摘要
为了恢复黄土高原典型水蚀风蚀交错带六道沟流域的脆弱的生态环境,本文对六道沟流域不同坡位不同土地利用方式的土壤进行采样调查,利用高速离心机测定土样的水分特征曲线,评价了该流域土壤的持水特征和水分有效性。结果表明:A值、S(C(θ)=10-2)值及A*B值适合用于评价六道沟流域内的风沙土的土壤持水性能;在坡上位,土壤持水性能及水分有效性顺序为:农地>柠条、沙蒿地>杨树林地;在坡中位,农地的土壤持水性能与土壤水分有效性最高,杨树林地的最差;在坡下位,柠条地的持水性能及土壤水分有效性高于荒草地、杨树地和柠条、沙蒿地。本区域应选择土壤持水性能和水分有效性高的柠条、沙蒿灌木植物进行生态恢复。
In order to conduct ecological environment restoration in Liudaogou basin located in water-wind erosion crisscross region on the Loess Plateau,the soils in different position of slope under different land uses were sampled in Liudaogou basin and soil water characteristics curves were measured by centrifugal method.Soil retention characteristics and water validity were reviewed based on data.The results showed that indexes of A,S（C（θ） =10^-2） and AB were suit of evaluating soil water retention ability in Liudaogou basin.At the top part of the slope land,the soil water retention ability and soil moisture validity of farmland,Caragana korshinskii Kom and Artmisa arenaria land were better than that of the Poplar field;at the middle of the slope of land,the soil water retention ability and the soil moisture validity of farmland were the best,which of the Poplar field were the worst;at the bottom of the slope of the land,the soil water characteristics and the soil moisture validity of the Caragana korshinskii Kom were better than that of the other soil under different land uses.So shrub plants with high retention capacity and water validity such as Caragana korshinskii Kom and Artmisa arenaria,should be chosen to use for vegetation Restoration in Liudaogou basin.
出处
《中国农学通报》
CSCD
2008年第8期279-282,共4页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金"黄土高原水蚀风蚀交错带小流域生态恢复模式与环境效应研究"(90502006)
湖南省自然科学基金"胀缩土壤的水动力学特征研究"(06JJ3020)。
关键词
六道沟流域
土壤持水特征
土壤水分有效性
Liudaogou basin,soil water characteristics,validity of soil moisture
