Cast production and NIR spectral signatures of Aporrectodea caliginosa fed soil with different amounts of half-decomposed Populus nigra litter - Archive ouverte HAL Access content directly
Journal Articles Biology and Fertility of Soils Year : 2009

Cast production and NIR spectral signatures of Aporrectodea caliginosa fed soil with different amounts of half-decomposed Populus nigra litter

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Abstract

Sub-adult individuals of Aporrectodea caliginosa were incubated for 16 weeks under laboratory cultures in a soil treated with 0%, 10% or 50% of a Populus nigra halfdecomposed leaves, respectively. Growth was maximum in the 50% organic matter treatment and cocoon production occurred. Average soil ingestion rates decreased from 1.56 g/g−1 fresh weight of worm per day−1 in control soil to 1.17 and 0.5 g, respectively, in treatments with 10% and 50% half-decomposed litter. Surface casts never comprised more than 10% of total cast production. Near-infrared spectrometry (NIRS)signatures of digested and noningested soil significantly differed and showed a rather constant effect of digestion, independent of the organic matter content (p<0.01). These results confirm the value of NIRS spectral signatures as indicators of the origin of soil aggregates and biological processes involved in soil aggregation.

Dates and versions

bioemco-00444893 , version 1 (07-01-2010)

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Chi Zhang, Romain Langlest, Elena Velasquez, Anne Pando, Didier Brunet, et al.. Cast production and NIR spectral signatures of Aporrectodea caliginosa fed soil with different amounts of half-decomposed Populus nigra litter. Biology and Fertility of Soils, 2009, 45 (8), pp.839-844. ⟨10.1007/s00374-009-0395-6⟩. ⟨bioemco-00444893⟩
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