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Abstract: cadmium (Cd) is ubiquitous in the human environment and has toxic effect on soil microbial biomass or its activity, including microbial biomass carbon (C_mic), dehydrogenase activity (DHA) and basal respiration (BR), etc., C_mic, DHA, BR were used as bioindicators of the toxic effect of Cd in soil. This study was conducted to determine the effects of Cd on soil microbial biomass and its activity in a paddy soil. The inhibition of microbial biomass and its activity by different Cd concentrations was described by the kinetic model (M1) and the sigmoid dose-response model (M2) in order to calculate three ecological doses of Cd: ED₅₀, ED₁₀ and ED₅. Results showed that M2 was better fit than M1 for describing the ecological toxicity dose effect of cadmium on soil microbial biomass and its activity in a paddy soil. M2 for ED values (mg/kg soil) of C_mic, DHA, BR best fitted the measured paddy soil bioindicators. M2 showed that all ED values (mg/kg) increased in turn with increased incubation time. ED₅₀, ED₁₀ and ED₅ of C_mic with M2 were increased in turn from 403.2, 141.1, 100.4 to 1000.7, 230.9, 144.8, respectively, after 10 d to 60 d of incubation. ED₅₀, ED₁₀ and ED₅ of DHA with M2 increased in turn from 67.6, 6.2, 1.5 to 101.1, 50.9, 41.0, respectively, after 10 d to 60 d of incubation. ED₅₀, ED₁₀ and ED₅ of BR with M2 increased in turn from 149.7, 6.5, 1.8 to 156.5, 50.8, 35.5, respectively, after 10 d to 60 d of incubation. So the ecological dose increased in turn with increased incubation time for M2 showed that toxicity of cadmium to soil microbial biomass and its activity was decreased with increased incubation time.

[1] Adriano, D.C., 1986. Trace Elements in the Terrestrial Environment. Springer, New York, p.533.

[2] Babich, H., Bewley, R.J.F., Stotzky, G., 1983. Application of the ecological dose concept to the impact of heavy metals on some microbe-mediated ecological processes in soil. Arch. Environ. Contam. Toxicol., 12:421-426.

[3] Bewley, R.J.F., Stotzky, G., 1983. Effects of cadmium and zinc on microbial activity in soil. Influence of clay minerals I. Metals added individually. Sci. Total. Environ., 31:41-55.

[4] Brookes, P.C., 1995. The use of microbial parameters in monitoring soil pollution by heavy metals. Biol. Fertil. Soils, 19:269-279.

[5] Brynhildsen, L., Lundgren, B.V., Allard, B., Rosswall, T., 1988. Effects of glucose concentrations on cadmium, copper, mercury and zinc toxicity to a Klebsiellasp. Appl. Environ. Microbiol., 54:1689-1693.

[6] Christine, C.C., 1997. Cd bioaccumulation in carp (Cyprinus carpio) tissues during long-term high exposure: analysis by inductively coupled plasma-mass spectrometry. Ecotoxicology and environment safety, 38:137-143.

[7] Dixon, M., Webb, E.C., 1979. Enzymes. 3rd Edition, Longman, London, p.476.

[8] Doelman, P., Haanstra, L., 1984. Short-term and long-term effects of cadmium, chromium, copper, nickel, lead and zinc on soil microbial respiration in relation to abiotic soil factors. Plant Soil, 79:317-327.

[9] Doelman, P., Haanstra, L., 1989. Short- and long-term effects of heavy metals on phosphatase activity in soils: an ecological dose-response model approach. Biol. Fertil. Soils, 8:235-241.

[10] Ghamry, A.M., Huang, C.Y., Xu, J.M., 2000. Influence of chlorsulfuron herbicide on size of microbial biomass in the soil. J. Environ. Sci., 12(2):138-143.

[11] Giller, K.E., Witter, E., McGrath, S.P., 1998. Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils: a review. Soil Biol. Biochem., 30:1389-1414.

[12] Haanstra, L., Doelman, P., Oude, V.J.H., 1985. The use of sigmoidal dose response curves in soil ecotoxicological research. Plant Soil, 84:293-297.

[13] Jin, W.B., Song, L.H., Dong, X.L., Wang, P., 1998. Determination of the breath intensity of crude polluted soil. Oil and Gas field environment protection, 8(4):33 (in Chinese).

