文昌市5种不同森林类型土壤物理性质分析研究

利用样地调查法对文昌市5种不同森林类型土壤物理性质进行分析,结果表明:土壤平均容重木麻黄林最大(1.574 g/m3),大叶相思林最小(1.454 g/m3);总孔隙度大叶相思林最大(46.187),木麻黄林最小(42.177);土壤含水率椰子林最高,平均达到7.957%,而木麻黄林含水率最小,平均为1.032%。pH在4.81~6.59,相思林、木麻黄林和桉树林均为极强酸性(pH 4.5~5.5)土壤,次生林和椰子林为弱酸性土壤。该研究准确评估文昌市5种森林类型土壤物理性质的差异性,可为营造热带混交人工林近自然化改造经营提供理论依据。

Study on Soil Physical Properties of Five Different Forest Types in Wenchang City

Based on the soil physical properties of five different forest types in Wenchang City,the soil physical properties of five forest types were analyzed by using the sample survey method.The results showed that average soil density of Casuarina equisetifolia was the largest (1.574 g/m3) and Acacia auriculaeformis was the minimum (1.454 g/m3);Total porosity of Acacia auriculaeformis was the largest (46.187),and it of Casuarina equisetifolia was the minimum (42.177);Soil moisture content of coconut forest was the highest,the average value reached 7.957％,while the minimum moisture content of Casuarina equisetifolia,an average of 1.032％.Soil pH was between 4.81 and 6.59,soil of Acacia auriculaeformis,Casuarina equisetifolia and Eucalyptus were highly acidic (pH 4.5-5.5),soil of secondary forest and coconut forest were weak acid.This study was to evaluate the physical properties of five forest types in Wenchang City in order to provide theoretical basis for the construction of tropical mixed plantations.