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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
唐骏1; 党廷辉1,2; 薛江2; 文月荣2; 徐娜1
2016
Source Publication生态学报
Volume36Issue:16Pages:5067-5077
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。

Other Abstract

Soil aggregate structure is an important factor affecting soil fertility and erodibility. Reports have suggested that
vegetation restoration may affect water-stable soil aggregates,but few studies have assessed vegetation restoration in the
mining area on the Loess Plateau. This study was performed in the Heidaigou opencast coal mine dump of the Loess
Plateau,which has been restored by vegetation reconstruction for 18 years. To study the effects of vegetation types and
landforms on dump soil aggregate characteristics,we assessed three vegetation types ( grassland,shrubland,and bare land)
and two landforms ( platform and slope) with 6 treatments and 126 samples. The water-stable soil aggregate composition was
analyzed by wet sieving. The aggregates were separated into six size classes: > 5 mm,5—2 mm,2—1 mm,1—0. 5 mm,
0. 5—0. 25 mm,and < 0. 25 mm. Macro-aggregate content ( R0. 25
) ,mean weight diameter ( MWD) ,geometric mean
diameter ( GMD) ,and fractal dimension ( D) were used as evaluation indexes. Soil particle size distribution was
determined by an MS2000 laser granularity analyzer. Soil organic carbon ( SOC) content was determined by potassium
dichromate volumetry. Results showed that vegetation restoration promoted the formation of water-stable soil aggregates. The
R0. 25
,MWD,and GMD of the 0—20 cm soil layer were significantly higher in revegetated land than in bare land on both
platforms and slopes. The R0. 25
,MWD,GMD,and D in the 0—20 cm soil layer of revegetation land were 31. 1%,0. 70
mm,0. 26 mm,and 2. 91,respectively,on platforms,and 13. 3%,0. 37 mm,0. 17 mm,and 2. 96,respectively,onslopes. The soil aggregate quality on the plat form was better than on the slope. Artificial grassland had more significant
improvement in soil aggregate quality than the shrubland on the platform of the dump,but the shrubland was better on the
slope. The soil aggregate quality was lower in the surface layer than sub-surface layer on the platform. SOC content and soil
clay content were significantly related to soil aggregate quality. Higher SOC content was noted with vegetation restoration on
the platform than on the slope. The distribution of SOC content changed in the order grassland > shrubland > bare land on
the platform,but in the order shrubland > grassland > bare land on the slope. The clay,slit,and sand contents,
respectively,averaged 10. 52%,54%,and 35. 48% on the platform and 7. 68%,42. 82%,and 49. 50% on the slope.
Significant correlations were noted between SOC content and soil aggregate indexes aswellas between soil clay content and
soil aggregate indexes. Correlation analysis showed that water-stable soil aggregate properties were positively correlated with
SOC and soil clay. Further,soil clay promoted the formation of water-stable soil aggregates,while the high SOC increased
the particle size of water-stable soil aggregates and changed their size distribution. Our results suggested that soil aggregate
quality improved significantly after 18 years of vegetation restoration,and vegetation types and landforms had significant
influences on soil aggregate properties in this mining area on the Loess Plateau. In addition,our results showed the positive
effects of vegetation restoration on water stability and soil structure of an opencast coal mine dump on the Loess Plateau,
which reduced soil erosion and improved soil quality in this region.

Keyword植被恢复 排土场 土壤团聚体 分形维数
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8707
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所
2.西北农林科技大学资源环境学院
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
唐骏,党廷辉,薛江,等. 植被恢复对黄土区煤矿排土场土壤团聚体特征的影响[J]. 生态学报,2016,36(16):5067-5077.
APA 唐骏,党廷辉,薛江,文月荣,&徐娜.(2016).植被恢复对黄土区煤矿排土场土壤团聚体特征的影响.生态学报,36(16),5067-5077.
MLA 唐骏,et al."植被恢复对黄土区煤矿排土场土壤团聚体特征的影响".生态学报 36.16(2016):5067-5077.
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