聚丁二酸丁二醇酯(PBS)生物降解过程对植物生长的影响评价

Evaluation on the effect of the poly (butylenes succinate) biodegradation process on plant growth

通过苏丹草(Sorghum sudanense Stapf)、籽粒笕(Amaranthus hypochondriacus L.)、豇豆(Vigna sesquipedalis Wight)种子的发芽试验及其盆栽试验,考察了PBS在土壤浸提液中的生物降解性能,探讨了PBS高聚物、低聚物和合成单体对植物的发芽和生长影响。研究结果表明:①在土壤浸提液中微生物对PBS有一定的降解作用,且在降解过程中,降解液的pH变化不明显;②PBS高聚物的降解产物对植物生长没有影响;③P BS低聚物在降解初期抑制部分植物的幼苗生长,后期对植物的生长没有影响;④当丁二酸的质量浓度低于200 mg.L-1时,对植物种子的发芽和幼苗生长不会产生影响,当质量浓度高于500 mg.L-1时,将抑制幼苗生长;当1,4-丁二醇的质量浓度低于2 000 mg.L-1时,对种子的发芽和生长没有影响。

In this paper,we have do experiment of the seed germination and plant growth such as Sudan grass,Purple grain jian and cowpea to investigate the degradation of PBS in the soil extract liquid,discuss the effect of polymers,oligomers and monomers of PBS on the germination and growth of plants.The results show that： ①Microorganisms in the soil extract liquid can degrade PBS and the pH of the degradation liquid did not change significantly.②The degradation progress of polymer has no effect on the plant growth.③T he degradation products of PBS oligomers inhibit the growth of some seedlings in initial stages,but have no effect in later stage.④ When the succinate concentration is lower than 200 mg.L-1,it has no effect to the plant seed germination and seedling growth,but when it is higher than 500 mg.L-1,it will inhibit the seedling growth.When the 1,4-butanediol concentration is less than 2 000 mg.L-1,it has no effect to the seed germination and growth.