الفهرس 
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Abstract
The present study was conducted to investigate the phytoremediation potential of Brassica juncea for heavy metals polluted soil of El-Gabal-El-Asfar region irrigated with drainage water of the same zone. Several treatments were used in this study based on curement of water and soil with the additives applied either as soil, foliar or both br Water and soil analysis were made before and after curement and applications respectively. Since many difficulties faced us to establish field experiment in this target area, soil and water -#102;-#114;-#111;-#109; El-Gabal-El-Asfar were transferred to the experimental farm of the Faculty of Agriculture, Ain Shams University. Hence, completely randomized pot experiments were designed in two separate and successive experiments. The first experiment was conducted in 2007, whereas the second one was carried out in two successive seasons in 2008 and 2009. The obtained results could be summarized as follow: br First experiment br I-Growth and yield br 1. Soil applications stimulated root length, plant height and number of leaves against foliar treatments. Soil application of EDTA gained significant increase in these characters as well fresh and dry weights of root and shoot above rest of soil or foliar treatments. br 2. Among soil treatments, EDTA significantly stimulated yield production and weight of 100 seeds above the rest of treatments with or without magnetic iron. The effect of foliar humic application, which was almost similar to soil application, significantly achieved higher yield per plant as well weights of 100 seeds against its application in soil. br 3. Sulfur treatment showed the highest seed oil percentage followed by EDTA and foliar application with humic acid especially with magnetic iron addition. br II- Chemical constituents br a) Root system br 1. EDTA treatment gave the highest N and K percentages with or without magnetic iron. Concerning P percentage, plants treated with EDTA showed the highest percentage for soil applications in presence of magnetic iron. Meanwhile, citric acid treatment was the best among all treatments in increasing P percentage, particularly, with magnetic iron. br 2. Foliar application treatments generally enhanced micronutrient, heavy metals and Na concentrations in the root especially with humic acid compared with soil application treatments. The presence of magnetic iron with foliar application treatments increased Zn and Mn concentrations compared with soil treatments. br 3. EDTA treatment without adding magnetic iron resulted in enhancing Cd and Na accumulation in the roots. The same trend was noticed with EDTA + magnetic iron for Pb total amount. Adding sulfur alone led to accumulate Fe, Cu and Cd, while the accumulation of Mn, Zn and Pb happened in the absence or presence of magnetic iron. as compared with other treatments. br b) Shoot system br 1. EDTA treatment gave the highest amount of N, P and K in particular with magnetic iron. br 2. EDTA treatment with or without magnetic iron stimulated the accumulation of micronutrients against the rest of treatments. Furthermore, adding sulfur led to increase Pb percentage in presence or absence of magnetic iron and Cd only in the presence of magnetic iron. br 3. Concerning total nutrient amounts, EDTA and sulfur treatments gave similar trend in enhancing shoot nutrient amounts relative to other treatments. br c) Seeds br 1. Sulfur treatment improved N, P and K percentages, especially, in presence of magnetic iron. It promoted oil percentage of seeds compared with other soil or foliar treatments, except for humic acid foliar which activated K accumulation in the seeds. br 2. Soil application of EDTA and humic acid as foliar led to the production of seeds free of Pb, Cd and Na with magnetic iron addition as well Cu but with or without magnetic iron. Among foliar application citric acid treatment gave the highest percentage of Pb and Cd especially without magnetic iron and Fe with or without magnetic iron. br Second experiment br I. Growth and yield br 1. Generally, combined soil treatments with foliar application of humic stimulated root length plant height and number of leaves as well fresh and dry weights of root and shoot above soil applications singly. Such effect was more pronounced in plants treated with magnetic iron. br 2. Combined treatments in the presence of magnetic iron was the best, followed by soil treatments in the presence of magnetic iron, followed by the combined treatments without magnetic, then soil treatments singly. The treatments came descendingly as follows: EDTA, sulfur and humic acid in soil either for single or combined applications. br 3. Magnetic iron applicated with combined treatments significantly stimulated yield production in terms of number of pods per plant and their weights as well the weight of 100 seeds against the combined treatments without magnetic iron, or soil application either with or without magnetic iron. br 4. In presence of magnetic