Sewage sludge compost fertilizer effect on maize yield and soil heavy metal concentration
Studies were conducted to determine the use of an organic residue (sewage sludge compost) for four years (1996-1999), to study effects of sewage compost on crop yield and chemical properties of soil under field condition. Productivity studies showed that the greatest growth is obtained in mixed II treatment (12000 kg/ha sewage sludge compost plus 350 kg/ha urea) with 20 % more than mineral fertilization, followed by mixed 1 (8000 kg/ha sewage sludge compost plus 350 kg/ha urea) with 10 % more than mineral fertilization. No toxic effects arising from the heavy metals in the plant were observed. Moreover, the concentration of heavy metals in the soil are below Spanish and European legal limits.
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| Main Authors: | , , , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Universidad Nacional Autónoma de México
2002
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| Subjects: | Sewage sludge, Reusing, Fertilization, Production, Heavy metals, Maize, |
| Online Access: | http://hdl.handle.net/20.500.12792/1031 http://hdl.handle.net/10261/289655 |
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| Summary: | Studies were conducted to determine the use of an organic residue (sewage sludge compost) for four years (1996-1999), to study effects of sewage compost on crop yield and chemical properties of soil under field condition. Productivity studies showed that the greatest growth is obtained in mixed II treatment (12000 kg/ha sewage sludge compost plus 350 kg/ha urea) with 20 % more than mineral fertilization, followed by mixed 1 (8000 kg/ha sewage sludge compost plus 350 kg/ha urea) with 10 % more than mineral fertilization. No toxic effects arising from the heavy metals in the plant were observed. Moreover, the concentration of heavy metals in the soil are below Spanish and European legal limits. |
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