الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The present work was conducted to investigate the effect application of three different organic waste materials on physical and chemical characteristics of the sandy soil, to evaluate the growth parameters and vegetative yield of Sorghum virgatum plant. Also, Elementary analysis of Sorghum plant was carried out to provide information on Fe, Zn, Cu, Co and Pb accumulation under the effect of different treatment. Investigation of the primary metabolic products to indicate how far the economic potentialities of such graminaceous plant as a source of fiber, fodder and other purposes.The obtained results could be summarized as follows:Addition of the sewage sludge, municipal wastes , and farmyard manure to the sandy soil improved its physical and chemical characters through increasing the percentages of fine fractions ( fine, sand, silt and clay ) , porosity and water holding capacity , organic carbon, fertility , chloronity and pH value .Both the leaves assimilating surface area and the shoot biomass showed a tendency to increase with increasing the rate of sewage sludge mixed with the soil.Relative growth rate (RGR), relative assimilating surface growth rate(RASGR) and net assimilation ratio ( NAR) were generally higher at early stage of vegetative growth than at maturity and attained their peaks after 6 weeks with applying 5 and 10% sewage sludge .Vegetative growth measurements, as affected by application of municipal solid wastes, appeared to increase with advancement of age till the fruiting stage (at the 19 th week).The plant height, number of leaves, number of branches, assimilating surface area and biomass content attained their maximum values at the applying rate 1% farmyard manure. RGR, RASGR and NAR showed gradual increase with age progress till maturity.Heavy metals accumulation showed progressive increase with increasing the rate of application of the different organic wastes and this reflect the increased concentrations of these metals in the treated soil.Sorghum virgatum root had potential to accumulate higher concentrations of minerals than the shoot.<Total ash content, water soluble ash and acid insoluble ash were found with higher values with applying 5% FYM, while crude fiber content obtained when treated the soil with MSW and SS. The highest total lipids content was recorded at rate 1% SS. The maximum soluble sugars and total carbohydrate content was detected in the plant at treatment rate 1% MSW.The highest nutritive vale of S. virgatum attained at rate 1% of the three different organic waste materials. The nutritive value tended to decrease with increasing rate of application of the solid wastes.Sorghum virgatum plant accumulated heavy metals in leaves more than in roots and considered as heavy metals hyperaccumulating plant. Solid organic wastes affected greatly the genomic DNA of Sorghum virgatum as clarified from the RAPD-PCR.Also the protein profile of Sorghum virgatum plant was change due to the application of solid organic wastes as fertilizers the change in both DNA and protein might be induced by the mutagenic effect of heavy metals from the solid organic wastes used in their experiment.The solid organic wastes exhibit several benefits such as improving of physical and chemical characters of soil, increasing productivity of Sorghum virgatum plant. On the other hand, solid organic wastes have some harmful effects on soil environment such as increasing the soil pH, accumulation of heavy metals in the plants which altering protein synthesis and DNA structure and may induce mutation. Consequently, further future ecological studies should bring the view to the ideal utilization of these wastes with out side effect on the environment.