这表明自然条件下接近进化稳定对策(ESS)的地方品种，在土壤水分条件较好时存在着生长冗余，从而阻碍产量提高。
It showed that cultivar which approaching evolutionary stable strategies (ESS) in natural condition has growth redundance as soil water condition improving.
随着时间的增加，砂柱中的饱和度剖面逐渐接近于稳定时的饱和度剖面，对应于粗砂的土壤水分特征曲线。
As time progresses, the water saturation profile becomes closer to the steady-state profile, which corresponds to the soil-water characteristic curve of the coarse sand.
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.
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