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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (32): 189-193.doi: 10.11924/j.issn.1000-6850.2014-0391

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The Status Quo of Mulching Film Residues in Representative Regions of Guangdong Province

  

  • Received:2014-02-20 Revised:2014-02-20 Accepted:2014-04-24 Online:2014-11-20 Published:2014-11-20

Abstract: In order to investigate the field residues of mulching film and their relative impact factors in typical areas of Guangdong Province, 2 typical mulching film-crops and 6 mulching film-fields were selected as the investigation samples in Boluo County of Huizhou City. The results showed that significant difference in residues of film was observed among different fields. The film residue was averagely 45.0 kg/hm2 in the 0- 30 cm soil layer in 2013. As compared to 2011, the residue of film in 6 fields showed varied degrees of increase. The film was mainly distributed in the top soil (0-20 cm) which occupied more than 80% of the total. Except for the film, other solid pollutants residues were 0.36-36.4 kg/hm2. Furthermore, the ratio of other solid pollutants residues to the total solid pollutants in different fields showed remarkable difference and the highest value of 70.4% were observed. The residue of other solid pollutant in soil should not be neglected. The film residue depends heavily on the film recovery. In the future, the government should strengthen publicity on the harmful effects of film residues and encourage to draft relative policies on film recovery.