论文部分内容阅读
选择山东沙质海岸主要植物群落类型，进行了土壤容重、土壤有机质含量及氮、磷、钾养分状况的调查分析。结果表明，各种植物群落均能有效地改良土壤，但以豆科落叶树种对土壤容重的改良效果最明显；不同植物群落土壤养分含量有明显的差异。在７种植物群落类型中，林地土壤有机质高于草地，林地土壤中以黑松纯林有机质含量最低，紫穗槐灌丛和各种类型的针阔混交林提高林地有机质含量的效果明显优于黑松纯林，各种林地土壤氮、磷、钾含量除有效钾外均明显高于草地。
The types of main plant communities in Shandong sandy coast were selected and the soil bulk density, soil organic matter content and the nutrient status of nitrogen, phosphorus and potassium were investigated. The results showed that all kinds of plant communities could effectively improve soil, but the effect of legume deciduous tree on soil bulk density was the most obvious. The nutrient contents of different plant communities were obviously different. Among the seven plant community types, the soil organic matter in forest land was higher than that in grassland. The content of organic matter in the pure soil of Pinus thunbergii forest was the lowest in forest land. The effect of Amorpha fruticosa shrub and various types of coniferous and broad-leaved mixed forest on increasing organic matter content in forest land Pure black pine, forest soil nitrogen, phosphorus and potassium content in addition to the available potassium were significantly higher than the grass.