title: Effects of plastic film residues on occurrence of phthalates and microbial activity in soils.
abstract: Plastic film mulching has played an important role in Chinese agriculture, especially in vegetable production, but large amounts of film residues can accumulate in the soil. The present study investigated the effects of plastic film residues on the occurrence of soil PAEs and microbial activities using a batch pot experiment. PAE concentrations increased with increasing plastic film residues but the soil microbial carbon and nitrogen, enzyme activities and microbial diversity decreased significantly. At the end of the experiment the PAE concentrations were 0-2.02 mg kg(-1) in the different treatments. Soil microbial C and N, enzyme activities, AWCD value, and Shannon-Weaver and Simpson indices declined by about 28.9-76.2%, 14.9-59.0%, 4.9-22.7%, 23.0-42.0% and 1.8-18.7%, respectively. Soil microbial activity was positively correlated with soil PAE concentration, and soil PAE concentrations were impacted by plastic color and residue volume. Correlations among, and molecular mechanisms of, plastic film residues, PAE occurrence and microbial activity require further study.
authors.affiliation: Chongqing Research Academy of Environmental Sciences, Chongqing 401147, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.affiliation: Chongqing Research Academy of Environmental Sciences, Chongqing 401147, China.
authors.forename: Shenghong
authors.initials: S
authors.lastname: Lv
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Manyun
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Chongqing Research Academy of Environmental Sciences, Chongqing 401147, China.
authors.forename: Gangcai
authors.initials: G
authors.lastname: Chen
authors.affiliation: Karst Dynamics Laboratory, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China.
authors.forename: Tongbin
authors.initials: T
authors.lastname: Zhu
authors.affiliation: Chongqing Research Academy of Environmental Sciences, Chongqing 401147, China.
authors.forename: Shen
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. Electronic address: yteng@issas.ac.cn.
authors.forename: Ying
authors.initials: Y
authors.lastname: Teng
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Peter
authors.initials: P
authors.lastname: Christie
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Luo
mesh_terms: D000383:Agriculture; D002244:Carbon / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010795:Phthalic Acids / Q000032:analysis*; D010969:Plastics / Q000633:toxicity*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D010795:Phthalic Acids; D010969:Plastics; D012987:Soil; D012989:Soil Pollutants; C032279:phthalic acid; D002244:Carbon; D009584:Nitrogen
keywords: Enzyme activities; Phthalates; Plastic film mulching; Soil microorganisms