高冰草对土壤物理性质的影响研究

Study on Effect of Agropyron elongatum on Soil Physical Properties

为探讨高冰草(Agropyron elongatum)对土壤物理性质的改良效果,本文对种植高冰草前、后不同土层的多项土壤物理性质指标进行了比较分析。结果表明:种植高冰草后的所有土层土壤总孔隙度、毛管孔隙度、土壤含水量、毛管持水量和田间持水量均极显著提高(P<0.01),非毛管孔隙度极显著降低(P<0.01),而土壤容重、土壤通气度则无明显差异。随着土层深度的增加,土壤总孔隙度、毛管孔隙度、土壤含水量、毛管持水量和田间持水量和土壤通气度均呈递减趋势,土壤非毛管孔隙度呈先增加后递减的趋势,土壤容重则呈递增趋势。综合分析表明,种植高冰草有利于增强土壤涵养水源的能力,提高水资源利用效率,对土壤的物理性质有一定的改善作用。

In order to explore the improvement effect of Agropyron elongatum on soil physical properties,thispaper compared and analyzed several indexes of soil physical property in different soil layers before and after planting A.elongatum.The results showed that,after planting A.elongatum,soil total porosity,capillary porosity,soil water content,capillary water-holding capacity and field water-holding capacity in all soil layers increased significantly(P<0.01),while noncapillary porosity decreased significantly(P<0.01),but soil bulk density and soil aeration showed nosignificant difference.With the increase of soil depth,soil total porosity,capillary porosity,soil water content,capillarywater-holding capacity,field water-holding capacity and soil aeration all showed a decreasing trend,soil noncapillaryporosity first increased and then decreased,and soil bulk density showed an increasing trend.Generalized analysisshows that planting A.elongatum is beneficial to enhancing the ability of soil to conserve water resources,improving theefficiency of water resources utilization,which has certain ameliorative effect on soil physical properties.