梅州市清凉山库区森林土壤物理性质初步研究

A Study on the Soil Physical Properties of the Different Forest in Oingliangshan District

采用剖面分析方法,初步研究了梅州市清凉山库区两种主要森林类型土壤物理性质及其对水源涵养功能的影响。结果表明:研究区的两种主要林分土壤物理性质差异明显,天然常绿阔叶林的土壤物理性质较好,具有良好的水源涵养功能。在两种林地中,人工桉树林地表层土壤砂粒含量明显偏高,是天然常绿阔叶林地的1.59倍;黏粒含量的分布则相反。人工按树林地表层土壤容重和比重皆大于天然常绿阔叶林地,且由表土层至心土层呈现逐渐增加的趋势。土壤孔隙度与自然含水量则天然常绿阔叶林地大于桉树林地。在土层垂直方向上,常绿阔叶林地的物理性质变化差异较大,人工桉树林地相对较小。

With eucalyptus forest and broad - leaf forest for the main object, the soil physical properties and the water - conesrvation function of different forest have been researched on the base of the methods of typical region investigation, experiment study in site in fixed standard area in Qingliangshan district. The result showsd that there sxist singnificant differences in soil properties and water conservation function among the two forest types. Under the similar site condition, the broad - leaf forest has greater water conservation function and better maintenance of fertilyity than the eucalyptus forest does. The contents of cloay, natural moisture capacity and soil porosity in the soils of broad - leaf forest is higher than eucalyptus forest. But the cfontents of the sand, specific gravity and soil bulk density in the soils of broad - leaf forest is smaller. In the different layers, the diversity of soil physical properties of broad - leaf forest is larger, and the eucalyptus forest is amaller.