SONG Aiyun,DONG Linshui,LIU Shirong,et al.Soil Infiltration Characteristics and Its Influencing Factors in Different Subalpine Meadow Communities[J].Research of Soil and Water Conservation,2018,25(03):41-45.
不同亚高山草甸群落类型的土壤入渗特征及影响因素
- Title:
- Soil Infiltration Characteristics and Its Influencing Factors in Different Subalpine Meadow Communities
- 分类号:
- S152.72
- 摘要:
- 对卧龙自然保护区不同海拔高度的典型亚高山草甸群落类型（嵩草草甸、狼毒草甸、糙野青茅草甸）的土壤入渗性能进行了对比研究。结果表明，亚高山草甸土壤入渗过程总体上可分为3个阶段，即入渗瞬变阶段（0-5 min）、入渗渐变阶段（5-30 min）和稳定入渗阶段（30 min后）。在入渗瞬变阶段和渐变阶段，不同群落类型的入渗速率表现为嵩草草甸 > 狼毒草甸 > 糙野青茅草甸。另外，在嵩草草甸的研究表明，随着土层深度增加，土壤入渗速率呈现逐渐递减的趋势。分别运用Philip、蒋定生、Horton、Kostiakov 4种模型拟合了不同亚高山草甸群落类型的土壤入渗过程，表明Horton模型的拟合精度最高。相关分析表明，亚高山草甸土壤稳渗速率与土壤容重存在极显著负相关关系，而与土壤总孔隙度、非毛管孔隙度、土壤通气度以及单位面积的地上部分生物量均呈极显著正相关关系。
- Abstract:
- The soil infiltration properties of three typical subalpine meadow communities under different altitudes in the Wolong Nature Reserve were examined. The three subalpine meadow communities include Kobresia setchwanensis meadow, Stellera chamaejasme meadow and Deyeuxia scabrescens meadow. The results showed that the process of soil infiltration in subalpine meadow could be divided into 3 stages including transient phase, gradual phase and stable phase. In the transient phase and gradual phase, the sequence of the soil infiltration rates in three different communities were Kobresia setchwanensis meadow > Stellera chamaejasme meadow > Deyeuxia scabrescens meadow. In addition, with increase of soil depth in the Kobresia setchwanensis meadow, the soil infiltration rate showed a gradually decreasing trend. The models of Philip, Jiang Dingsheng, Horton and Kostiakov were used to fit the soil infiltration processes in different subalpine meadow communities. The results showed that Horton model has the highest precision. Correlation analysis showed that the final stable soil infiltration rate had the significantly negative correlation with the soil bulk density, but the significantly positive correlation with the soil total porosity, non-capillary porosity, soil aeration and the aboveground biomass per unit area.
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备注/Memo
收稿日期:2017-08-15;改回日期:2017-09-05。
基金项目:国家基础研究发展规划资助项目（2002CB111504）；滨州学院博士科研资助项目（2014Y02，2014Y14）
作者简介:宋爱云(1974-),女,山东泰安人,博士,讲师,主要从事生态水文和植被生态学研究。E-mail:xueshu210@126.com
通讯作者:刘世荣(1962-),男,辽宁黑山人,博士,研究员,主要从事森林生态学方面研究。E-mail:Liusr9311@163.com