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Ahmed Abdelhafez (Assiut Uni.)• 2019 IFPRI Egypt Seminar "Fertilizer policy in Egypt and options for improvements"

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As part of the seminar held by the International Food Policy Research Institute (IFPRI) under the title of " Fertilizer policy in Egypt and options for improvements".

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Ahmed Abdelhafez (Assiut Uni.)• 2019 IFPRI Egypt Seminar "Fertilizer policy in Egypt and options for improvements"

  1. 1. Environmental and Health Impacts of Successive Mineral Fertilization in Egypt Ahmed A. Abdelhafez Faculty of Agriculture, The New Valley University- Egypt
  2. 2. Introduction  Heavy metal contaminated soils are of great concern due to its adverse environmental and health impacts  Heavy metals enter soil from different sources, including, wastes from mines and smelters, atmospheric deposition, animal manures and sewage sludge and mineral fertilizers
  3. 3.  Mineral fertilizers are of great importance for food production. Accordingly, the world demand for mineral fertilizers has increased to meet the increased demand for agricultural production  Mineral fertilizers are produced from soil ores that may contain high concentrations of heavy metals  Consequently, the addition of large amounts of mineral fertilizers to the soil results in the accumulation of heavy metals Introduction
  4. 4.  Consumptions among N, P and K fertilizers in the Egyptian agricultural lands from Ministry of Agriculture and Soil Reclamation [MASR], 2006 0 200 400 600 800 1000 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Consumption,x104tons Year N P K Introduction
  5. 5. 1) Ingestion 2) Inhalation 3) Dermal  Heavy metals exposure pathways Introduction Abdelhafez, A.A. and Ok, Y.S. 2010
  6. 6.  The Hazard Index (HI) is used to determine the adverse health risk of any contaminants. > 1 : Adverse health effects (Worse). < 1 : No adverse health effects (Better).  doseReference pathwaysdifferentviadosesdailyAverage HI Introduction
  7. 7.  The main objectives of the current study are to: - Evaluate the quality of mineral fertilizers (N, P and K) and their detrimental impact on accumulation of heavy metals in soil and plants in Egypt - Assess the potential risks of human health through the exposure to various heavy metals in soil and grain Objectives
  8. 8. Materials and Methods Fertilizer samples: N, P and K fertilizers were collected (n=54) Plant samples: Maize and wheat, each plant was divided to: shoot, root and grain (n=36) Evaluated heavy metals: Pb, Cd, Co and Ni Soil samples: Two locations, tow seasons, different cultivation period: 0, <5, 10 and >20 yrs. Used three depths: 0-30, 30-60 and 60- 120cm (n=144) El-Bustan El-Nubaria
  9. 9.  Input parameters to characterize the ADD and HI values Materials and Methods
  10. 10.  Some chemical and physical properties of the studied soils Results
  11. 11.  Total heavy metal contents in the collected mineral fertilizers Results
  12. 12.  Total contents of heavy metals (mg kg-1) in soil as influenced by the duration time of cultivation Results
  13. 13.  AB-DTPA extractable heavy metals (mg kg-1) in soil as influenced by the duration time of cultivation Results
  14. 14.  Total Pb contents (mg kg-1) in the cultivated plants Results
  15. 15.  Total Cd contents (mg kg-1) in the cultivated plants Results
  16. 16.  HI of the investigated heavy metals in the non calcareous soil cultivated for different durations of time Results
  17. 17.  HI of the investigated heavy metals in the calcareous soil cultivated for different durations of time Results
  18. 18.  All tested mineral fertilizers indicated different levels of accumulation of heavy metals in soils  The concentration of heavy metals in soils and the human health risk are increased with increasing cultivation period  Reduced the use of mineral fertilizer containing heavy metals is critical to reduce pollution and human health risk Conclusion
  19. 19. Environmental and Health Impacts of Successive Mineral Fertilization in Egypt Ahmed A. Abdelhafez Faculty of Agriculture, The New Valley University- Egypt

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