贵州雷山县不同类型林地的土壤肥力

Soil Fertility of Different Forestlands in Leishan County,Guizhou

为探讨贵州省雷山县不同类型的林地土壤肥力差异,揭示不同类型林地土壤肥力与林木生长关系,保证森林的合理开发利用。对阔叶林、针阔混交林和针叶林3种林地采集的土壤样本进行了机械组成及9个肥力指标的检测和对比分析。结果表明,3种林地的有机质、全N、碱解N、全K和速效K含量达显著差异(p<0.05);有效P和阳离子交换量(CEC)达极显著差异(p<0.01);pH值和全P含量未达到显著性差异;3种类型林地的土壤肥力整体水平存在极显著差异(p<0.01),土壤肥力水平表现为针阔混交林>阔叶林>针叶林。

In order to study the difference of the soil fertility of three different forestlands in Leishan County of Guizhou, reveal the relationship between soil fertility of different forest types and forest growth, and to ensure the rational development and utilization of forest. Soil samples were collected in three forest lands, including broad-leaved forest, coniferous and broad-leaved mixed forest and coniferous forest, mechanical composition and nine soil fertility indexes were examined and the differences of the three forestland types were compared. Results showed that the organic matter, total N, available N, total K and quacking K were significantly different （p 〈 0. 05）. The valid P and CEC were significantly different （p〈0.01）. However, the total P and pH were not significantly different. The whole level of soil fertility of three forestlands were significantly different （p〈0. 01）, the soil fertility form high to low was coniferous and broad-leaved mixed forest〉broad-leaved forest 〉coniferous forest.