<sub id="zpxhr"></sub>
<address id="zpxhr"></address>

    <address id="zpxhr"></address>
    <sub id="zpxhr"></sub><form id="zpxhr"></form><sub id="zpxhr"></sub>

        <address id="zpxhr"></address>

          <sub id="zpxhr"></sub>

          <sub id="zpxhr"></sub>
          您的瀏覽器版本太低,請使用IE9(或以上)、谷歌、火狐等現代瀏覽器。360、QQju111net登录不上、搜狗等瀏覽器請使用極速模式。
          學院發表文章

          Vegetation growth variation in relation to topography in Horqin Sandy Land

          發布日期:2020-07-15瀏覽次數:信息來源:土地科學與技術學院

          Jiaqi Fan   Yan Xu   Haoyuan Ge   Wei Yang

          Abstract

          Water availability is a major limiting factor for vegetation growth in semi-arid areas. Soil moisture availability is related to topography, which therefore, influences vegetation growth. To examine the response of vegetation growth to topography, we calculated an index of vegetation growth (GRNDVI) and analyzed its distribution along a topography index in Horqin Sandy Land, Inner Mongolia, China. Cropland growth improved and then deteriorated as topography increased, while wetness initially increased and then declined. In contrast, grassland growth initially declined and then improved with increasing topography, while wetness continuously declined. Grassland growth was affected by soil moisture and by different plant species. Cover and height of herbaceous species decreased from flat to hilltop while the cover and height of shrub species increased, especially those species with stronger drought tolerance. Different optimal land use scenarios were proposed based on water availability and topographic position. In the lowest areas, wetlands are proposed to promote natural habitat for aquatic plants and animals. In low areas, water facilities could be constructed and crops planted to supply food. In the middle area, grassland should be utilized to provide some pastures. In the upper and highest areas, drought tolerant shrubs should be planted to stabilize slopes and enhance native biodiversity and ecological integrity. The study could be used as a functional model to reduce desertification in semi-arid areas through optimizing land utilization, maintaining and enhancing ecological integrity and promoting sustainable development.

          Keywords

          GRNDVI; Vegetation growth; Wetness; Topography index; Horqin Sandy Land


          Vegetation growth variation in relation to topography in Horqin Sandy Land.pdf



          ju111net登录不上