Microbiological and biochemical properties of an agricultural Mexican soil amended with sewage sludge

Revista Brasileira de Ciência do Solo

Renato Armenta¹  Rocio Vaca²  Jorge Lugo¹  Pedro Del Aguila¹ 

[1] ,Universidad Autónoma del Estado de México Facultad de Ciencias Toluca,México

关键词: basal respiration;    biosolids;    enzymatic activities;    metabolic quotient;    microbial biomass;    atividade enzimática;    biomassa microbiana;    biossólidos;    quociente metabólico;    respiração basal;   

DOI  :  10.1590/S0100-06832012000500029

来源: SciELO

【 摘 要 】

The application of sewage sludge is a concern because it may affect the quality of organic matter and microbiological and biochemical soil properties. The effects of surface application of sewage sludge to an agricultural soil (at 18 and 36 t ha-1 dry basis) were assessed in one maize (Zea mays L.) growing season. The study evaluated microbial biomass, basal respiration and selected enzymatic activities (catalase, urease, acid and alkaline phosphatase, and β-glucosidase) 230 days after sewage sludge application and infrared spectroscopy was used to assess the quality of dissolved organic matter and humic acids. Sewage sludge applications increased the band intensity assigned to polysaccharides, carboxylic acids, amides and lignin groups in the soil. The organic matter from the sewage sludge had a significant influence on the soil microbial biomass; nevertheless, at the end of the experiment the equilibrium of the soil microbial biomass (defined as microbial metabolic quotient, qCO2) was recovered. Soil urease, acid and alkaline phosphatase activity were strongly influenced by sewage sludge applications.

【 授权许可】

CC BY   
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