Palmaceae could grow normally under full exposure.The optimum soil moisture content for the growth of Araceae was higher than 80%, Agavaceae higher than 70%, and Palmaceae higher than 55%.

• 不同科植物之间对土壤水分的需求差异较大，天南星科植物要求最高（大于80%25），其次是龙舌兰科，为70%25，棕榈科植物要求较低，为55%25；