海口市海防林带土壤肥力调查与评价

Investigation and Evaluation on Soil Fertility in Coastal Forest of Haikou City

对海口市海防林带木麻黄林、景观林和无林空地的土壤容重、pH值、含盐量、含水量、有机质及N、P、K等理化指标进行测定,并采用内梅罗修正指数对土壤参测指标进行综合评价。结果表明,海口市沙质海岸防护林带土壤pH值为中性;有效氮含量处于中等水平;有效磷和有效钾含量偏低;有机质含量严重缺乏;景观林土壤理化指标远优于其他2种林地;土壤有机质、含水量等与其他指标间都存在极显著的相关关系;海口海岸防护林带整体土壤肥力属于贫瘠水平;影响防护林土壤肥力高低的主要因子是有机质。

In our study,the soil fertility of Casuarinn equies forest,landscape shelterbelt and non-forest land in coastal area of Haikou were investigated and evaluated.The results indicated that the pH value is neutral;available nitrogen is medium level;available phosphorus and potassium are low;organic matter are low seriously;the index of landscape shelterbelt was much better than that of the other two forest;organic matter and moisture content have a significant correlation with other factors;the whole level of coastal area of Haikou is poor;organic matter content was the main factors that affected the forest soil fertility level.