Effects of methamidophos on cellulolytic activity in three soils

Ismail Sahid, A. Razak-Hamid, O. Omar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Methamidophos in an equivalent concentration of either 0.5 or 2.0 ppm was thoroughly mixed with soil 1 (loamy sand), soil 2 (clay) and soil 3 (clay loam). Experiments using soils 1 and 2 were carried out in the greenhouse, and the soil 3 investigation was carried out under field conditions. The cellulosic materials were either buried 4 cm or placed on the soil surface. In soil 1, 2 ppm methamidophos reduced the decomposition of cellulosic material by 41 and 55% of the untreated control, at the soil surface or buried in soil, respectively, at 12 weeks incubation. In soils 2 and 3, methamidophos at 2 ppm did not reduce the mass loss of the substrates either placed on the soil surface or buried in the soil. The carboxymethyl cellulase (CMCase) activity extracted from the substrates on soil 1 treated with 2 ppm methamidophos was reduced by 37.5 and 16% of the untreated control, at 6 or 12 weeks, respectively. The activity was not affected in soil 2, when the substrates were placed either on the soil surface or buried 4 cm. In soil 3, CMCase activity of the substrate was reduced by 25% when the substrates were placed on the soil surface at 6 weeks incubation. Other treatments did not affect CMCase activity significantly.

Original languageEnglish
Pages (from-to)27-38
Number of pages12
JournalCytobios
Volume1999
Issue number390
Publication statusPublished - 1999

Fingerprint

methamidophos
Soil
soil
soil surface
substrate
endo-1,4-beta-glucanase
cellulosic materials
buried soils
effect
incubation
clay
loamy sand
clay loam
loamy sand soils

Keywords

  • Cellulose decomposition
  • Insecticide
  • Methamidophos

ASJC Scopus subject areas

  • Aquatic Science
  • Cell Biology

Cite this

Sahid, I., Razak-Hamid, A., & Omar, O. (1999). Effects of methamidophos on cellulolytic activity in three soils. Cytobios, 1999(390), 27-38.

Effects of methamidophos on cellulolytic activity in three soils. / Sahid, Ismail; Razak-Hamid, A.; Omar, O.

In: Cytobios, Vol. 1999, No. 390, 1999, p. 27-38.

Research output: Contribution to journalArticle

Sahid, I, Razak-Hamid, A & Omar, O 1999, 'Effects of methamidophos on cellulolytic activity in three soils', Cytobios, vol. 1999, no. 390, pp. 27-38.
Sahid, Ismail ; Razak-Hamid, A. ; Omar, O. / Effects of methamidophos on cellulolytic activity in three soils. In: Cytobios. 1999 ; Vol. 1999, No. 390. pp. 27-38.
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AB - Methamidophos in an equivalent concentration of either 0.5 or 2.0 ppm was thoroughly mixed with soil 1 (loamy sand), soil 2 (clay) and soil 3 (clay loam). Experiments using soils 1 and 2 were carried out in the greenhouse, and the soil 3 investigation was carried out under field conditions. The cellulosic materials were either buried 4 cm or placed on the soil surface. In soil 1, 2 ppm methamidophos reduced the decomposition of cellulosic material by 41 and 55% of the untreated control, at the soil surface or buried in soil, respectively, at 12 weeks incubation. In soils 2 and 3, methamidophos at 2 ppm did not reduce the mass loss of the substrates either placed on the soil surface or buried in the soil. The carboxymethyl cellulase (CMCase) activity extracted from the substrates on soil 1 treated with 2 ppm methamidophos was reduced by 37.5 and 16% of the untreated control, at 6 or 12 weeks, respectively. The activity was not affected in soil 2, when the substrates were placed either on the soil surface or buried 4 cm. In soil 3, CMCase activity of the substrate was reduced by 25% when the substrates were placed on the soil surface at 6 weeks incubation. Other treatments did not affect CMCase activity significantly.

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