海城河河岸带土壤理化性质分析

Analysis of soil physical and chemical properties of riparian zone along Haicheng River

对流经辽宁省海城市内的海城河河岸带20个点位0～20 cm、20～30 m、30～40 m 3个不同深度的土壤进行了多项理化性质分析，结果发现海城河河岸带土壤呈碱性，不同深度土壤的pH值差异不显著（P 〉 0.05）；其他理化指标普遍表现出上层至下层逐渐变差的趋势；源头土壤的各项物理化学指标正常；中游由于受到人为干扰和破坏，土壤容重大、孔隙率小、结构性差，全磷、速效磷、有机质、全氮等营养元素含量低；下游土壤物理指标较好，但由于点源污染造成部分化学指标偏高。总体来说，海城河河岸带破坏严重，不能很好的起到河岸带应有的缓冲功能、提高物种丰富度等功能。

Soil physical and chemical properties of riparian zone, where along Haicheng River in Haicheng city, Liaoning province, at 3 layers of 0～20 cm, 20～30 m, and 30～40 m was studied in this paper. The results showed that the soils were alkaline, and the pH value of different layers is not significant. The physical and chemical properties of upper reaches were preferable. In the middle reaches, values of bulk densities were high, total porocity were low, soil structure were bad, and contents of soil total phosphorus, available phosphorus, organic matter and total nitrogen were especially few because of human interference. Physical properties in the lower reaches were better than that in middle reaches. But some chemical properties were higher because of point pollutions. On the whole, the riparian zone along Haicheng River were serious destroyed, and can’t perform its functions such as buffer and improve species diversity.