盐城海滨湿地土壤水分空间特征与植被关系研究

在盐城国家级自然保护区内选择研究断面,进行野外监测,运用统计分析的方法,分析了盐城海滨湿土壤水分与植被的关系.结果表明:(1)自然条件下,从芦苇沼泽到米草沼泽,土壤水分呈明显的增加趋势,0~10 cm土层平均含水量从35.98%增加到46.10%;10~20 cm土层平均含水量从37.93%增加到44.80%;20~30 cm土层平均含水量从38.12%增加到46.84%.(2)人为影响下,土壤含水量在整体上表现出从陆地到海洋,先降低后增加的趋势.(3)在植被交错带,米草土壤含水量与斑块大小密切相关,随着斑块面积的增加而增加;芦苇土壤含水量与距海堤距离密切相关,对着距离的增加而增加.

Relationship between Spatial Distributions of Soil Moisture and Vegetation in Yancheng Coastal Wetlands

This study choses Yancheng National Nature Reserve as research object and conducted field environment monito-ring. It then applied statistical methods to analyze the relationship between soil moisture and vegetations. The results showed from the following three points. Firstly, from the Reed swamp to the Spartina marsh, for soils ranking 0~10 cm in depth, the average soil moisture increases from 35. 98% to 46. 10%; for soils ranking 10 ~20 cm in depth, the average moisture increases from 37. 93% to 44. 80%;for soils ranking 20~30 cm in depth, the average moisture increases from 38. 12% to 46. 84% under the natural conditions. Secondly, under the influence of human, the soil moisture content decreased at first and the increased from land to the ocean. Thirdly, in the interlaced vegetation zones, the soil moisture of Spatina marsh is closely to the patch size, which following the increase of patch size. However, the soil moisture of Reed marsh is closely related to the distance from the seawall, which increases with longer distance.