| 刘 晶，王 磊.豫西黄土丘陵区不同退耕地土壤大团聚体
的组成及其分形特征[J].广东农业科学,2015,42(19):48-54 |
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豫西黄土丘陵区不同退耕地土壤大团聚体
的组成及其分形特征 |
| Composition and fractal features of soil macro-aggregateunder different abandoned lands in theloess hilly region of West Henan |
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| DOI： |
| 中文关键词: 黄土丘陵 退耕 大团聚体 组成 分维数 |
| 英文关键词: loess hilly region abandoned land macro-aggregate composition fractional dimension |
| 基金项目:河南科技大学博士科研基金（09100687） |
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| 摘要点击次数: 1237 |
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| 中文摘要: |
| 选取退耕10 年左右的乔木林、灌木林、果园、人工草地及荒地，对表层土壤大团聚体的分布、稳
定性及其分形特征进行研究。结果表明，>2 mm 的团聚体在土壤团粒结构中占主导地位，灌木地、乔木地和荒
地土壤中2~5 mm 和1~2 mm 团聚体含量较耕地显著提高；灌木地、乔木地、果园、草地和荒地表层土壤中> 5
mm 和2~5 mm 两个粒级水稳性团聚体含量较耕地均显著提高。灌木林、乔木林、草地和荒地土壤中干筛和湿
筛团聚体的平均重量直径和几何平均直径较耕地均显著增加，分维数较耕地显著降低，这4 种退耕地土壤结
构显著改善，果园土壤结构的改善尚不明显。团聚体分维数能较好地描述土壤团聚体的分布状况且与土壤理
化性质关系密切。 |
| 英文摘要: |
| The distribution，stability and fractal features of topsoil macro-aggregate were studied for abandoned
arbor，shrub，orchard，grassland and wasteland about 10 years. The results showed that：> 2 mm aggregate dominated
in the soil aggregate structure，the 2-5 mm and 1-2 mm aggregate contents in shrub，arbor land and wasteland soil
increased significantly than those of the cultivated land；the contents of > 5mm and 2-5 mm water stable aggregate in
the arbor，shrub，orchard，grassland and wasteland in the topsoil significantly increased than those of cultivated land.
The mean weight diameter and geometrical mean diameter by dry sieving and wet sieving in the arbor，shrub，grassland
and wasteland significantly increased，but the fractal dimension decreased significantly than that of cultivated land，this
4 kinds of soil structurs were improved significantly，but the orchard soil structure improvement was not obvious. The
soil aggregate fractal dimension can describe the distribution of soil aggregate better and has close relationship with soil
physiochemical properties |
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