Lead and Cadmium Availability and Uptake by Rice Plant in Response to Different Biosolids and Inorganic Fertilizers

Abstract

Problem Statement: Contents of heavy metals in soil are very important because soil is the first link in the food chain. Approach: But, pay attention to importance the subject, we performed this project to investigate the lead (Pb) and Cadmium (Cd) availability and uptake by rice plant in response to different biosolids Municipal Solid Waste (MSW), Vermicompost (VC) and inorganic Fertilizers (CF) using split plot arrangement based on randomized complete block design with three replications in 2008. Results: The results showed that fertilizer and application periods treatments influenced Pb and Cd accumulation. The highest available Pb (4.89 ppm) and Cd (0.173 ppm) belong to 3 years application of 40 ton.ha^-1 MSW +1/2 CF treatment. During 3 years application of 20 ton.ha^-1 MSW+1/2 CF the most Pb accumulated in root. Conclusion: The maximum Pb uptake by shoot and grain happened in 40 ton.ha^-1 MSW treatment. With application 40 ton.ha^-1 VC +1/2 CF, the maximum Cd accumulated in root. During 3 years application of 40 ton.ha^-1 MSW and 20 ton.ha^-1 VC the highest Cd uptaked by shoot. While, the maximum Cd concentration in grain belong to 20 ton.ha^-1 MSW +1/2CF and CF treatments when added to soil for 3 continuous years.