林型差异对土壤理化性状及其持水能力的影响

发布时间：2018-04-19 10:15

本文选题：林型 + 土壤物理特性　；参考：《中南林业科技大学学报》2017年08期

【摘要】：为了探明林型差异对土壤理化特征及其持水能力的影响,采集老虎岭水源涵养林区域4种最典型的林型(马尾松林、马尾松-红锥林、马尾松-红锥-i木林、红锥-大叶栎林)土壤进行理化特征及其持水能力测定分析。结果表明:土壤毛管孔隙度、持水能力和化学性质在4种林型中存在明显的差异,其中马尾松-红锥林土壤容重最小,总孔隙度和毛管孔隙度最大,最大持水量、毛管持水量、有机质、速效氮和速效磷最多;马尾松-红锥-i木林非毛管孔隙度最大,全氮、全磷、速效钾和代换性镁最多;红锥-大叶栎林全钾最多;马尾松林土壤容重、非毛管持水量和代换性钙最大,总孔隙度、毛管孔隙度、自然含水率、最大持水量、毛管持水量、全量和速效养分均最低。总体表现,混交林型的土壤理化特征及持蓄能力均优于马尾松纯林,尤以马尾松-红锥林型为最佳。
[Abstract]:In order to find out the effect of forest type difference on soil physical and chemical characteristics and water holding capacity, four typical forest types (Pinus massoniana, Pinus massoniana, Pinus massoniana) and Pinus massoniana (Pinus massoniana) were collected.Soil physicochemical characteristics and water holding capacity were determined and analyzed.The results showed that there were obvious differences in soil capillary porosity, water holding capacity and chemical properties among the four forest types. Among them, the soil bulk density of Pinus massoniana forest was the smallest, the total porosity and capillary porosity was the largest, the maximum water holding capacity and capillary water holding capacity.Organic matter, available nitrogen and available phosphorus were the most, non-capillary porosity was the largest, total nitrogen, total phosphorus, available potassium and exchangeable magnesium were the most in Pinus massoniana, Quercus macrophylla forest, Pinus massoniana forest, and soil bulk density of Pinus massoniana forest.The total porosity, capillary porosity, natural water content, maximum water holding capacity, capillary water holding capacity, total capacity and available nutrients were the lowest.In general, the soil physicochemical characteristics and storage capacity of mixed forest were better than that of pure Pinus massoniana forest, especially the Pinus massoniana (Pinus massoniana) -red cone forest.
【作者单位】：广西林业科学研究院;广西优良材林资源培育重点实验室;国家林业局中南速生材繁育实验室;
【基金】：广西林业科技项目“珠江流域中上游水源涵养林结构及功能研究”(桂林科字[2012]第7号) 国家林业公益性行业科研专项“南方几种森林类型公益林经营技术研究”(201204512)
【分类号】：S714

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