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Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (10): 3311-3318.doi: 10.13287/j.1001-9332.201810.039

• Research paper • Previous Articles     Next Articles

Effects of mulching duration on PAEs accumulation in soil and tobacco leaves in Zunyi, China

ZHANG Xin1, LI Zhi-tao2, CHEN Qiu-shi1, XU Li1, SUN Guang-jun3*, ZHANG Shi-xiang4, JIAO Jia-guo1   

  1. 1College of Resources and Environmental Sciences, Nanjing Agricultural University/Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095,China;
    2Guizhou Branch of Import and Export of China National Tobacco Corporation, Guiyang 550004, China;
    3Guizhou Branch of China National Tobacco Corporation, Guiyang 550004, China;
    4Zhengzhou Tobacco Research Institute, China National Tobacco Corporation, Zhengzhou 450001, China
  • Received:2018-01-15 Online:2018-10-20 Published:2018-10-20
  • Supported by:
    This work was supported by the Science and Technology Project of Guizhou Provincial Corporation of China Tobacco Company ‘Sustainable Tobacco Production (STP) Research and Extension Application’ and the China National Tobacco Corporation Scientific Project (112016AA0380)

Abstract: We examined the effects of the duration of plastic film mulching on the accumulation of phthalate (PAEs) in soils and tobacco to determine the soil pollution distribution characteristics of PAEs under continuous mulch use and the enrichment status in tobacco leaves. Samples of both soils and tobacco leaves were collected from Lianqian Village and Shawan Village of Zunyi. Gas chromatography-mass spectrometry (GC-MS) was used to determine the contents of six preferentially controlled PAEs in samples. The results showed that the six ΣPAEs in all soil and tobacco samples were (2.66 ±0.60) and (3.58±0.64) mg·kg-1, of which the content of DEHP was the highest, followed by DBP, with the sum of those two accounting for 92.7% and 88.9% of ∑PAEs in the soil and tobacco, respectively. The detection rates of DEHP, DBP, DEP, and BBP were 100.0%. The detection rate of DMP was slightly lower, and that of DnOP was the lowest. The content of PAEs in soils and tobacco leaves significantly increased with the increases of mulching years. In the 1-8 years of film mulching, the increases of PAEs were more obvious and tended to be gentle in the later stage. The content of PAEs in soil and tobacco leaves had significant positive correlation with the years of film mulching, indicating that the increase of film mulching years could significantly promote the accumulation of PAEs. There was no significant correlation between the ∑PAEs accumulation between tobacco leaves and soil.