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Does WPC affect soil aggregate stability in a landscape tree box?
Wood-Plastic Composite (WPC) is increasingly used in urban landscaping, particularly in tree boxes, due to its durability and low maintenance. However, its impact on soil aggregate stability—a critical factor for root growth and water infiltration—remains a topic of debate.
Studies suggest that WPC may alter soil structure by reducing organic matter decomposition and microbial activity, potentially weakening aggregate stability. Conversely, its moisture retention properties could benefit soil cohesion in arid environments. Field experiments in urban tree boxes show mixed results, with some soils exhibiting improved stability due to reduced erosion, while others suffer from compaction.
For urban planners, balancing WPC's practical benefits with soil health considerations is essential. Further research is needed to optimize WPC designs that support both tree vitality and long-term soil integrity.
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