丘间低地

沙地植被在沙丘-丘间低地景观尺度上的分布格局决定于地形及因地形而异的土壤水分梯度。

The vegetation distributing pattern at the scale of dune-lowland lies on the terrain and the soil water gradient .

半流动沙地和丘间低地的表层与亚表层土壤水分空间结构差异较小，但土壤水分空间变异性都要高于沙质草场表层。

The variability degree of soil moisture in three sands is in the order : sandy grassland > semi-mobile dune > inter-dune bottomland .

毛乌素沙地湖滨低地和丘间低地植物群落均有带状分布特点，但影响湖滨低地和丘间低地植物群落带状分布的环境因子有差异。

However , there are differences between the influencing environmental factors of the zonal distribution of plant communities of lake shore lowland and inter-dune lowland .

丘间低地土壤水分变化特征表现为：水分变化频繁活动层，水分潜在供应层，水分相对稳定层。

The changing features of the soil water in the lowland around by sand dune are : the frequent changing layer , the potential supplying layer and the relatively stable layer .

半固定沙丘上的黄柳根系最发达（根系分布深，数量大），固定沙丘的黄柳明显不及前者，而丘间低地的黄柳根系最不发达。

The population in the semi fixed sand dunes had the most developed root systems , followed by the population in the fixed sand dunes , and that in the inter dunes lowland was the last .

与固定半固定沙丘相比，流动沙地丘间低地土壤各层水分处于高含水量状态，说明固定沙地的植物蒸腾和土壤蒸发耗水量大于流动沙地丘间低地。

Compared with the fixed or semi-fixed dunes , the lowland among moving dunes showed high soil water content , and this explained that plant transpiration and soil evaporation of fixed dunes were larger than the moving dunes .

根据实地调查和参阅资料，依山前洪积扇、河流沿岸阶地、沙丘及丘间低地、戈壁、盐沼的景观斑块，初步探讨干旱区植被的自然更新机制。

In terms of such landscape patches as piedmont proluvial fan , terrace land by river , sand dune , inter-dune lowland Gobi and salt mash , the mechanisms of natural vegetation regeneration was preliminarily explored in arid desert regions by field survey and data reference .