固定沙丘（fixed dune），植物盖度>30%，或丘表有薄层粘土结皮、盐结皮，在风力作用下不发生位移的沙丘。
根系吸水条件下固定沙丘水分动态数值模拟研究-植物通 关键词：固定沙丘；根系吸水；数值模拟；水分预测 [gap=2249]Keywords：fixed dune；water uptake by plant roots；numerical simulation；moisture prediction
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固定沙丘植物群落退化严重，需要加强保护，控制放牧强度，防止沙丘活化。
The communities of these sand dune-fixed plants suffer severe degeneration and thus need enhanced protection, grazing control and prevention of sand dunes from becoming mobile.
固定沙丘和丘间低地是物质流和物种流的汇， 同时又是重要的物种扩散的源。
The fixed sandy dune and lowland among sandy dunes act as converge of material and species flow, and they are also the source of species diffusing.
在沙漠利用污水灌溉速生林，可固定沙丘，改良土壤；改善生态环境，实现污水零排放。
That fast - growing forestry in desert can fixup sandbank and meliorate soil, improve environment and prevent waste water from flowing into river.
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