iron, the combined treatments of EDTA significantly recorded the highest yield. Whereas the other two interactions in presence of magnetic iron came directly after this treatments (sulfur + humic) and (Humic in soil + Humic foliar). These interactions without magnetic came after the previous treatments. br 5. Curement of irrigation water in presence of magnetic iron stimulated growth characters of the plants sprayed with humic acid above EDTA soil treatment without magnetic iron to reach the level of significance for root and shoot dry weights as well yield production not only above EDTA without magnetic but also above those treated with magnetic .Furthermore, the oil percentage gained with this treatment ranged between EDTA and humic soil application in presence of magnetic iron. br 6. Sulfur + humic acid foliar treatment showed the highest seed oil percentage especially with magnetic iron addition at both seasons. br I-Chemical constituents br a) Root system br 1. Single application of EDTA increased N and K contents of the root above the other soil treatments in presence or absence of magnetic iron in both seasons. The combined effect of EDTA with humic acid foliar gave also highest percentages for N and K with or without magnetic iron. Concerning P percentage, plants received humic acid soil + humic acid foliar showed highest percentage above soil applications and other soil interactions either in presence or absence of magnetic iron in both seasons. br 2. Apart -#102;-#114;-#111;-#109; the increase recorded with the combined effect of HAs + HAf for Mn content of root in presence of MI, the combined effect of Sulfur + humic acid foliar generally enhanced micronutrient concentrations in root compared with other treatments. The presence of magnetic iron with combined soil treatments sprayed with humic acid foliar increased most micronutrient concentrations compared with other treatments against those untreated with magnetic iron. br 3. Plants treated with sulfur + humic acid foliar without magnetic iron showed the highest concentrations of Pb and Cd.Also, the single application of Sulfur without magnetic iron activated Pb and Cd accumulation in the roots above those treated with magnetic iron. br 4. Combined treatments of sulfur + humic acid foliar in the presence of magnetic iron clearly increased Na concentration compared to the other interactions. Maximum Na content recorded in plants irrigated with untreated water and sprayed with humic. br b) Shoot system br 1. As in root, EDTA application singly or combined with humic as foliar spray stimulated N and K concentrations in the shoot above the rest of applications. The combined applications surpass the single application either in presence or absence of magnetic iron for both seasons. Magnetic iron stimulated N and K uptake than those without magnetic iron. Also, as in root, the combined application of humic in soil with foliar spray increased P content than the rest of applications in presence or absence of magnetic iron. Soil application of humic either in the presence or absence of magnetic iron achieved high P content compared to other soil treatments. The effect of EDTA or its combination with humic spraying on N and K content reflected itself on their total amount, since these treatments gained higher amounts above single or combined treatments. The effect of the combined treatments on N, P, and K amount surpasses the single applications in particular with magnetic iron. br 2. EDTA as well its combination increased Mn and Zn contents against the rest of applications or interactions, in particular, with magnetic iron. Generally, the total amount of micronutrients of the 2nd season surpasses that obtained in the 1st one. It is obvious that different amendments accumulated greatly Cu in presence of magnetic iron in both seasons .Zn, Mn and Fe achieved also great amounts in presence of magnetic iron against those grown without magnetic iron for different applications in the two seasons. Total amount of micronutrients were higher with EDTA and its combination above the rest of single or combined treatments. br 3. The accumulation of Pb enhanced with sulfur or sulfur + humic acid foliar treatments especially without magnetic iron, but Cd showed active accumulation especially with EDTA+ humic acid foliar and sulfur + humic acid foliar treatments. The highest percentage of Na was noticed with humic acid soil + humic acid foliar followed by humic acid soil for both seasons. br c) Seed br 1. The combined effect of sulfur with humic as foliar spray stimulated N, P and K contents of the seeds above the other applications. br 2. EDTA without magnetic iron gained free Fe seeds in both seasons. The combined effect of humic with EDTA also, without magnetic iron induced Fe and Cu free seeds in both seasons. br 3. Single application for EDTA or combined with humic in presence of magnetic iron induced free seeds for Pb and Cd in both seasons. The combined application of sulfur with humic induced free seeds for Cd in presence of magnetic iron.