【摘要】 水土保持林作为保持水土、防止土壤侵蚀的特有林种 ,对于提高土壤肥力具有重要作用。常见的评价土壤肥力的指标有土壤酶活性、土壤有机质含量、土壤有机 -无机复合体和微团聚体、土壤颗粒组成、土壤微生物数量以及土壤的其它理化性状等。通过分析不同水土保持林的土壤酶活性和土壤有机质含量 ,对其土壤肥力进行了评价。结果表明 ,有林地土壤肥力高于无林地 ;油松 -阔叶树混交林土壤肥力比油松纯林更高 ;同一林分随着林龄的增长 ,土壤肥力也在增加 ;各地类土壤的肥力水平均表现为表层最高 ,中层次之 ,下层最低更多还原

【Abstract】 Water and soil conservation forest that is a special forest to prevent soil erosion plays a very important role in improving soil fertility. And the indexes used to evaluate fertilities of different forests mainly include soil enzyme activities, organic matter content, organo-mineral complexes and micro aggregate, granule composition, microorganism quantity and other physical and chemical qualities etc. This paper analyzed soil enzyme activities and organic matter content of different water and soil conservation forests and made an evaluation on their soil fertilities. The results showed that soil fertility of forests land was higher than that of non forests land, and mixed forest soil of Chinese pine forest and broad leaved forest was more fertile than that of pure forest. With forest aging, soil fertility of the same forest was increasing too. And soil fertilities of every kind of land were surface layer>medium layer>deeper layer.更多还原