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

Cast production and NIR spectral signatures of #Aporrectodea caliginosa$ fed soil with different amounts of half-decomposed #Populus nigra$ litter Zhang C. auteur aut IRD Langlest R. auteur aut IRD Velasquez E. auteur aut IRD Pando Anne auteur aut IRD Brunet Didier auteur aut IRD Dai J. auteur aut IRD Lavelle Patrick auteur aut IRD text journalArticle eng text/pdf born digital access 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 half-decomposed 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 non-ingested 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. specialized Earthworm casts NIR spectral signature Soil macroaggregates Aporrectodea caliginosa 074 068 Biology and Fertility of Soils 45 8 839-844 2009 0178-2762 https://www.documentation.ird.fr/hor/fdi:010046334 10.1007/s00374-009-0395-6 0178-2762 [F B010046334] https://www.documentation.ird.fr/hor/fdi:010046334 https://www.documentation.ird.fr/intranet/publi/2009/09/010046334.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-10-07 2017-08-23 fdi:010046334 fre