الفهرس 
Effect of Soil Treatments on Growth and Yield of
Effect of Irrigation with Wastewater on the Growth,Only 14 pages are availabe for public view
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Abstract
Fayqa Abdulla Ashkanani. Effect of irrigation by treated wastewater on growth rates and heavy metals accumulation in lettuce and carrots plants. Unpublished, master of Science in environmental science, University of Ain Shams, Institute of Environment Studies & Research, Dept. of Basic science, 2010.
Two field experiments in 15th October 2007 and 2008 were conducted on Carrot (Root crop) and Lettuce (Leafy crop) plants in a sandy soil in the experiments farm of Al-Outoria Research Farm in State of Qatar. A number of different soil treatments include Calcium Super Phosphate, CSP with two concentrations 250 and 500 kg\fed and soil conditioner (polyacrylamide hydro gel, PAMG) to reduce the hazard effects of some injurious ions. Samples were taken for growth parameters studies and chemical determination for both plants in both seasons.
The results could be summarized as follow:
The present investigation aimed to reduce the hazard effects of some injurious ions (heavy metals, nitrate and nitrite) which produced from irrigation by treated wastewater in carrot (root crop) and lettuce (leafy crop).
A number of different soil treatment include calcium super phosphate, SPC at two concentration (250 and 500 kg/fed) and soil conditioner (polyacrylamide hydrogel PAMG, at two concentration (40 and 80 Kg/fed). two experiments (15th October 2007&2008) were carried out on sandy soil in the experiments of Al-Outoria farm in state of Qatar in a controlled greenhouse. Samples were taken for growth parameters studies and chemical determinations in both plants and seasons.
The data obtained from these studies could be summarized in the following:
1. Calcium super phosphate treatment (CSP1 at reduced rate 250Kg/fed) led to a significant decrease in Fe, Cu, Mn,Cd, Ni and Pb contents of carrot when compared with control.
2. CSP1 and CSP2 treatments induced a significant decrease Fe, Zn, Cu, Ni, Pb and Cd contents in lettuce plant when compared to the control.
3. The Fe, Zn, Pb and Cd concentrations of lettuce leaves were significantly lower than the control throughout all soil treatments.
4. Calcium super phosphate gave significant decrease in Fe, Cu, Mn, Ni, Pb, and Cd, contents of Lettuce stem compared to the control while it is caused insignificant mean value with the Zn content.
5. Polyacrylamide hydrogel (PAMG) treatment led to a significantly decrease in all the heavy metals contents of lettuce stem compared to the control.
6. All soil treatments resulted in markedly significant increase in total chlorophylls compared with control. The highest content of total chlorophylls was obtained by SPC2 treatment.
Key words: carrot, daucus carrot, lettuce, lactuca sativa, super phosphate, polycrylamide, wastewater, heavy metals.