[14] Jose, L.M., Teresa, H., Aurelia, P., Carlos, G., 2002. Toxicity of Cd to soil microbial activity: effect of sewage sludge addition to soil on the ecological dose. Applied Soil Ecology, 21:149-158.

[15] Kandeler, E., Tscherko, D., Bruce, K.D., Stemmer, M., Hobbs, P.J., Bardgett, R.D., Amelung, W., 2000. Structure and function of the soil microbial community in microhabitats of a heavy metal polluted soil. Biol. Fertil. Soil, 32:390-400.

[16] Kostov, O., Van, O., 2001. Nitrogen transformation in copper-contaminated soils and effects of line and compost application on soil resiliency. Biol. Fertil. Soils, 33:10-16.

[17] Lu, R.K., 2000. Analysis of Soil Agricultural Chemistry. Agricultral Press, Beijing, p.638 (in Chinese).

[18] Martinez, C.E., Jacobson, A.R., McBride, M.B., 2003. Aging and temperature effects on DOC and elemental release from a metal contaminated soil. Environmental Pollution, 122:135-143.

[19] Milne, R.M., Haynes, R.J., 2004. Soil organic matter, microbial properties and aggregate stability under annual and perennial pastures. Biol. Fertil. Soils, 39:172-178.

[20] Moreno, J.L., Hernández, T., Garcia, C., 1999. Effect of a cadmium-contaminated sewage sludge compost on dynamic of organic matter and microbial activity in an arid soil. Biol. Fertil. Soils, 28:230-237.

[21] Nannipieri, P., Badalucco, L., Landi, L., Pietramellara, G., 1997. Measurement in Assessing the Risk of Chemicals to the Soil Ecosystem. In: Zelikoff, J.T. (Ed.), Proceedings of the OECD Workshop on Ecotoxicology: Responses and Risk Assessment. SOS Publications, Fair Haven, NJ, USA, p.507-534.

[22] Oliver, M.A., 1997. Soil and human health: a review. Euro. J. Soil Sci., 48:573-592.

[23] Robards, K., Worsfold, P., 1991. Cd: Toxicology and analysis. A Review Analyst, 116:549-568.

[24] Saviozzi, S., Levi, M.R., Riffaldi, R., 1983. How organic matter sources affect cadmium movement in soil. Biocycle, 24:29-31.

[25] Scott, F.J.J., Pedersen, M.B., 1995. Arsenic. In: Soil Quality Criteria for Selected Inorganic Compounds. Vol. 22, Working report No. 48. Danish Environmental Protection Agency, Ministry of Environment and Energy, Copenhagen, p.29-41.

[26] Smith, S.R., 1996. Agricultural Recycling of Sewage Sludge and the Environment. CAB Internaltional, Wallingford.

[27] Speir, T.W., Kettles, H.A., Parshotam, A., Searle, P.L., Vlaar, L.N.C., 1995. A simple kinetic approach to derive the ecological dose value, ED₅₀, for the assessment of Cr (VI) toxicity to soil biological properties. Soil Biol. Biochem., 27:801-810.

[28] Vance, E.D., Brookes, P.C., Jenkinson, D.S., 1987. An extraction method for measuring soil microbial biomass C. Soil Biol. Biochem., 19:703-707.

[29] Yao, H.Y., He, Z.L., Wilson, M.J., Campbell, C.D., 2000. Microbial biomass and community structure in a sequence of soils with increasing fertility and changing land use. Microb. Ecol., 40:223-237.

[30] Yao, H.Y., Xu, J.M., Huang, C.Y., 2003. Substrate utilization pattern, biomass and activity of microbial communities in a sequence of heavy metal-polluted paddy soils. Geoderma, 115:139-148.

[31] Zhang, G.L., Gong, Z.T., 2003. Pedogenic evolution of paddy soils soil landscapes. Geoderma, 115:15-29.

[32] Zhang, H., Zhang, G.L., 2003. Microbial biomass carbon and total oranic carbon of soils as affected by rubber cultivation. Pedosphere, 13:353-357.

[33] Zhu, N.W., 1996a. The effect methamidophos the activities of phosphatase and dehydrogenase in soil. Rural Eco-Environment, 12:22-24, 64 (in Chinese).

[34] Zhu, N.W., 1996b. The study of determination of TTC-Dehydrogenase activity. China Biogass, 14:3-5 (in Chinese).