Abstract Organic hydromulches can be an interesting alternative for weed control in perennial crops, but can also reduce soil water evaporation. To examine the effect of a hydromulch layer on soil water content in dry conditions laboratory experiments were conducted at constant 25°C, 40% air RH. Both for small soil containers with a short time course and for larger soil columns (with two sensors at depths of 6 cm and 11 cm) with a longer time course, the presence and also the thickness of hydromulch were significant factors for the temporal evolution of soil water content. Two distinct stages of the evaporation process, the first or initial stage and the last or final stage, were identified, analysed and compared for these experiments. General linear models performed on the soil water content temporal evolutions showed significant differences for the first and last stages at the top and bottom of the soil columns with and without hydromulch. Hydromulch application delayed the evaporation process in comparison with the control. Moreover, the hydromulch layer, which was tested for mechanical resistance to punching, offered enough resistance to prevent its perforation by the sprouts of weed rhizomes.

中文翻译：

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在受控实验室条件下原型水膜对土壤水分蒸发的影响

摘要 有机水覆盖物可以成为多年生作物杂草控制的一种有趣替代方法，但也可以减少土壤水分蒸发。为了检查水覆盖层对干燥条件下土壤含水量的影响，实验室实验在恒定 25°C、40% 空气相对湿度下进行。对于具有较短时间过程的小型土壤容器和具有较长时间过程的较大土柱（在 6 cm 和 11 cm 深度有两个传感器），水覆盖物的存在和厚度是时间演变的重要因素土壤含水量。蒸发过程的两个不同阶段，第一或初始阶段和最后或最后阶段，被识别、分析和比较用于这些实验。对土壤含水量时间演变进行的一般线性模型显示，在有和没有水覆盖的情况下，土柱顶部和底部的第一阶段和最后阶段存在显着差异。与对照相比，Hydromulch 应用延迟了蒸发过程。此外，经过机械抗冲击性测试的水覆盖层提供了足够的抵抗力，以防止杂草根茎的芽穿孔。