不同森林类型土壤肥力的差异分析

Comparison of Soil Fertility for Different Forest Types

对凉水自然保护区的原始阔叶红松林、次生林和人工红松林的土壤肥力进行了对比研究,探讨了原始林经采伐后天然更新为次生林或营造为红松人工林,其肥力的变化情况。结果表明,原始林的整体肥力水平最高,次生林居中,人工林最低;3种林型下,土壤酶活性差异较显著。

The fertilities of primitive broad - leaved pine forest, secondary forest and artificial forest were studied, and the chan-ges of soil fertility for primitive forest, which evolved to secondary forest by natural regeneration or evolved to artificial forest by planning, were also explored. The results show that the whole soil fertility level from high to low is in the order of primitive forest, secondary forest and artificial forest; there is significant difference between these three forest types in en-zyme activity.