Soil Anti-Scouribility Enhanced by Plant Roots

编号 zgly0000369899

文献类型 期刊论文

文献题名 Soil Anti-Scouribility Enhanced by Plant Roots

学科分类 220.1060;森林生态学

作者 Zheng-ChaoZHOU  Zhou-PingSHANGGUAN 

作者单位 StateKeyLaboratoryofSoilErosionandDrylandFarmingontheLoessPlateau 

母体文献 Journal of Integrative Plant Biology;植物学报: 英文版 

年卷期 2005,47(6)

页码 676-682

年份 2005 

分类号 Q948.113  S157 

关键词 植物  根系表面积  耐冲刷性  计算机图像处理  黄土高原  水土保持 

文摘内容 The magnitude of soil anti-scouribility depends on the physical condition of the soil. Plant roots can greatly enhance soil stability and anti-erodibility. A scouring experiment of undisturbed soil was conducted to investigate the effects of roots on soil anti-scouribility and its distribution in the soil profile. At the end of each erosion test, plant roots were collected from soil samples and root surface area was calculated by means of a computer image analysis system (CIAS). Root surface area density (RSAD), the surface area of the roots per unit of soil volume, was related to soil anti-scouribility. More than 83% of root surface area was concentrated in the 0-30 cm soil layer. Soil anti-scouribility increased with an increase in RSAD and the value of intensified soil anti-scouribility (ΔAS) can be expressed by exponential equations, depending on the plant species. These equations were ΔAS=9.578 6 RSAD^0.8321 (R^2=0.951) for afforested Pinus tabulaeformis Carr.ΔAS=7.8087 RSAD^0.7894(R^2=0.974) for afforested Robinia pseudoacacia L., and ΔAS=9.256 6 RSAD^0.8707(R^2=0.899) for Bothriochloa ischemum L。