Effect of Different Tannery Sludge Composts on the Production of Ryegrass: A Pot Experiment

Background: Tannery industry produces high amounts of nutrient rich sludges that can be used as organic fertilizers. Objective: The aim this study was to evaluate the fertilizing potential composted tannery sludge. Methods: A pot experiment carried out with ryegrass ( Lolium perenne L.) test two different composts: 2.0 kg dry matter (DM) fatty sludge + 1.5 DM sheep manure wheat straw (Compost 1) and 2). Five treatments, three replicates each, were assigned: Control (C); Compost 1 at 6 t (C1-6) 12 (C1-12) ha -1 ; 2 (C2-6) (C2-12) . Each treatment applied in a mixed 5 sieved soil (<2 mm). Results: Results showed production ranged between 1.2 for C1-6 2.4 C2-12. highest B, Na N levels observed C2-12, 175 mg DM, 9 g 30 respectively. At end no differences treatments C, N, P O , K levels. Differences Zn level 101 71 Conclusion: C2-12 best because induces higher nutrients without dangerous concentration heavy metals soil. Composted waste from is good source agriculture.