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Published in Agron J 100:611-618 (2008)
DOI: 10.2134/agronj2006.0316
© 2008 American Society of Agronomy
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Long-Term Study of Properties of a Xerofluvent of the Guadalquivir River Valley under Organic Fertilization

Sebastiana Melero Sáncheza,*, Engracia Madejónb, Juan Francisco Herenciaa and Juan Carlos Ruiz-Porrasa

a Inst. de Investigación y Formación Agraria y Pesquera "Las Torres-Tomejil" Seville (IFAPA), Carretera Sevilla-Cazalla de la Sierra Km 12.2. 41200 Alcalá del Río (Seville) Spain
b Inst. de Recursos Naturales y Agrobiologia de Sevilla (IRNAS-CSIC), Avenida Reina Mercedes 10, P.O. Box 1052, 4180 Sevilla, Spain


Figure 1
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  		Fig. 1. (a) Metabolic quotient (qCO2), (b) soil microbial biomass C (Cmic), and (c) Cmic to total organic carbon (TOC) ratio during the experimental period. Significant difference between treatments are indicated with asterisks (P < 0.05). Thin bars represent the standard error of the mean.

 

Figure 2
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  		Fig. 2. Soil enzyme activities during the experimental period: (a) dehydrogenase, (b) protease, (c) β-glucosidase, and (d) phosphatase alkaline. Significant difference between treatments are indicated with asterisks (P < 0.05). Thin bars represent the standard error of the mean.

 

Figure 3
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  		Fig. 3. Ratios of enzyme activities [(a) dehydrogenase, (b) protease, (c) β-glucosidase, and (d) phosphatase alkaline] to soil microbial biomass C (Cmic) during the experimental period. Significant difference between treatments are indicated with asterisks (P < 0.05). Thin bars represent the standard error of the mean.

 




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