微塑料和锌及其复合污染对土壤养分的影响

Effects of microplastics,Zinc and their combined pollution on soil nutrients

为探究金属、微塑料和二者复合对土壤性质的影响,研究了两种微塑料和锌及其复合污染对土壤养分的影响,结果表明:0.1%PE可提高碱解氮含量(21.76%)和脲酶活性(52.35%),1%PE则可降低速效磷含量(87.39%),10%PE可提高有机质含量(55.84%);PBAT对土壤养分的促进作用高于PE对土壤养分的促进作用,PBAT对养分的促进作用随添加量的增加而上升;单一锌污染(200 mg·kg^(-1))可提高了脲酶活性(34.43%),400 mg·kg^(-1)则可显著降低有机质含量(21.36%)和速效磷含量(73.77%),而800 mg·kg^(-1)则可显著提高碱解氮含量(38.35%);在微塑料(1%)和锌(400 mg·kg^(-1)和800 mg·kg^(-1))复合污染处理中,PE(1%)-Zn显著提高了速效磷含量(279.18%~387.77%),但800 mg·kg^(-1)的促进作用大于400 mg·kg^(-1)的促进作用,PBAT复合处理能显著提高碱解氮和酶活性,且总体来看,PBAT与400 mg·kg^(-1) Zn复合处理对土壤养分的促进作用要大于与800 mg·kg^(-1) Zn复合处理对土壤养分的促进作用.这些结果可为了解微塑料和锌及其复合污染对土壤养分的影响提供数据支撑.

In order to explore the effects of metals,microplastics and their combination on soil properties,in the report,the effects of two kinds of microplastics (PE and PBAT),three doses (0.1%,1%,and 10%,w/w) and metal Zinc (Zn,200,400,800 mg·kg^(-1)) on soil nutrients were analyzed.The results showed that PE(0.1%)increase the content of alkali hydrolysable nitrogen by 21.76%and the activity of urease by 52.35%,PE(1%)decrease the content of available phosphorus by 87.39%,and PE(10%)increase the content of organic matter by 55.84%;the prompt function of PBAT on soil nutrients is stronger than that of PE,and which increase with the increase of the additives;single Zn pollution (200 mg·kg^(-1)) increase urease activity by 34.43%,single Zn pollution (400 mg·kg^(-1)) significantly reduce organic matter content by 21.36%and available phosphorus content by 73.77%,and single Zn pollution (800 mg·kg^(-1)) significantly increase alkali hydrolyzed nitrogen content by 38.35%;in the combined pollution treatment of microplastics (1%) and Zn (400 mg·kg^(-1) and 800 mg·kg^(-1)),PE (1%)-Zn significantly increase the content of available phosphorus by 279.18%~387.77%,but the promotion effect of Zn (800 mg·kg^(-1)) is greater than that of Zn (400 mg·kg^(-1));PBAT combined with Zn treatment significantly increase alkaline hydrolyzable nitrogen and enzyme activity,the promotion effect of PBAT combined with Zn (400 mg·kg^(-1)) treatment on soil nutrients is greater than that of PBAT combined with Zn (800mg·kg^(-1)) treatment.The results provide the data support for the effects of microplastics,Zn and their combined pollution on soil nutrients.