太行山低山丘陵区不同植被类型土壤渗透特性及影响因素

发布时间：2018-04-03 08:30

本文选题：土壤入渗　切入点：植被类型　出处：《水土保持研究》2016年04期

【摘要】：为了探讨太行山低山丘陵区不同植被恢复类型土壤水分入渗规律及影响因素,采用双环刀入渗法和相关分析、典型相关分析方法,研究了该区域不同植被群落表层土壤的入渗特性,对土壤入渗过程进行模拟,并深入探讨了土壤入渗的影响因素。结果表明:(1)从裸地、草地、灌草地、灌丛到乔灌林地,土壤渗透性能不断增加;不同植被类型0—10cm层土壤渗透速率大于10—20cm层土壤渗透速率;土壤初渗速率和稳渗速率最大值均出现在侧柏林地,分别为5.96mm/min和4.76mm/min。(2)土壤入渗模型拟合结果表明Philip入渗模型对不同植被类型土壤入渗过程拟合效果最好,Kostiakov入渗模型拟合效果次之,Horton入渗模型拟合效果最差,不适合用于描述该区域土壤入渗特征。(3)土壤渗透特性指标与土壤容重、总孔隙度、有机质质量分数、根质量密度、根体积密度、根平均直径存在显著相关关系(p0.05);土壤理化性质指标和根系结构指标中对土壤渗透性能产生影响作用最大的分别是总孔隙度和根平均直径,典型相关负荷量分别为1.299,1.084。
[Abstract]:In order to study the infiltration law and influencing factors of soil moisture in different vegetation restoration types in the low hill area of Taihang Mountain, the double loop knife infiltration method and correlation analysis were used, and the typical correlation analysis method was used.The infiltration characteristics of surface soil of different vegetation communities in this area were studied, the infiltration process of soil was simulated, and the influencing factors of soil infiltration were discussed.The results showed that from bare land, grassland, shrub grassland, shrub to arboreal forest land, the soil permeability of 0-10cm layer of different vegetation types was higher than that of 10-20cm layer, and the soil permeability of different vegetation types was higher than that of 10-20cm layer.The maximum values of initial infiltration rate and steady infiltration rate were found in Platycladus orientalis forest land.The fitting results of 5.96mm/min and 4.76mm / min. 2) soil infiltration model showed that Philip infiltration model had the best fitting effect on soil infiltration process of different vegetation types, and Kostiakov infiltration model had the worst fitting effect, and Horton infiltration model had the worst fitting effect.It is not suitable to describe the soil permeability characteristics and soil bulk density, total porosity, organic matter mass fraction, root mass density, root volume density.There was a significant correlation between the average root diameter and the soil physical and chemical properties and root structure, the total porosity and the root mean diameter were the most significant ones, and the typical correlation load was 1.299 ~ 1.084 respectively.
【作者单位】：河南农业大学林学院;
【基金】：国家自然科学基金(31570613,41401206,41501331)
【分类号】：S152.7

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