1. INTRODUCTIONFeed cost represents about 60-70% of the total costs of poultry production with three fourths of this cost being allotted to maintenance needs and the remainder for productive purpose. Accordingly, many attempts have been undertaken to reduce the cost of feeds and improve feed conversion efficiency by supplementing diets with enzyme preparation.The major ingredients used in poultry feeds are of plant origin. About two –thirds of the phosphorus (P) in these feedstuffs is present as phytate P, which is poorly utilized by poultry. The inability of poultry to utilize phytate P causes economical and environmental problems. The large amount of P in animal waste is creating environmental problems in many parts of the world especially where large concentrations of domestic animals are reared.Another aspect of this problem is supplementing poultry diets with expensive inorganic source of phosphorus for animal. Thus any attempt to improve the utilization of phytate P in Japanese quail chickens could reduce feed costs and P pollution.Sebastian et al. (1998) discussed the effect of phytate molecule on protein and energy utilization and its inhibitory effects on proteolytic and energetic enzymes such as pepsin, trypsin and α-amylase and concluded that Phytase improved protein and energy utilization of chick’s diets.Lyons and Jaceques, (1987) studied the effect of low and high-energy diets with the addition of enzyme on the berformance of broiler chicks and found that response was greater on the low energy diet.Phytase supplementation to a low Apparent metabolizable energy (AME) wheat based diet for broiler improved AME by 5.3% and nitrogen digestibility by 3.2% (Ravindran, 1999), as well as the utilization of N, P, Ca and Zn (Zanini and Sazzad, 1999).Therefore, the aim of the present study was to investigate the effect of supplemnting different levels of phytase in the diet of Japanese quail, differin energy level and its effect on the performance and efficiency of feed utilization and digestibility as well as some carcass traits. 5. The content and uptake of Cd or Pb by shoots and roots for both plants significantly decreased with addition of any soil amendments. The highest decreases were obtained with the application of compost, while the lowest decreases were obtained with Zn-EDTA treatment.6. The content and uptake of Cd or Pb by red radish was much more pronounced in roots and shoots than that in kenaf plants. Also, most of Cd or Pb taken up by red radish plants was retained in the roots and consequently less Cd or Pb transported to the shoots. However, the content and uptake of Cd or Pb by shoots of kenaf plants was higher than by roots, indicating the ability of plants to transport more Cd or Pb to the shoots and consequently minimize the adverse effect of Cd or Pb on root growth.7. Application of soil amendments, except liming, decreased soil pH under all levels of applied Cd or Pb comparing with un-amended soil. There were slightly differences among the pH. Zn-EDTA application gave the lowest pH values whereas liming gave the highest pH values.8. The values of pH obtained under the kenaf plants slightly increased than obtained under red radish plants, mainly attributed to the plant species and its root exudates.9. The highest values of total, available and availability index of Cd or Pb in soil were pronounced at the highest concentration of Cd or Pb under all the studied soil amendments compared with the unamended one. On the other hand, the used soil amendments led to a significant decrease in available and availability index of Cd or Pb, as compared with the unamended one, being organic compost was the best soil amendments.10. The amount of available and availability index of Cd or Pb after harvesting of red radish plants was lower than that after harvesting of kenaf plants, and in turn reflected on plant uptake.