为揭示乌兰布和沙漠植被因子对风速及输沙的影响，选择以梭梭（Haloxylon ammodendron）、霸王（Zygophyllum xanthoxylum）、四合木（Tetraena mongolica）和沙冬青（Ammopiptanthus mongolicus）为主要建群种的典型植物群落开展风沙活动观测。结果表明，粗糙度Z₀与植被盖度c、植被高度h和风速U_Z 符合Z₀=a₀ch+b₀U_Z +c₀关系（a₀>0，b₀<0），输沙率Q与风速v、植被因子之间的关系符合Q=exp（a₁ch+b₁v² +c₁）指数函数关系；风速是影响输沙率的最主要因素，与粗糙度负相关，与输沙率正相关；植被因子与粗糙度正相关，与输沙率负相关。建立多因素综合关系式分析植物群落植被因子对风沙运动的影响具备实际物理意义，输沙率随影响因素呈指数函数变化，拟合结果系数及影响因子贡献率可作为影响因素的量化指标，植被因子对粗糙度及输沙率造成影响具有一定的尺度范围。乌兰布和沙漠沿黄两岸，下垫面结构紧密的霸王+四合木群落相对于其他两个群落对粗糙度和输沙率影响最大。

This study aims to investigate the effects of different plant community types on wind speed and sediment transport in the Ulan Buh desert area. Three typical vegetation communities with Haloxylon ammodendron， Zygophyllum xanthoxylum， Tetraena mongolica， and Ammopiptanthus mongolicus as the dominant species were selected for wind and sand dynamic observations. The research results show that the roughness coefficient Z₀ of vegetation communities is related to the vegetation coverage c， vegetation height h， and wind speed U_Z by the function Z₀=a₀ch+b₀U_Z +c₀ （where a₀>0 and b₀<0）. The sediment transport rate can be described by the exponential function model Q=exp（a₁ch+b₁v² +c₁）， where the wind speed v， vegetation factors， and sediment transport rate Q are related. Wind speed， as a key factor affecting roughness and sediment transport rate， is negatively correlated with roughness and positively correlated with sediment transport rate. Vegetation factors are positively correlated with roughness and negatively correlated with sediment transport rate. By establishing a multi-factor comprehensive relationship， it is possible to more accurately analyze the effects of plant community wind and sand movement， where the sediment transport rate changes with the influence factors in an exponential function manner. The coefficients of the fitting results and the contribution rates of the influencing factors can be used as quantitative indicators to evaluate the influence range of vegetation factors on roughness and sediment transport rate. In the Ulan Buh desert along the Yellow River， the Zygophyllum xanthoxylum+Tetraena mongolica community with a tight underlying surface structure has the most significant effects on roughness and sediment transport rate compared to other communities.