| 李瑾,周涛,张扬,李留标,李崇霄,曹靖.地膜对农田土壤及玉米籽粒邻苯二甲酸酯累积状况的影响[J].农业环境科学学报,2020,39(8):1767-1773. |
| 地膜对农田土壤及玉米籽粒邻苯二甲酸酯累积状况的影响 |
| Effects of plastic film mulching on phthalate esters accumulation in farmland soil and maize grain |
| 投稿时间：2020-01-09 |
| DOI：10.11654/jaes.2020-0038 |
| 中文关键词: 邻苯二甲酸酯（PAEs） 可降解地膜 地膜处理方式 土壤 玉米 |
| 英文关键词: phthalates degradable mulch field mulch treatments soil maize |
| 基金项目:甘肃省废旧农膜回收利用产业技术体系建设项目（2018-11-21） |
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| 中文摘要: |
| 为探讨邻苯二甲酸酯（PAEs）在土壤-植物系统中的残留和累积状况，检测了不同厚度（0.012、0.010、0.008 mm）和不同降解类型地膜中PAEs的含量，动态比较了地膜处理方式（填埋和暴晒）对PAEs在土壤中的残留情况，通过田间试验分析了不同覆膜年限（5、15、25 a）对土壤和玉米籽粒PAEs累积的影响。结果表明： 0.012 mm的加厚地膜PAEs含量高于普通（0.008 mm）地膜，可降解地膜中PAEs的含量高于PE地膜，检出PAEs同系物分别为DMP、DEP、DBP、DEHP和DNOP共5种，其中DBP和DEHP含量较高。大田处理90 d后发现，不同降解类型地膜填埋处理的土壤PAEs含量平均高出暴晒处理1.49倍，表明土壤PAEs含量受地膜处理方式的影响。随着覆膜种植年限的延长，玉米地土壤PAEs累积增加，其中以DBP和DEHP增加最明显。玉米籽粒中仅检测到PAEs同系物DBP，且土壤中PAEs含量与籽粒中的呈显著正相关，说明玉米会吸收土壤中的PAEs并转移到籽粒中。 |
| 英文摘要: |
| In order to investigate the residue and accumulation of PAEs in soil-plant systems, PAE contents of plastic films with different thicknesses(0.012, 0.010, and 0.008 mm)and with different types of degradation were determined. Different methods of film treatment (landfill and exposure)were tested, and the resulting PAE residues in the soil, and their evolution over time, were compared. The effects of different mulching periods(5, 15, and 25 years)on the accumulation of PAEs in soil and maize grains were analyzed through field experiments. The results show that PAEs content in 0.012 mm plastic mulch is higher than that of 0.008 mm plastic mulch and the PAEs contents of degradable plastic mulch are higher than those of non-degradable PE mulch. Five PAE congeners were detected, namely DMP, DEP, DBP, DEHP, and DNOP. Plastic mulch had higher contents of DBP and DEHP than of any other congeners. After a 90-day field treatment, the PAEs contents of soil with different degradation types of plastic film in landfill treatments was, on average, 1.49 times higher than those of exposure treatments, indicating that soil PAEs content was affected by the method of plastic film treatment. With the extension of mulching planting time, the accumulation of PAEs in cornfield soil increased, with DBP and DEHP accumulation increasing most significantly. Of the PAE congeners, only DBP was detected in maize grains, and a significant positive correlation was found between the PAE contents of soil and maize. |
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