{"id":1788,"date":"2020-06-13T08:21:00","date_gmt":"2020-06-13T08:21:00","guid":{"rendered":"http:\/\/jenaexperiment.uni-jena.de\/?p=1788"},"modified":"2020-08-25T08:47:47","modified_gmt":"2020-08-25T08:47:47","slug":"new-publication-from-lama-et-al-in-biology-and-fertility-of-soils-the-biodiversity-n-cycle-relationship-a-15n-tracer-experiment-with-soil-from-plant-mixtures-of-varying-diversity-to-model-n-pool","status":"publish","type":"post","link":"https:\/\/the-jena-experiment.de\/index.php\/2020\/06\/13\/new-publication-from-lama-et-al-in-biology-and-fertility-of-soils-the-biodiversity-n-cycle-relationship-a-15n-tracer-experiment-with-soil-from-plant-mixtures-of-varying-diversity-to-model-n-pool\/","title":{"rendered":"New publication from Lama et al. in Biology and Fertility of Soils: The biodiversity &#8211; N cycle relationship: a 15N tracer experiment with soil from plant mixtures of varying diversity to model N pool sizes and transformation rates"},"content":{"rendered":"\n<h2 id=\"Abs1\">Abstract<\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/image-17.png\" alt=\"\" class=\"wp-image-1789\" width=\"252\" height=\"165\" srcset=\"\/wp-content\/uploads\/image-17.png 988w, \/wp-content\/uploads\/image-17-300x196.png 300w, \/wp-content\/uploads\/image-17-768x502.png 768w, \/wp-content\/uploads\/image-17-530x350.png 530w\" sizes=\"(max-width: 252px) 100vw, 252px\" \/><\/figure><\/div>\n\n\n\n<p class=\"justify\">We conducted a <sup>15<\/sup>N  tracer experiment in laboratory microcosms with field-fresh soil  samples from a biodiversity experiment to evaluate the relationship  between grassland biodiversity and N cycling. To embrace the complexity  of the N cycle, we determined N exchange between five soil N pools  (labile and recalcitrant organic N, dissolved NH<sub>4<\/sub><sup>+<\/sup> and NO<sub>3<\/sub><sup>\u2212<\/sup> in soil solution, and exchangeable NH<sub>4<\/sub><sup>+<\/sup>) and eight N transformations (gross N mineralization from labile and recalcitrant organic N, NH<sub>4<\/sub><sup>+<\/sup> immobilization into labile and recalcitrant organic N, autotrophic nitrification, heterotrophic nitrification, NO<sub>3<\/sub><sup>\u2212<\/sup> immobilization, adsorption of NH<sub>4<\/sub><sup>+<\/sup>) expected in aerobic soils with the help of the N-cycle model <em>Ntrace<\/em>.  We used grassland soil of the Jena Experiment, which includes plant  mixtures with 1 to 60 species and 1 to 4 functional groups (legumes,  grasses, tall herbs, small herbs). The 19 soil samples of one block of  the Jena Experiment were labeled with either <sup>15<\/sup>NH<sub>4<\/sub><sup>+<\/sup> or <sup>15<\/sup>NO<sub>3<\/sub><sup>&#8211;<\/sup>  or both. In the presence of legumes, gross N mineralization and  autotrophic nitrification increased significantly because of higher soil  N concentrations in legume-containing plots and high microbial  activity. Similarly, the presence of grasses significantly increased the  soil NH<sub>4<\/sub><sup>+<\/sup> pool, gross N mineralization, and NH<sub>4<\/sub><sup>+<\/sup>  immobilization, likely because of enhanced microbial biomass and  activity by providing large amounts of rhizodeposits through their dense  root systems. In our experiment, previously reported plant species  richness effects on the N cycle, observed in a larger-scale field  experiment within the Jena Experiment, were not seen. However, specific  plant functional groups had a significant positive impact on the N  cycling in the incubated soil samples.<\/p>\n\n\n\n<h4>Reference:<\/h4>\n\n\n\n<p>Lama, S., Kuhn, T., Lehmann, M.F. <em>et al.<\/em> The biodiversity &#8211; N cycle relationship: a <sup>15<\/sup>N tracer experiment with soil from plant mixtures of varying diversity to model N pool sizes and transformation rates.                     <em>Biol Fertil Soils<\/em>  (2020). <a href=\"https:\/\/doi.org\/10.1007\/s00374-020-01480-x\">https:\/\/doi.org\/10.1007\/s00374-020-01480-x<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract We conducted a 15N tracer experiment in laboratory microcosms with field-fresh soil samples from a biodiversity experiment to evaluate the relationship between grassland biodiversity and N cycling. To embrace&hellip;<\/p>\n","protected":false},"author":2,"featured_media":1790,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,13],"tags":[],"_links":{"self":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/1788"}],"collection":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/comments?post=1788"}],"version-history":[{"count":3,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/1788\/revisions"}],"predecessor-version":[{"id":1944,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/1788\/revisions\/1944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media\/1790"}],"wp:attachment":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media?parent=1788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/categories?post=1788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/tags?post=1788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}