摘要
分析测定元谋干热河谷3个试验点8种不同人工林地土壤的物理性质、化学性质、酶活性和微生物数量变化,运用因子分析方法对人工造林后的林地土壤肥力进行综合评价。结果表明,不同人工林地的土壤肥力均有提高,尤其小叶型豆科树种及其与非豆科树种的混交林,对干热河谷退化土壤生态系统的恢复具有重要作用。同时,呈现出造林时间越长,土壤生态系统的恢复效果越明显的趋势。但应加强林地土壤管理,减少和杜绝人为干扰。
The paper analyzed the changes of soll physical and chemical properties, enzyme activities and the amount of microbes of 8 different types of artificial forest in 3 experimental sites in Yuanmou County, Yunnan Province. At the same time, comprehensive evaluation of soil fertility in artificial forests was conducted by factor analysis. The results showed that soil fertilities were improved in different artificial forests, especially in little-leaf acacia pure forests and in acacia and non-acacia mixed forests. It was very useful for the recovery of degraded soil ecological system in dry-hot valley. On the other hand, it was found that the time of afforestation and the recovery of soil ecological system have obvious positive correlation. So the authers suggested that it should enhance the management of the soil in artificial forest, and decrease or forbid external disturbance.
出处
《林业科学研究》
CSCD
北大核心
2006年第5期574-579,共6页
Forest Research
基金
国家"十五"攻关项目(2001BA606A-07)
科技部公益性项目(2000DIB50164)资助
关键词
干热河谷
人工林
土壤肥力恢复
dry-hot valley
artificial forest
recovery of soil fertility
