| 吕刚,翟景轩,李叶鑫,王磊,王韫策.辽西北风沙地不同植物群落土壤入渗特性[J].干旱地区农业研究,2018,36(4):133~139 |
| 辽西北风沙地不同植物群落土壤入渗特性 |
| Soil infiltration characteristics of different plant community in sandy land of northwestern Liaoning |
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| DOI：10.7606/j.issn.1000-7601.2018.04.19 |
| 中文关键词: 辽西北风沙地 土壤入渗 土壤水分 植物群落 |
| 英文关键词:sandy land of northwestern Liaoning, soil infiltration, soil moisture, phytobiocoenose |
| 基金项目:国家自然科学基金”干旱胁迫下科尔沁沙地主要防护林树种CNP化学计量特征及其影响机制”（31400613） |
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| 中文摘要: |
| 采用野外双环入渗试验和室内土壤物理性质分析相结合的方法，研究辽西北风沙地不同植物群落（乔木林地、灌木林地、人工草地、荒草地）土壤入渗特征及影响因素。结果表明：不同植物群落的土壤初始入渗率、16 min入渗率、稳定入渗率和累计入渗量等土壤入渗特征值均表现为荒草地>人工草地>灌木林地>乔木林地；土壤入渗特征值与毛管孔隙度呈显著负相关，与饱和含水量、粉粒含量呈负相关，与土壤初始含水率、土壤容重、非毛管孔隙度、砂粒、粘粒含量呈正相关，但未达显著水平。不同植物群落下土壤入渗过程的拟合优度存在差异，Horton模型、G-P综合模型、Philip模型、Kastiakov模型的平均拟合优度依次为0.948、0.896、0.893、0.868，Horton模型相对误差为15.71%~68.61%，可作为辽西北风沙地不同植物群落土壤入渗过程的预测模型；主成分分析评价的土壤入渗能力排序为荒草地>人工草地>灌木林地>乔木林地，初始入渗率、稳定入渗率、16 min入渗率和累积入渗量的主成分方差累积贡献率为99.628%，较好地表达了土壤入渗能力。 |
| 英文摘要: |
| The method of field double ring infiltration test and indoor soil physical properties analysis was used to study the soil infiltration characteristics of different plant community(arbor forest land, shrub land, artificial meadow, wild meadow) in sandy land of northwestern liaoning. The results showed that soil infiltration characteristics such as initial infiltration rate, 16 min infiltration rate, stable infiltration rate and cumulative infiltration rate of different plant communities were all represented as wild grassland> artificial grassland> shrub forest land> arbor woodland. Soil infiltration characteristics are negatively correlated with capillary porosity and silt content, soil infiltration characteristics are negatively correlated with soil initial moisture content, soil bulk density, non capillary porosity, sand and clay content, but not significant. The goodness of fit of soil infiltration process under different plant communities exist difference. The average goodness of fit of Horton Model, G-P Model, Philip Model, Kastiakov Model in turn was 0.948,0.896,0.893,0.868. The relative error of Horton Model was 15.71%~68.61 %, which can be used as a prediction model for soil infiltration processes of different plant communities in sandy land of northwest liaoning. The ranking of soil infiltration capacity evaluated by principal component analysis is wasteland> artificial grassland> shrubbery> arbor woodland,The cumulative contribution rate of principal component variance of the initial infiltration rate of soil, the 16min infiltration rate of soil, the stable infiltration rate of soil and the cumulative infiltration was 99.628% , which better expressed the infiltration capacity of soil. |
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