Changes in the microbial activity of an arid soil amended with urban organic wastes

Abstract Changes produced in the biological characteristics of an arid soil by the addition of various urban wastes (municipal solid waste, sewage sludge and compost) at different doses, were evaluated during a 360-day incubation experiment. The addition of organic materials to the soil increased the values of biomass carbon, basal respiration, biomass C/total organic C ratio and metabolic quotient (qCO2), indicating the activation of soil microorganisms. These biological parameters showed a decreasing tendency with time. Nevertheless, their values in amended soils were higher than in control soil, which clearly indicates the improvement of soil biological quality brought about by the organic amendment. This favorable effect on soil biological activity was more noticeable with the addition of fresh wastes (municipal solid waste or sewage sludge) than with compost. In turn, this effect was more permanent when the soil was amended with municipal solid waste than when it was amended with sewage sludge.

[1]  T. Hernández,et al.  Biochemical Parameters in Soils Regenerated By the Addition of Organic Wastes , 1994 .

[2]  Carlos García,et al.  Evaluation of urban wastes for agricultural use , 1996 .

[3]  C. Izquierdo.  Estudio del compostaje de residuos orgánicos: valoración agrícola , 1990 .

[4]  D. Jenkinson,et al.  Microbial biomass in soil: measurement and turnover. , 1981 .

[5]  K. Domsch,et al.  The metabolic quotient for CO2 (qCO2) as a specific activity parameter to assess the effects of environmental conditions, such as ph, on the microbial biomass of forest soils , 1993 .

[6]  Richard P. Dick,et al.  Microbial Biomass and Soil Enzyme Activities in Compacted and Rehabilitated Skid Trail Soils , 1988 .

[7]  D. J. Silviera,et al.  Transformations of Carbon, Nitrogen, and Metals in Soils Treated with Waste Materials , 1979 .

[8]  M. Klug,et al.  Current Perspectives in Microbial Ecology , 1985 .

[9]  S. González-Prieto,et al.  Carbon and nitrogen mineralization in an acid soil fertilized with composted urban refuses , 1993 .

[10]  P. Brookes,et al.  Adenylate energy charge measurements in soil , 1987 .

[11]  K. Domsch,et al.  Application of eco-physiological quotients (qCO2 and qD) on microbial biomasses from soils of different cropping histories , 1990 .

[12]  P. Brookes,et al.  Microbial biomass measurements in forest soils: Determination of kC values and tests of hypotheses to explain the failure of the chloroform fumigation-incubation method in acid soils , 1987 .

[13]  Hana Šantr,et al.  On the relationship between specific respiration activity and microbial biomass in soils , 1991 .

[14]  M. Pagliai,et al.  Relationships between soil porosity, root development and soil enzyme activity in cultivated soils , 1993 .

[15]  M. Wood,et al.  Changes in microbial populations following the application of cattle slurry to soil at two temperatures , 1989 .

[16]  J. M. Bremner,et al.  A rapid and precise method for routine determination of organic carbon in soil , 1988 .

[17]  P. Nannipieri,et al.  Ecological significance of the biological activity in soil. , 1990 .

[18]  M. Pagliai,et al.  Influence of waste organic matter on soil micro-and macrostructure , 1993 .

[19]  R. Papendick,et al.  Soil organic matter dynamics and crop residue management. , 1992 .

[20]  J. A. August,et al.  Long‐term consequences of topsoil mining on select biological and physical characteristics of two New Zealand loessial soils under grazed pasture , 1989 .