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The seed germination and plant growth of Sorghum sudanense Stapf, Amaranthus hypochondriacus L. and cowpea was performed investigate the biodegradability of PBS in soil extract liquid, discussed the effect of polymers, oligomers and monomers of PBS on germination and growth of plants. The results showed that Microorganisms in the soil extract liquid can degrade PBS and the pH of the degradation liquid...