Nitrogen addition results in Medicago sativa switching nitrogen sources
dc.contributor.author | Wang, Yinliu | |
dc.contributor.author | Hasi, Muqier | |
dc.contributor.author | Bu, Dongdong | |
dc.contributor.author | Li, Ang | |
dc.contributor.author | Xue, Jianguo | |
dc.contributor.author | Wang, Changhui | |
dc.contributor.author | Tian, Qiuying | |
dc.contributor.author | Niu, Guoxiang | |
dc.contributor.author | Geng, Qianqian | |
dc.contributor.author | Wang, Lixin | |
dc.contributor.author | Huang, Jianhui | |
dc.contributor.department | Earth Sciences, School of Science | en_US |
dc.date.accessioned | 2023-03-22T21:08:47Z | |
dc.date.available | 2023-03-22T21:08:47Z | |
dc.date.issued | 2021 | |
dc.description.abstract | Background Nitrogen (N) addition may have strong impacts on legume growth and their biological N fixation (BNF), but how legume N acquisition sources respond to N inputs have yet to be comprehensively assessed.Aims We quantified the effects of N addition on the growth and BNF of Medicago sativa and to assess the response of legume N acquisition to N addition.Methods We grew M. sativa in the greenhouse under gradients of added NH4NO3 and analysed the variables that were relative to growth and BNF, such as N concentration, biomass, δ15N values, nodule number, percentage of N derived from the atmosphere (Ndfa%).Results Nitrogen addition had marginal effects on plant biomass production and foliar N concentration. Foliar δ15N value increased with increasing added N, while Ndfa% decreased. The number of nodules formed also decreased with N addition while the nitrogenase (nifH)genecopies per unit nodule mass was not significantly different with N addition.Conclusions These findings indicate that increasing mineral N availability decreases symbiotic investment into BNF, mainly by reducing nodule formation; this was found to have no significant impact on plant growth because the plant changes its N source from BNF-N to mineral N derived from the soil. | en_US |
dc.eprint.version | Author's manuscript | en_US |
dc.identifier.citation | Wang, Y., Hasi, M., Bu, D., Li, A., Xue, J., Wang, C., Tian, Q., Niu, G., Geng, Q., Wang, L., & Huang, J. (2021). Nitrogen addition results in Medicago sativa switching nitrogen sources. Plant Ecology & Diversity, 14(3–4), 183–194. https://doi.org/10.1080/17550874.2021.2007309 | en_US |
dc.identifier.issn | 1755-0874, 1755-1668 | en_US |
dc.identifier.uri | https://hdl.handle.net/1805/32030 | |
dc.language.iso | en_US | en_US |
dc.publisher | Taylor & Francis | en_US |
dc.relation.isversionof | 10.1080/17550874.2021.2007309 | en_US |
dc.relation.journal | Plant Ecology & Diversity | en_US |
dc.rights | Publisher Policy | en_US |
dc.source | Author | en_US |
dc.subject | Biological N fixation | en_US |
dc.subject | N concentration | en_US |
dc.subject | stable isotope | en_US |
dc.subject | δ15N | en_US |
dc.title | Nitrogen addition results in Medicago sativa switching nitrogen sources | en_US |
dc.type | Article | en_US |