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

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.
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https://hal-bioemco.ccsd.cnrs.fr/bioemco-00444893
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Submitted on : Thursday, January 7, 2010 - 2:37:01 PM
Last modification on : Friday, March 29, 2019 - 9:11:56 AM

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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, Springer Verlag, 2009, 45, pp.839-844. ⟨10.1007/s00374-009-0395-6⟩. ⟨bioemco-00444893⟩

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