 cm土层林地SOC储量比撂荒地(17.52 t·hm~(-2))提高18.1%~42.4%,其中,紫穗槐林地SOC储量最高,达24.95t·hm~(-2),明显高于其他林地类型,灌木林地SOC储量比乔木高12.4%.林地凋落物、细根生物量和土壤水分都与排土场SOC呈显著正相关.综上所述,不同人工林地恢复模式显著提高了排土场0~100 cm土层SOC,尤其对表层SOC提高效果明显,但排土场SOC与原地貌相比差距仍较大.从提高排土场SOC角度优先推荐紫穗槐为主要林地植被.
[Abstract]:The distribution characteristics of soil organic carbon (SOC) contents and reserves in 6 different forest vegetation restoration models and in 100 cm soil layer of abandoned land were studied in open pit coal mine dump. The differences and influencing factors were analyzed.The results showed that the content of SOC in 10 cm soil layer of different forest land was significantly higher than that in abandoned land (1.92 g / kg 路kg ~ (-1))) and the content of SOC in different soil layers was significantly higher than that in abandoned land (1.39 g 路kg ~ (-1) ~ (-1)), and the content of SOC in each soil layer decreased gradually with the increase of soil depth.The decrease of the surface layer is larger than that of the deep layer (20 ~ 100 cm ~ (-1)).The SOC reserves of different forest land were obviously higher than those of deep layer, and gradually decreased with the increase of soil depth. The SOC reserves of woodland in 100cm soil layer decreased gradually compared with that of abandoned land (17.52 t / hm ~ (-2)). The SOC reserves in Amorpha fruticosa forest land were the highest (24.95 t / m ~ (-2)), which were significantly higher than those in other forest land types.The reserves of SOC in shrub land were 12. 4% higher than that in trees.Litter, fine root biomass and soil moisture were positively correlated with SOC in the dump.To sum up, the restoration models of different plantations significantly increased SOC in 0 ~ 100cm soil layer of dump, especially to surface SOC, but the gap between SOC and original landform was still large.Amorpha fruticosa was recommended as the main forest vegetation in order to improve the SOC of dump.
【作者单位】：西北农林科技大学资源环境学院;中国科学院水利部水土保持研究所;
【基金】：中国科学院西部行动计划项目(KZCX2-XB3-13)资助~~
【分类号】：S714

【参考文献】