| dc.contributor.author | Vanlauwe, Bernard |
| dc.contributor.author | Dendooven, L. |
| dc.contributor.author | Merckx, R. |
| dc.date.accessioned | 2019-12-04T11:33:15Z |
| dc.date.available | 2019-12-04T11:33:15Z |
| dc.date.issued | 1994 |
| dc.identifier.citation | Vanlauwe, B., Dendooven, L. & Merckx, R. (1994). Residue fractionation and decomposition: the significance of the active fraction. Plant and Soil, 158, 263-274. |
| dc.identifier.issn | 0032-079X |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/5584 |
| dc.description.abstract | This paper describes an incubation experiment with homogeneously 14C labeled maize-straw and its insoluble fraction. The role of the soluble fraction in the decomposition process was assessed, using three independently measured characteristics: (1) fractionation of the maize-straw, resulting in kinetically different fractions; (2) microbial biomass C and its 14C activity determined by a fumigation extraction method, and (3) the 14C activity of the released CO2-C. The fumigation extraction method was proved to be useful from 9 days after the application of the maize-straw onwards. The fractionation method yielded a soluble (48%), a (hemi) cellulosic (47%), and a lignin fraction (1%). Nine days after addition of either the complete residue or its insoluble fraction, the microbial biomass C increased from 53 to 337 and 217 mg C kg-1 dry soil, respectively. Similar values were maintained up to day 40. The large increase in microbial activity was accompanied by a N-immobilization of 65 and 29 mg N Kg-1 dry soil for the maize-straw treatment and its insoluble fraction, respectively, resulting in biomass C/N values of 5.5 and 5.6 A genuine priming effect (10 and 7% of the total CO2-C production) on the mineralization of native soil organic C was caused by an increase in decomposition of the native C rather than by an increase in turnover of the microbial biomass in the soil amended with maize straw. The soluble fraction caused a 'priming effect' on the decomposition of the less decomposable cell-wall fraction. Calculations by nonlinear regression confirmed this observation. |
| dc.language.iso | en |
| dc.subject | Maize |
| dc.subject | Yields |
| dc.subject | Decomposition |
| dc.subject | Soil |
| dc.title | Residue fractionation and decomposition: the significance of the active fraction |
| dc.type | Journal Article |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.contributor.affiliation | Katholieke Universiteit, Leuven |
| cg.contributor.affiliation | University of Exeter |
| cg.coverage.region | Africa |
| cg.coverage.region | Acp |
| cg.coverage.region | West Africa |
| cg.coverage.region | Europe |
| cg.coverage.country | Nigeria |
| cg.coverage.country | Belgium |
| cg.coverage.country | United Kingdom |
| cg.isijournal | ISI Journal |
| cg.authorship.types | CGIAR and advanced research institute |
| cg.iitasubject | Food Security |
| cg.iitasubject | Maize |
| cg.iitasubject | Soil Fertility |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 104864 |
