Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.642.647GilaniS.S. BahmanyarM.A. 4200884A field experiment was conducted to study the effects of Sewage Sludge
(SS), Municipal Waste Compost (MWC) and Vermicompost (VC) with and without
chemical fertilizer (Urea, 50 kg ha-1 + Potassium sulfate,
100 kg ha-1 + Triple super phosphate, 127.5 kg ha-1)
on Soil Microbial Respiration (SMR) and Total Organic Carbon (TOC) in
a soil cropped to soybean. Experiment was arranged in a complete block
design with three replications. Organic amendments were added to soil
at rate of 0 (control treatment), 20 and 40 Mg ha-1. Furthermore
each level of organic fertilizers with ½ normal of chemical fertilizer
was also enriched. Soil samples were taken after one year of fertilization.
Results illustrated that application of organic amendments increased TOC
and SMR and soybean yield compared to control and chemical fertilizer
treatments. Sewage sludge amended soils showed higher SMR, TOC and soybean
yield than that of other organic amendment treatments. An increasing trend
was observed in all studied parameters, as rates of application increased.
All parameters were greater in treatments receiving a combination of chemical
fertilizers and organic amendments (enriched treatments) compared to soils
receiving organic amendments alone. Results obtained by discriminate analysis
indicated that rates of application were more effective to create discriminating
among treatments. This study showed that TOC was significantly correlated
with SMR. Significant correlation was also observed between SMR and soybean
yield.]]>Adediran, J.A., N. de Baets, P.N.S. Mnkeni, L. Kiekens, N.Y.O. Muyima and A. Thys,200320283300Alef, K.,19951995pp: 464-470pp: 464-470Anderson, T.H. and K.H. Domsch,19902 and qD) on microbial biomasses from soils of different cropping histories.]]>22251255Brooks, P.C., A.D. Newcombe and D.S. Jenkinson,198719211217Castellanos, J.Z. and P.F. Pratt,198145354357Doran, J.W. and T.B. Parkin, 19941994pp: 3-21pp: 3-21Doran, J.W., M. Sarrantonio and M.A. Liebig,199656154Eghball, B.,20006420242030Garcia, C., T. Hernandez, F. Costa and B. Ceccanti,199412457466Garcia, C., T. Hernandez, J. Albaladejo, V. Castillo and A. Roldan,199862670676Gilmour, J.T., M.D. Clark and G.C. Sigua,19854913981402Goyal, S., M.M. Mishra, I.S. Hooda and R. Singh,19922410811084Goyal, S., K. Chander, M.C. Mundra and K.K. Kapoor,199929196200Gunapala, N., R.C. Venette, H. Ferris and K.M. Scow,19983019171927Haney, R.L., F.M. Hones, M.A. Sonderson and A.J. Franzluebbers,200133100104ISRIC,1986Islam, K.R. and R.R. Weil,2000556978Kara, E.E., V. Uygur and A. Erel,2006624762480Kaur, K., K.K. Kapoor and A.P. Gupta,2005168117122Kieft, T.L. and L.L. Rosacker,199123563568Killham, K.,1994pp:141-150pp:141-150Min, D.H., K.R. Islam, L.R. Vough and R.R. Weil,200334781799Nannipieri, P., S. Grego and B. Ceccanti,19901990pp: 293-355pp: 293-355Nelson, D.W. and L.E. Sommers,19831983pp: 539-579pp: 539-579Oades, J.M.,198476319337Oberson, A., J.M. Besson, N. Maire and H. Sticher,199621138148Pascual, J.A., C. Garcia, T. Hernandez and M. Ayuso,199724429434Plaza, C., J.C. Garcia-Gil and A. Polo,200718159165Quemada, M. and E. Menacho,200133344346Saviozzi, A., P. Bufalino, R. Levi-Minizi and R. Riffaldi,20023596101Tate, R.L.,1987Dick, R.P.,1992402536Moreno, J.L., T. Hernandez and C. Garcia,199928230237