Platostoma palustre is an annual herb and an important medicinal and edible plant in southern China. Plastic-film mulching is an effective agronomic practice in the cultivation system of P. palustre, of which black-film mulching is the most common. However, fewer researches have been focused on the use of other colors of plastic films in P. palustre cultivation. In this study, different colors (white, black, red, and green) of plastic film were adopted, and the effects of different colors of plastic film mulching on the soil temperature, yield, and metabolites of P. palustre were investigated. The results showed that the fresh weight of a single plant of the green film treatment was significantly higher than that of the white film treatment (n = top 28). Based on the results of three temperature measurements, the soil temperature was almost the highest in the red film treatment and lowest in the white film treatment. The metabolomic analysis revealed that a total of 103 differential metabolites were identified. Among these, the gluconic acid, deoxyribose, and N-Acetylmannosamine in the red film treatment presented the highest abundance compared with the other treatments, meanwhile, the abundances of the five monosaccharides in the red film treatment were significantly higher than those of the green film treatment. Moreover, the sucrose, trehalose, and D-(+)-trehalose in the green film treatment exhibited the highest abundance, and the abundances of eight different amino acids in the red film treatment were almost the lowest while those in the black film treatment were almost the highest. Further analysis of the membership function values indicated that the black and red film treatments might be more suitable for the cultivation and quality production of P. palustre in comparison with the other two treatments. This study will provide a theoretical basis for improving the efficient cultivation technology of P. palustre and forming a theoretical system of P. palustre film mulching cultivation.

沼泽草（Platostoma palustre）是一年生草本植物，是我国南方重要的药食两用植物。地膜覆盖是沼泽地栽培系统中一种有效的农艺措施，其中黑地膜覆盖最为常见。然而，对于其他颜色的塑料薄膜在沼泽地栽培中的使用的研究较少。本研究采用不同颜色（白色、黑色、红色、绿色）地膜，研究不同颜色地膜覆盖对土壤温度、产量及沼泽地草代谢产物的影响。结果表明，绿膜处理的单株鲜重显着高于白膜处理（n=前28）。从3次测温结果来看，土壤温度几乎是红膜处理最高，白膜处理最低。代谢组学分析显示总共鉴定出 103 种差异代谢物。其中，红膜处理中的葡萄糖酸、脱氧核糖和N-乙酰甘露糖胺与其他处理相比丰度最高，同时红膜处理中5种单糖的丰度显着高于绿膜处理。治疗。此外，绿膜处理中蔗糖、海藻糖和D-(+)-海藻糖的丰度最高，红膜处理中8种不同氨基酸的丰度几乎最低，黑膜处理中的丰度最低。几乎是最高的。 进一步分析隶属函数值表明，与其他两种处理相比，黑膜和红膜处理可能更适合沼泽地的栽培和优质生产。本研究将为完善沼泽高效栽培技术、形成沼泽地膜覆盖栽培理论体系提供理论依据。