【摘要】 以宁化县紫色土侵蚀区3种植被恢复模式（林果草模式、油茶模式、乔灌草模式）为研究对象,以未治理的裸露荒地（CK₂）、无明显水土流失的林分（CK₁）作为恢复前后的参照,研究土壤团聚体和理化性质的变化,分析3种植被恢复模式的优劣。结果表明:与CK₂相比,3种植被恢复模式>0.25 mm水稳性团聚体含量均显著提高,促进土壤从微小团聚体向大团聚体转变,土壤容重降低,孔隙度增加,土壤有机碳含量提高,以乔灌草和林果草模式为最优,但这2种模式差异不明显;植被恢复后的紫色土团聚体破坏率（PAD）和分形维数（D）值均有降低,团聚体平均重量直径（MWD）值明显增加,以乔灌草模式的变化幅度最大,表明该模式改善土壤结构的效果优于其它模式,其土壤结构较为稳定。相关分析表明,水稳性团聚体稳定性与土壤粒径、容重及孔隙度有显著相关性。更多还原

【Abstract】 The differences of aggregates and physicochemical properties in purple soil erosion area in Ninghua County of Fujian Province were studied to select a better pattern among the three vegetation restoration patterns. Three kinds of vegetation restoration patterns（ forest-garden-grass pattern,Camellia oleifera pattern and arbor-shrub-grass pattern） were selected as the research object,the uncovered wasteland（ CK₂） and the stand which have no significantly soil erosion（ CK₁） were selected as reference before and after recovering. The results show that the water stable soil aggregates（ > 0. 25 mm） among all vegetation restoration patterns were obviously increased compared with CK₂,which could lead to transfer from micro-aggregates changed into macro-aggregates,decreased in the soil bulk density and increased in porosity and soil organic carbon. The restoration effects of forest-garden-grass and arbor-shrubgrass pattern were better than Camellia oleifera pattern,the differences between the two patterns were no obvious. The percentage of aggregate disruption（ PAD） and fractal dimension（ D） were decreased,while mean weight diameter（ MWD） significantly increased after vegetation restoration. The forest-garden-grass pattern had the largest variation range,which is a best pattern among three vegetation restoration patterns in improving soil structure. Correlation analysis showed that there were significant correlations between water stable soil aggregates and soil particle size,and between the soil bulk density and porosiuy.更多还原