侵蚀地形对马尾松林下土壤特性的影响  

Effects of Erosional Landform on Soil Properties under Pinus massoniana Forest

作　　者：汪邦稳[1] 夏小林[1] 段剑 

机构地区：[1]安徽省(水利部淮河水利委员会)水利科学研究院,水利水资源安徽省重点实验室,合肥230088 [2]江西省水土保持科学研究院江西省土壤侵蚀与防治重点实验室,南昌330029

出　　处：《土壤学报》2016年第3期808-819,共12页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41201276)资助~~

摘　　要：土壤是植被生长的重要物质基础,其分布和发育受土壤侵蚀的影响。红壤丘陵区马尾松林下土壤侵蚀严重,生态环境脆弱,探清该区马尾松林下土壤侵蚀对土壤分布及其特性的影响,对该地区的植被重建和生态恢复具有重要意义。基于调查取样和分析测试获取的数据,采用统计和灰色关联度分析法分析侵蚀地形对红壤丘陵区马尾松林下土壤特性的影响。结果表明:不同侵蚀地形的土壤特性差异显著,相对于山脊坡和鞍部坡,切沟土壤理化性质的大部分指标含量最高,微生物数量最多,土壤酶活性最大;不同侵蚀地形的土壤特性指标间的相关性差异较大,与山脊坡和鞍部坡相比,切沟的土壤理化性质指标与土壤酶及微生物指标的显著正相关明显增多,土壤特性与切沟的关联度也最高;切沟形成的微环境提升了土壤特性,为植被恢复提供了有利的条件。因此,加大侵蚀沟的环境研究可为快速恢复该地区的土壤与植被提供科学依据。The knowledge of properties and distributions of soils is essential to planning and managing sustainable land use and preventing degradation of the lands,especially lands under Pinus massoniana forest,which are typical degraded lands in red-soil erosion areas of Southern China,reaching 1.42×10^5 km^2 in area at the end of the 1980 s. Soil is an important material basis for vegetation growth and its distribution and development is subject to the influence of soil erosion. The soil under Pinus massoniana forest in the hilly red soil area of South China is exposed to severe soil erosion,making the eco-environment therein very fragile. It is,therefore,of great significance to vegetation restoration and ecological rehabilitation in such areas,to determine impacts of erosional landform on distribution and properties of the soil. For that end,this study analyzed effects of erosional landform on properties of the soil under Pinus massoniana forests in the region（25°26′～26°17′N,114°42′～115°22′E）in Ganxian County of Jiangxi Province,China. The soil in the studied region is laterite derived from granite with the featured of a calcareous humid ferrisol,coarsein texture（60.8% of sand,18.7% of silt,and 20.5% of clay）. Located under the subtropical hilly humid monsoon climate,the region enjoys a mean annual precipitation of about 1 423.4 mm concentrated mainly in the rainy season lasting from April to June. Soil sampling was carried out during the mid-and late-April and mid-October 2013. Four hills were selected typical of the study area. On the ridge,saddle and gully of each hill,a belt transect was laid out at random along the slope and on the upper,mid and lower slope,a sample plot（10 m×10 m）was delineated separately,making up a total of 36 sample plots. In order to keep the samples as consistent as possible in sampling condition,it must be made sure that there had been no rain for 2 weeks before sampling. Soil volumetric water content（SWC）of a sample plot was determined by averaging the soi

关 键 词：土壤 侵蚀地形 马尾松林 红壤丘陵区 

分 类 号：S156.1[农业科学—土壤学]