基于小流域尺度的黄土区不同植被类型对土壤物理性质的影响  

Effects of Different Vegetation Types on Soil Physical Propertiesin Loess Region Based on Small Watershed Scale

作　　者：权国荣 孙军刚 李新斌 康成鑫 Quan Guorong;Sun Jungang;Li Xinbin;Kang Chengxin(Xi an Center of Mineral Resources Survey,China Geological Survey,Xi an,Shaanxi 710100;School of Earth Sciences and Resources,Chang an University,Xi an,Shaanxi 710054)

机构地区：[1]中国地质调查局西安矿产资源调查中心,陕西西安710100 [2]长安大学地球科学与资源学院,陕西西安710054

出　　处：《资源环境与工程》2023年第2期227-233,共7页Resources Environment & Engineering

基　　金：中国地质调查局项目“新疆青河阿拉塔斯一带金矿重点调查区调查评价”(DD20230378)。

摘　　要：以陕西省韩城市凿开河流域的土壤和植被为研究对象,探索不同植被类型对林地表层土壤物理性质的影响。采用样方法进行林地调查,得到不同区域的植被类型及优势群落组合;采用环刀法采集流域范围的表层土壤样,用于测试土壤物理性质;采用条带法将植被类型与土壤物理性质进行比对研究。结果表明,土壤物理性质并不是沿凿开河流域递变,各指标在高覆盖灌木林带与低覆盖特灌林带交界处产生较大异常,使含水率、毛管孔隙度、毛管持水量、最大持水量等值偏大,容重值偏小;以辽东栎+油松—艾蒿二元结构为代表的植被类型对土壤的储水能力有积极影响,而油松+侧柏—胡枝子—艾蒿这类草本植物含量多的植被群落的土壤含水率、毛管孔隙度、持水量值偏小,会减弱表层土壤的储水能力。The purpose of this study was to explore the effects of different vegetation types on the physical properties of the topsoil of a forestland in Hancheng,Shaanxi province.The vegetation types and dominant population combinations in different regions were obtained by using the sampling method and surface soil samples in the watershed were collected by using the cutting ring method to test the physical properties of the topsoil,the belt method was used to compare the vegetation types with the physical properties.The results showed that the soil physical properties did not change gradually along the excavated river basin,and all the indexes were abnormal at the junction of high-cover shrub belt and low-cover special shrub belt,so that the water content,capillary porosity,capillary water holding capacity,maximum water holding capacity equal value is larger,the unit weight value is smaller,the vegetation types represented by the binary structure of Quercus liaotungensis,Pinus tabulaeformis and Artemisia argyi have positive effects on soil water storage capacity,however,the soil water content,capillary porosity and water holding capacity of the herbaceous plant vegetation communities such as Pinus tabulaeformis,Platycladus orientalis,Lespedeza and Artemisia argyi were lower,which would weaken the water storage capacity of the topsoil.

关 键 词：植被类型 土壤物理性质 林地土壤 条带法 黄土高原 

分 类 号：X141[环境科学与工程—环境科学] S152[农业科学—土壤学]