应用生态学报2017，Vol.28Issue(12)：4025-4033,9.DOI:10.13287/j.1001-9332.201712.017
土地利用变化对海南土壤水源涵养功能的影响
Effects of land use changes on soil water conservation in Hainan Island, China
摘要
Abstract
In tropical areas,a large number of natural forests have been transformed into other plantations,which affected the water conservation function of terrestrial ecosystems.In order to clarify the effects of land use changes on soil water conservation function,we selected four typical land use types in the central mountainous region of Hainan Island,i.e.,natural forests with stand age greater than 100 years (VF),secondary forests with stand age of 10 years (SF),areca plantations with stand age of 12 years (AF) and rubber plantations with stand age of 35 years (RF).The effects of land use change on soil water holding capacity and water conservation (presented by soil water index,SWI) were assessed.The results showed that,compared with VF,the soil water holding capacity index of other land types decreased in the top soil layer (0-10 cm).AF had the lowest soil water holding capacity in all soil layers.Soil water content and maximum water holding capacity were significantly related to canopy density,soil organic matter and soil bulk density,which indicated that canopy density,soil organic matter and compactness were important factors influencing soil water holding capacity.Compared to VF,soil water conservation of SF,AF and RF were reduced by 27.7％,54.3％ and 11.5％,respectively.The change of soil water conservation was inconsistent in different soil layers.Vegetation canopy density,soil organic matter and soil bulk density explained 83.3％ of the variance of soil water conservation.It was suggested that land use conversion had significantly altered soil water holding capacity and water conservation function.RF could keep the soil water better than AF in the research area.Increasing soil organic matter and reducing soil compaction would be helpful to improve soil water holding capacity and water conservation function in land management.关键词
土地利用变化/土壤持水性能/土壤水源涵养/海南Key words
land use change/soil water holding capacity/soil water conservation/Hainan Island.引用本文复制引用
文志,赵赫,刘磊,欧阳志云,郑华,米红旭,李彦旻..土地利用变化对海南土壤水源涵养功能的影响[J].应用生态学报,2017,28(12):4025-4033,9.基金项目
本文由国家重点研发计划项目(2016YFC0503401)资助 This work was supported by the National key R&D project (2016YFC0503401). （2016YFC0503401）
