Phytomanagement of metal-contaminated agricultural land using sunflower, maize and tobacco

作者：Faessler Erika; Robinson Brett H; Stauffer Werner; Gupta Satish K; Papritz Andreas; Schulin Rainer

来源：Agriculture Ecosystems & Environment, 2010, 136(1-2): 49-58.

DOI：10.1016/j.agee.2009.11.007

• Long-term field experiment
• Elemental sulphur
• NTA
• Phytoextraction
• Phytomanagement

We investigated the long-term effectiveness of phytomanagement (the combination of profitable crop production with the gradual reduction Of Soil contamination by phytoextraction) to deal with moderately metal-contaminated agricultural land. In a 6-year field experiment, we grew maize (Zea mays L), sunflower (Helianthus annuus L.) and tobacco (Nicotiana tabacum L.) in crop rotation. The addition of elemental sulphur(2136 kg ha(-1) yr(-1)) decreased the soil pH from 7.4 to 6.7, increased the Zn accumulation by maize, sunflower and tobacco by factors of 1.3, 1.4 and 1.2, respectively, and increased the Cd accumulation by tobacco 1.3-fold. Neither the addition of ammonium sulphate (129 kg ha(-)1 yr(-1)) nor nitrilotri acetic acid (NTA, 430 kg ha(-1) yr(-1)) significantly increased phytoextraction. The results show that phytoextraction for soil cleansing would require centuries. However, this land could be used to generate profitable crops, including the production of safe (low Cd) stock fodder fortified with Zn, green manure for micronutrient-deficient soils, or bioenergy.

• 出版日期2010-2-15