Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions

cg.identifier.doihttps://doi.org/10.1007/s00374-006-0152-zen
cg.isijournalISI Journalen
cg.issn1432-0789en
cg.issue6en
cg.journalBiology and Fertility of Soilsen
cg.reviewStatusPeer Reviewen
cg.subject.ciatBEANSen
cg.subject.ciatSOIL HEALTHen
cg.subject.ciatSOIL INFORMATIONen
cg.volume43en
dc.contributor.authorRondón, Marco Antonioen
dc.contributor.authorLehmann, Johannesen
dc.contributor.authorRamírez, Juanen
dc.contributor.authorHurtado, M.P.en
dc.date.accessioned2014-09-24T08:41:49Zen
dc.date.available2014-09-24T08:41:49Zen
dc.identifier.urihttps://hdl.handle.net/10568/43230
dc.titleBiological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additionsen
dcterms.abstractThis study examines the potential, magnitude, and causes of enhanced biological N2 fixation (BNF) by common beans (Phaseolus vulgaris L.) through bio-char additions (charcoal, biomass-derived black carbon). Bio-char was added at 0, 30, 60, and 90 g kg?1 soil, and BNF was determined using the isotope dilution method after adding 15N-enriched ammonium sulfate to a Typic Haplustox cropped to a potentially nodulating bean variety (CIAT BAT 477) in comparison to its non-nodulating isoline (BAT 477NN), both inoculated with effective Rhizobium strains. The proportion of fixed N increased from 50% without bio-char additions to 72% with 90 g kg?1 bio-char added. While total N derived from the atmosphere (NdfA) significantly increased by 49 and 78% with 30 and 60 g kg?1 bio-char added to soil, respectively, NdfA decreased to 30% above the control with 90 g kg?1 due to low total biomass production and N uptake. The primary reason for the higher BNF with bio-char additions was the greater B and Mo availability, whereas greater K, Ca, and P availability, as well as higher pH and lower N availability and Al saturation, may have contributed to a lesser extent. Enhanced mycorrhizal infections of roots were not found to contribute to better nutrient uptake and BNF. Bean yield increased by 46% and biomass production by 39% over the control at 90 and 60 g kg?1 bio-char, respectively. However, biomass production and total N uptake decreased when bio-char applications were increased to 90 g kg?1. Soil N uptake by N-fixing beans decreased by 14, 17, and 50% when 30, 60, and 90 g kg?1 bio-char were added to soil, whereas the C/N ratios increased from 16 to 23.7, 28, and 35, respectively. Results demonstrate the potential of bio-char applications to improve N input into agroecosystems while pointing out the needs for long-term field studies to better understand the effects of bio-char on BNF.en
dcterms.accessRightsLimited Access
dcterms.available2006-11-24
dcterms.extentpp. 699-708en
dcterms.issued2007-08
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringeren
dcterms.subjectphaseolus vulgarisen
dcterms.subjectbiological nitrogen fixationen
dcterms.subjectrhizobiumen
dcterms.subjectmycorrhizaeen
dcterms.subjectacid soilsen
dcterms.subjectfijación biológica del nitrógenoen
dcterms.subjectsuelo ácidoen
dcterms.typeJournal Article

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