Moisture in vegetation concrete substrate is the decisive factor in vegetation growth and ecosystem construction. It is also the key of ecological protection technology and its protection system. By studying the effect of slope on the evaporation of substrate, it can provide basis for the early maintenance of the substrate and seed germination. Through the single variable method, the effect of different slope on the early evapotranspiration of the substrate was discussed, and the test results were obtained by using the weighing method. The results show that the areas with steep slopes are faster than those with steep slopes, and the accumulated evaporations are large. The relationship between the cumulative amount of water evaporation and the amount of evaporation in the upper part, the middle part and the lower part of the substrate is upper part>middle part>lower part. Depending on the effect of slope on the early evaporation of the substrate, a small amount of sprinkler maintenance should be done daily, on days 2, 5, 7, and beyond, to ensure even distribution of substrate moisture.%植被混凝土基材中的水分是植被生长、生态体系构建的决定性因素,也是生态防护技术及其防护体系的关键,通过研究坡度对基材蒸发效应的影响,为基材早期养护及种子萌发提供依据.通过单一变量法,探讨了不同坡度对基材早期蒸散效应的影响,同时利用称重法得出试验结果.结果表明:坡度陡的区域比坡度缓的区域蒸发速率快,累计蒸发量大;基材上部、中部、下部内的水分蒸发累积量与蒸发变化量的关系都是上部>中部>下部.根据坡度对基材早期蒸发的影响,应在基材养护第2天、第5天、第7天及以后每天进行少量的洒水养护,确保基材水分均匀分布.
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