Regular pattern is a typical feature of vegetation distribution and thus it is important to study the law of vegetation evolution in the fields of desertification and environment conservation. The saturated water absorption effect between the soil water and vegetation plays an crucial role in the vegetation patterns in semi-arid regions, yet its influence on vegetation dynamics is largely ignored. In this paper, we pose a vegetation-water model with saturated water absorption effect of vegetation. Our results show that the parameter $1/P$, which is conversion coefficient of water absorption, has a great impact on pattern formation of vegetation: with the increase of $P$, the density of vegetation decrease, and meanwhile it can induce the transition of different patterns structures. In addition, we find that the increase of appropriate precipitation can postpone the time on the phase transition of the vegetation pattern. The obtained results systematically reveal the effect of saturated water absorption on vegetation systems which well enrich the findings in vegetation dynamics and thus may provide some new insights for vegetation protection.

中文翻译：

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饱和吸水率下植被生长模式动态

规律性格局是植被分布的典型特征，因此在荒漠化和环境保护领域研究植被演化规律具有重要意义。土壤水分与植被之间的饱和吸水效应在半干旱地区植被格局中起着至关重要的作用，但其对植被动态的影响却被人们忽视。在本文中，我们建立了一个具有植被饱和吸水效应的植被-水模型。我们的研究结果表明，吸水率换算系数参数$1/P$对植被格局形成有很大影响：随着$P$的增加，植被密度降低，同时它可以诱导过渡不同的图案结构。此外，我们发现适当降水的增加可以推迟植被格局相变的时间。所获得的结果系统地揭示了饱和吸水对植被系统的影响，很好地丰富了植被动力学的研究成果，为植被保护提供了一些新的见解。