›› 2017, Vol. 29 ›› Issue (12): 2091-2096.DOI: 10.3969/j.issn.1004-1524.2017.12.18

• Environmental Science • Previous Articles     Next Articles

Soil environmental quality of typical protected farmlands in Hangzhou

NI Zhongying1, SHI Yijun1, XIE Guoxiong2, ZHANG Mingkui3, *   

  1. 1. Agricultural and Forestry Technology Promotion Center of Tonglu County, Tonglu 311500, China;
    2. Hangzhou Plant Protection and Soil-Fertilizer Station, Hangzhou 310020, China;
    3. College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
  • Received:2017-05-14 Online:2017-12-20 Published:2018-01-08

Abstract: In order to understand soil environmental quality of protected farmlands in Hangzhou, soil samples were collected from 27 representative protected vegetable farmlands to investigate the contents of 8 kinds of heavy metals and 8 kinds of antibiotics, and the obtained data were compared with those of the adjacent open farmlands. The results showed that the average concentrations of soil Cu, Zn, Cd and Pb in the protected farmlands were 17.28%, 18.36%, 25.00%, and 17.82% higher than those of the open farmlands, and the total concentration of the investigated antibiotics in the protected farmlands was 4.91 times of that in the open farmlands. The accumulation of heavy metals and antibiotics in the protected farmlands was higher than that in the open farmland. The average concentrations of soil Cu, Zn, Cr, Pb, Hg and As in the protected farmlands with application of both chemical fertilizers and organic fertilizers were 54.86%, 26.76%, 16.80%, 14.36%, 50.56%, and 9.63% higher than those in the protected lands with application of only chemical fertilizers. The total concentration of investigated antibiotics in the protected farmlands with application of both chemical fertilizers and organic fertilizers was 6.67 times of that in the protected farmlands with application of only chemical fertilizers. The results indicated that application of organic fertilizer containing heavy metals and antibiotics was an important reason for the accumulation of above pollutants in the protected farmlands.

Key words: protected cultivation, soil environmental quality, heavy metals, antibiotics

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