Effects of Ecological Restoration Patterns on Diurnal Variation of CO<sub>2</sub> Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City

ZHOU Yuzhi; WANG Fang; CHEN Xiaoyang; CHEN Min; LIU Benle

doi:10.13961/j.cnki.stbctb.2016.06.007

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Effects of Ecological Restoration Patterns on Diurnal Variation of CO₂ Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City

- Effects of Ecological Restoration Patterns on Diurnal Variation of CO₂ Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City
- Bulletin of Soiland Water Conservation Vol. 36, Issue 6, Pages: 40-46(2016)
- 作者机构：
  
  1. 安徽理工大学地球与环境学院,安徽,淮南,232001
  2. 安徽省煤炭勘探工程技术研究中心,安徽,宿州,234000
  3. 中国科学技术大学地球和空间科学学院,安徽,合肥,230026
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.06.007
  CLC：
- Published：2016
- 稿件说明：
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ZHOU Yuzhi, WANG Fang, CHEN Xiaoyang, et al. Effects of Ecological Restoration Patterns on Diurnal Variation of CO₂ Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 40-46.
DOI：

ZHOU Yuzhi, WANG Fang, CHEN Xiaoyang, et al. Effects of Ecological Restoration Patterns on Diurnal Variation of CO₂ Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 40-46. DOI： 10.13961/j.cnki.stbctb.2016.06.007.

摘要

[目的

]

探讨淮南矿区不同生态修复模式（植被类型和覆土厚度）对土壤CO

通量的影响，以期为该区域以及相似矿区的生态修复提供理论依据及参数。[方法

]

采用静态箱-碱液吸收法对淮南市采煤沉陷生态修复区土壤CO

通量进行动态测定，分析土壤CO

通量日变化特征，以及土壤呼吸速率对地表温度、地下5 cm土壤温度和土壤含水量的敏感性。[结果

]

不同生态修复模式下土壤CO

通量日变化格局均表现为单峰曲线，最高峰出现在14：00，最低值出现在6：00，其均值大小依次为：B区（灌木林） > C区（灌木林） > D区（乔木林） > A区（草地），且B，C与A区差异显著（p

0.05），其他区之间差异不显著（p>0.05）。不同覆土厚度下土壤表层CO

通量平均值的大小依次为：40-80 cm > 0-20 cm > 20-40 cm > 80-100 cm。其最大值和变幅的大小顺序也遵循平均值大小顺序。4种修复模式下土壤CO

通量与地下5 cm土壤温度、地表温度均呈指数方程关系，R

值分别在0.34~0.70，0.48~0.83之间，与土壤含水量呈二次方函数关系，R

值在0.08~0.44之间。[结论

]

不同植被类型条件下，土壤CO

通量大小表现为：灌木林>乔木林>草地；不同覆土厚度条件下，除了覆土40-80 cm的样地外，土壤CO

通量随覆土厚度的增加而减少。植被类型对土壤CO

通量的影响较覆土厚度显著。

Abstract

[Objective] To explore the effects of ecological restoration patterns in coal ming areas of Huainan City

including rehabilitation thickness of soil and reestablished vegetation type on soil CO2 flux

and to provide theoretical basis for ecological restoration patterns similar coal mining region.[Methods] Method of close static chamber-alkali absorption was used to measure the diurnal variation of reconstructing soil CO2 flux. Meanwhile

temperatures of soil surface and 5 cm depth and soil water content were measured and their influences on soil CO2 flux were analyzed in different ecological remediation patterns for coal mining district in Huainan City

Anhui Province.[Results] Diurnal variation of soil CO2 flux exhibited an obvious unimodal pattern during the whole observation period

with peak value at 14:00 and minimum flux at 6:00 for all of the ecological restoration models. The flux ranked at different revegetation districts as:B(brushwood) > C(brushwood) > D(arboreal forest) > A(grassland). Soil CO2 flux of B and C districts were significantly higher than that of A(p<0.05); no significant differences among others were observed(p>0.05). Soil CO2 flux with different rehabilitation thickness ranked as:40-80 cm > 0-20 cm > 20-40 cm > 80-100 cm

and their maximum and amplitude also followed this order. Significant relationships were found between soil temperature in 0 and 5 cm depth and soil CO2 flux

which could be described by exponential equation. R2 ranged from 0.34 to 0.70 and from 0.48 to 0.83

respectively. Relationship between soil CO2 flux and soil water content can be described by quadratic equation

with 0.08~0.44 R2 value.[Conclusion] Soil CO2 flux differed under different vegetation types

the highest occurred in brushwood[5.22 μmol/(m2·s)]

followed by arboreal forest[4.56 μmol/(m2·s)]

the lowest was grassland[3.89 μmol/(m2·s)].Except for 40-80 cm thickness

soil CO2 flux decreased with the increase of soil rehabilitation thickness. The influence of vegetation on soil CO2 flux was more significant than the one of soil rehabilitation thickness.

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⁰

Effects of Ecological Restoration Patterns on Diurnal Variation of CO2 Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City

DOI：10.13961/j.cnki.stbctb.2016.06.007

摘要

Abstract

关键词

Keywords

references

Effects of Ecological Restoration Patterns on Diurnal Variation of CO₂ Flux fromRehabilitated Soil of Coal Mining Areas in Huainan City