| 引用本文: | 韩笑,佘冬立,王洪德,等.滨海土壤团聚体分布和分形维数及其影响因子研究[J].灌溉排水学报,0,():-. |
| han xiao,she dongli,wang hongde,et al.滨海土壤团聚体分布和分形维数及其影响因子研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】土壤团聚结构是影响土壤肥力和质量的重要因素，研究滨海土壤团聚结构及其分形特征可为合理利用滩涂土地资源提供理论依据。【方法】以江苏省东台县条子泥垦区为研究对象，利用湿筛法测定土壤水稳性团聚体组成，探究垦区内荒地和水稻田土壤团聚体分形维数特征；利用因子分析法研究各理化因子对滨海土壤团聚体分形维数的影响。【结果】水稻种植后土壤大团聚体含量增加，分形维数降低。土壤团聚体分形维数与较大粒径团聚体含量呈显著负相关，而与较小粒径团聚体含量呈显著正相关。土壤平均重量直径和几何平均直径均与分形维数呈显著负相关。因子分析和相关性分析综合分析表明，土壤中Na+、Mg2+、Ca2+、K+、SAR（钠吸附比）、Cl-对研究区土壤团聚体分形维数贡献率较大，且与分形维数呈显著正相关。【结论】水稻种植能使滨海土壤中大团聚体含量增加，分形维数降低，团聚结构有所改善；因子分析表明，部分土壤理化性质对土壤团聚体分形维数贡献率较大且与其呈显著正相关。 |
| 关键词: 滨海土壤；水稳性团聚体；分形维数；因子分析 |
| DOI： |
| 分类号:S152.4+1；S152.4+5 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| The Distribution and Fractal Dimension of Coastal Soil Aggregates and its Influencing Factors |
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han xiao, she dongli, wang hongde, zheng yipeng
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College of Agricultural Sciences and Engineering, Hohai University
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| Abstract: |
| 【Objective】Soil aggregate structure is an important factor affecting soil fertility and quality. The study of coastal soil structure and fractal characteristics can provide theoretical basis for rational utilization of beach land resources. 【Method】Taking the soil of wasteland and rice field in Tiaozini reclamation area of Dongtai county, Jiangsu province as the research objects, the composition of soil water-stable aggregates was determined by wet sieving, and the fractal dimension characteristics of aggregates were investigated. The effect of physical and chemical factors on fractal dimension was studied by factor analysis. 【Result】The results showed that the content of large aggregates increased, the fractal dimension decreased and the structure of aggregates improved after rice planting. The fractal dimension of soil aggregates was negatively correlated with the content of larger size aggregates, while positively correlated with the content of smaller size aggregates. Soil mean weight diameter and geometric mean diameter were negatively correlated with fractal dimension. Factor analysis and correlation analysis showed that Na+、Mg2+、Ca2+、K+、SAR and Cl- contributed significantly to the fractal dimension of soil aggregates in the study area, and showed a significant positive correlation with the fractal dimension.【Conclusion】Rice planting can increase the content of large aggregates in the coastal soil, reduce the fractal dimension, and improve the agglomeration structure; factor analysis shows that the physical and chemical properties of some soils have a large contribution rate to the fractal dimension of the soil aggregates and are significantly Positive correlation. |
| Key words: coastal soil; water stable aggregates; fractal dimension; factor analysis. |
