安太堡矿区不同植被恢复模式对土壤活性有机碳的影响

发布时间：2018-05-17 18:31

  本文选题：安太堡露天煤矿 + 植被恢复　； 参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：我国当前对于矿区复垦土地有机碳的研究多集中于总有机碳,而对其中具有特殊含义又十分重要的活性碳的部分则研究较少。事实上,活性有机碳相较于总有机碳,更能敏感地反映出外界环境变化对土壤碳库的影响机理,对土壤微生物的活动、植被群落的生长发育以及区域生态系统碳储量的增加都具有十分重要的作用。本文通过对安太堡矿区不同植被恢复模式下0-60cm土壤活性有机碳(333、167、33mmol/L浓度的KMn O4分别提取出的低、中、高活性的易氧化有机碳)的分布变化情况及其与土壤养分和凋落物的相关性进行研究,可以及时有效地监测矿区复垦土壤活性有机碳库的变化情况及其更新程度,对矿区植被恢复碳效应的研究具有最直接的意义。本文的研究结果主要包括以下内容:(1)不同植被恢复模式下土壤总有机碳和各活性有机碳均随土层深度的加深而递减,总有机碳(0~50g/kg)低活性有机碳(6~100mg/kg)中活性有机碳(2~55mg/kg)高活性有机碳(0~5.4mg/kg),说明以333mmol/L KMn O4氧化的活性有机碳含量最高,对植被类型变化的响应也最敏感。植被恢复显著提升表层土壤的碳库活性,改善碳库的质量,以SⅣ(油松×刺槐)模式下的效果最好。总有机碳与各活性有机碳之间关系密切,活性有机碳很大程度上依赖于总有机碳,各活性有机碳均可以对不同植被恢复模式下土壤碳库的微小变化做出敏感有效的响应,其中以低活性有机碳表现最好。(2)植被恢复对提升矿区土壤全氮、全钾、有效磷的含量无显著性影响,对提升表层土壤速效钾和水解氮的含量具有显著性影响,可以有效改善矿区土壤的酸碱度,使土壤性质朝着良好的方向发展,以SⅣ(油松×刺槐)模式下的效果最好。各活性有机碳与理化性质间关系密切,以SHR(沙棘)模式下的相关性最好,其中低活性有机碳更能敏感地反映出土壤性质的微小变化。凋落物与土壤各活性有机碳间关系十分密切,以SⅣ(油松×刺槐)模式下的相关性最为显著。(3)矿区植被恢复的碳效应凸显,以SⅣ(油松×刺槐)模式的效果最好,所以安太堡矿区植被恢复要优先考虑油松×刺槐模式对于提升土壤碳库活性及质量的影响,其次兼顾配置其他植被模式,以实现矿区生态系统的健康稳定发展。
[Abstract]:At present, the research on organic carbon in mining area reclamation land is mostly focused on total organic carbon, but less on activated carbon which has special meaning and is very important. In fact, compared with total organic carbon, active organic carbon can more sensitively reflect the influence mechanism of external environment change on soil carbon pool and the activity of soil microorganism. The growth and development of vegetation community and the increase of carbon storage in regional ecosystem play an important role. In this paper, the low and middle concentrations of KMn O _ 4 extracted from 0-60cm soil active organic carbon (ROC) 333167 and 33mmol / L under different vegetation restoration models in Antaibao mining area were studied. Studies on the distribution of highly active and easily oxidized organic carbon (OOC) and its correlation with soil nutrients and litter can effectively and timely monitor the change of active organic carbon pool and the degree of regeneration of reclaimed soil in mining area. The study on carbon effect of vegetation restoration in mining area is of the most direct significance. The main results of this study are as follows: (1) soil total organic carbon (TOC) and active organic carbon (AOC) decrease with the depth of soil layer under different vegetation restoration models. Total organic carbon (TOC) 50 g / kg) of low active organic carbon (60 mg 路kg ~ (-1) active organic carbon ~ (2 +) ~ (55 mg 路kg ~ (-1) ~ (0.4 mg 路kg ~ (-1) 路kg ~ (-1), indicating that the content of active organic carbon oxidized by 333mmol/L KMn O _ (4) is the highest, and the response to the change of vegetation type is also the most sensitive. Vegetation restoration significantly enhanced the carbon pool activity of surface soil and improved the quality of carbon pool. The best effect was under the model of S 鈪，

本文编号：1902406