茂名小良不同植被下土壤物理性状对比分析  

Comparative Analysis of Soil Physical Properties in Different Vegetation of Xiaoliang,Maoming

作　　者：刘华[1,2] 

机构地区：[1]湛江师范学院物理科学与技术学院,广东湛江524048 [2]华南农业大学资源与环境学院,广东广州510642

出　　处：《湛江师范学院学报》2010年第6期123-128,共6页Journal of Zhanjiang Normal College

基　　金：广东省自然科学基金资助项目(8152500002000005);广东省科技计划项目(2009B030802049)

摘　　要：通过对茂名小良水保站的4种不同植被类型下的土壤含水量、土壤吸湿水、土壤容重、土壤比重、土壤孔隙度以及土壤的机械组成等6个土壤物理性状指标进行取土化验、对比分析,结果表明:①混交林含水、蓄水性能最好;但土壤质地一般,多石沙;容重和孔隙度都不太好.②松桉混交林比纯桉林容重和比重小,说明桉树混交利于土壤质地改善;但松桉混交林、纯桉林的保水蓄水性能不如混交林,地表沙化,粘粒下移明显.③纯桉林人工全耕深翻,土质疏松利于雨水下渗;桉树林表土层土壤容重比光板地要小,说明对土壤质地有一定的改善作用.④光板地物理性状最差,是无植被保护的结果.因此,在种植桉树时,以混交、适度地配置林下植被、保留枯枝落叶覆盖物来改善土壤物理性质,增进土壤地力是非常重要的.By comparative analysis of the physical properties which including soil moisture,soil absorbing water,the soil bulk density,proportion of soil,soil porosity and physical composition of the soil samples in different vegetation of Xiaoliang,Maoming,the result shows ： ①the ability of the three waterbearing and treestoring in mixed forest is the best;but the soil＇s quality is ordinary and it has lots of sand;the soil bulk density and the soil porosity are not so good.②Eucalyptus pine mixed forest is worse than pure Eucalyptus pine in the soil bulk density and proportion of soil,it shows that Eucalyptus mixed forest is useful to improve the quality of soil;but Eucalyptus pine mixed forest is worse than pure Eucalyptus pine in ability of the three waterbearing and treestoring,the land surface is desert,the sticky clay slips Obviously;the pure Eucalyptus pine is being reclaimed,and it is loose and has many holes,which is good for raining percolation.③Bare land is in the worst physical properties,resulting from no vegetation protection.Therefore,in order to effectively improve the site conditions of the eucalyptus plantations as long as its better management,during the cultivation of eucalyptus.it is quite important to improve soil physical properties and soil fertility by mixed plantation,configuring the understory vegetation moderately and keeping the coverings like the dead leaves on the soil surface.

关 键 词：不同植被 土壤物理形状 对比分析 茂名小良水保站 

分 类 号：S152[农业科学—土壤学]