EDAFOLOGIA, Vol. 10 (2), pp. 191-195, 2003
EFECTO DEL RIEGO SOBRE LA SUPERVIVENCIA DE COLIFORMES EN SUELOS DEGRADADOS ENMENDADOS CON LODO DE DEPURADORA
F. GARCÍA ORENES, I. GOMEZ LUCAS, J. MATAIX-SOLERA, C. GUERRERO, J. NAVARRO PEDREÑO, J. MATAIX-BENEYTO
Dept. de Agroquímica y Medio Ambiente, Universidad Miguel Hernández, Avda. del Ferrocarril s/n, E-03202-Elche, Alicante (SPAIN). Tel.: +34-966658948; Fax: +34-966658532. E-mail: [email protected]
In this paper we describe the effect of irrigation on the survival of total coliforms in two different soils, one agricultural and the other a degraded soil from a semiarid area. Sewage sludge was applied in the proportion of 50g of sludge per kg of soil. The absence of irrigation produced a sharp decre- ase in the number of total coliforms in both soils with the bacteria disappearing completely after 33 days in degraded soil and 40 days the agricultural soil. Irrigation produced a substantial initial increase in the number of coliforms in both soils, but after 80 days it is not observed coliforms development in both soil
Key words: sewage sludge, total coliforms, soil