Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions
| cg.identifier.doi | https://doi.org/10.1007/s00374-006-0152-z | en |
| cg.isijournal | ISI Journal | en |
| cg.issn | 1432-0789 | en |
| cg.issue | 6 | en |
| cg.journal | Biology and Fertility of Soils | en |
| cg.reviewStatus | Peer Review | en |
| cg.subject.ciat | BEANS | en |
| cg.subject.ciat | SOIL HEALTH | en |
| cg.subject.ciat | SOIL INFORMATION | en |
| cg.volume | 43 | en |
| dc.contributor.author | Rondón, Marco Antonio | en |
| dc.contributor.author | Lehmann, Johannes | en |
| dc.contributor.author | Ramírez, Juan | en |
| dc.contributor.author | Hurtado, M.P. | en |
| dc.date.accessioned | 2014-09-24T08:41:49Z | en |
| dc.date.available | 2014-09-24T08:41:49Z | en |
| dc.identifier.uri | https://hdl.handle.net/10568/43230 | |
| dc.title | Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions | en |
| dcterms.abstract | This 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.accessRights | Limited Access | |
| dcterms.available | 2006-11-24 | |
| dcterms.extent | pp. 699-708 | en |
| dcterms.issued | 2007-08 | |
| dcterms.language | en | |
| dcterms.license | Copyrighted; all rights reserved | |
| dcterms.publisher | Springer | en |
| dcterms.subject | phaseolus vulgaris | en |
| dcterms.subject | biological nitrogen fixation | en |
| dcterms.subject | rhizobium | en |
| dcterms.subject | mycorrhizae | en |
| dcterms.subject | acid soils | en |
| dcterms.subject | fijación biológica del nitrógeno | en |
| dcterms.subject | suelo ácido | en |
| dcterms.type | Journal Article |