Polyhydroxyalkanoates (PHAs) are polymers with widespread applications, from medical devices to packaging. PHAs can be biodegradable in natural environments, such as soil, but the blend of PHA with other materials can change the polymer properties and consequently affect the biodegradation process. The composition of the microbial communities in soil also significantly affects the biodegradation, but other factors such as temperature, pH, and soil moisture, can also be determinant. These ecological and physic/chemical factors change in different seasons and in different soil layers. It is essential to know how these factors influence the PHAs’ biodegradation to understand the impact of PHAs in nature. This review compiles the results on PHA polymers and PHA blends biodegradation, with focus on laboratory tests. The main factors affecting PHA's biodegradation in soil, both in laboratory tests and in the environment are also discussed.

聚羟基链烷酸酯（PHA）是具有广泛用途的聚合物，从医疗设备到包装。在自然环境（例如土壤）中，PHA可以被生物降解，但是PHA与其他材料的共混物会改变聚合物的性能，从而影响生物降解过程。土壤中微生物群落的组成也显着影响生物降解，但其他因素（例如温度，pH和土壤湿度）也可能是决定因素。这些生态和物理/化学因素在不同季节和不同土壤层中都会发生变化。了解这些因素如何影响PHAs的生物降解，以了解PHA在自然界中的影响，至关重要。这篇综述汇编了有关PHA聚合物和PHA共混物生物降解的结果，重点是实验室测试。影响PHA'的主要因素