不同森林类型土壤肥力状况研究

利用贵州天保工程效益监测网络设置在9个监测县和2个自然保护区的101个固定样地土壤分析结果,按常绿落叶阔叶林、常绿阔叶林、落叶阔叶林、针阔混交林、针叶林、针叶混交林、灌木林、竹林等8种不同森林植被类型在不同基岩发育的森林土壤中营养元素含量,对不同森林土壤的综合肥力进行分析评价。结果显示,不同森林植被类型的森林土壤的A层土中有机质、水解性氮、有效磷、速效钾等各项指标含量与森林植被类型呈正相关趋势且高于B层,B层土随不同基岩不同而有所变化,显示不同森林植被类型对土壤综合肥力的影响大于基岩;不同森林植被类型土壤的综合肥力大小顺序依次为:常绿落叶阔叶林>常绿阔叶林>针针混交林>落叶阔叶林>灌木林>针阔混交林>针叶林>竹类。

Study on the Soil Fertility of Different Forest Types

Base on the analysis of soil samples collected from 101 permanent plots which set up in the areas of the Natural Forest Protection Project in Guizhou province,this paper conducted a comprehensive evaluation of the fertility of different soil types which developed from different bedrocks in different forest types.The result showed that layer A of the soils in different forest types,compared with the layer B,had higher contents of,which also had a positive relation with the forest types and showed that the influence of forest type on the soil fertility are greater than that of bedrocks.The soil fertilities of different forest types were as follows: evergreen and deciduous broadleaf forest > evergreen broadleaf forest > conifer-conifer mixed forest>deciduous broadleaf forest > shrub forest > coniferous and broad-leaved mixed forest > conifer forest > bamboo forest.