{"id":3346,"date":"2019-04-02T09:00:40","date_gmt":"2019-04-02T07:00:40","guid":{"rendered":"https:\/\/ist.blogs.inra.fr\/afs\/?p=3346"},"modified":"2019-03-27T12:03:46","modified_gmt":"2019-03-27T11:03:46","slug":"nitrogen-addition-method-affects-growth-and-nitrogen-accumulation-in-seedlings-of-four-subtropical-tree-species-schima-superba-gardner-champ-pinus-massoniana-lamb-acacia-mangium-willd-and","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2019\/04\/02\/nitrogen-addition-method-affects-growth-and-nitrogen-accumulation-in-seedlings-of-four-subtropical-tree-species-schima-superba-gardner-champ-pinus-massoniana-lamb-acacia-mangium-willd-and\/","title":{"rendered":"Nitrogen addition method affects growth and nitrogen accumulation in seedlings of four subtropical tree species: Schima superba Gardner &amp; Champ., Pinus massoniana Lamb., Acacia mangium Willd., and Ormosia pinnata Lour"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p align=\"justify\">N addition (56, 156, and 206 kg N ha<sup>\u22121<\/sup> yr<sup>\u22121as<\/sup> dissolved NH<sub>4<\/sub>NO<sub>3<\/sub>) method (canopy vs soil) did not affect the biomass of N<sub>2<\/sub>-fixers (<em>Acacia mangium<\/em> Willd. and <em>Ormosia pinnata<\/em> Lour.), but significantly affected the biomass of non-N<sub>2<\/sub>-fixers (<em>Schima superba<\/em> Gardner &amp; Champ., <em>Pinus massoniana<\/em> Lamb.). Coniferous species exposed to N addition on the canopy rather than the soil had higher N accumulation.<\/p>\n<p align=\"justify\"><strong>Context<\/strong> Previous experiments simulating nitrogen (N) addition in forests were conducted by adding N fertilizer directly to soils, which neglects the fact that N uptake can be done by canopy leaves.<br \/>\n<strong>Aims<\/strong> The objective of this study is to examine how different N addition methods (canopy vs soil) affect growth and N accumulation of four subtropical tree seedlings.<br \/>\n<strong>Methods<\/strong> An open-air greenhouse experiment was conducted to expose four tree species (<em>Schima superba<\/em> Gardner &amp; Champ., <em>Pinus massoniana<\/em> Lamb., <em>Acacia mangium<\/em> Willd. and <em>Ormosia pinnata<\/em> Lour.) to different N addition methods (canopy or soil) and N levels (ambient, medium, or high).<br \/>\n<strong>Results<\/strong> N addition method affected the biomass of non-N<sub>2<\/sub>-fixers (<em>Schima superba<\/em> Gardner &amp; Champ. and <em>Pinus massoniana<\/em> Lamb.), while N<sub>2<\/sub>-fixers (<em>Acacia mangium<\/em> Willd. and <em>Ormosia pinnata<\/em> Lour.) were unaffected. N concentrations in the soils and leaves of all trees were significantly increased by the medium and high N additions, and soil N concentrations resulted from N addition via soil rather than the canopy. Although leaf N concentration was significantly affected by N addition method in all trees except for <em>Ormosia pinnata<\/em>, only N accumulation in <em>Pinus massoniana<\/em> was significantly affected by N addition method.<br \/>\n<strong>Conclusion<\/strong> N addition method affected the biomass of non-N<sub>2<\/sub>-fixers and N accumulation in coniferous species, while it did not affect the biomass of N<sub>2<\/sub>-fixers and N accumulation in broadleaf species.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nSoil N addition, Canopy N addition, N accumulation, N<sub>2<\/sub>-fixers, Subtropical trees<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-019-0806-2'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nWu, T., Lin, W., Li, Y. et al. Annals of Forest Science (2019) 76: 23. <a href=\"https:\/\/doi.org\/10.1007\/s13595-019-0806-2\">https:\/\/doi.org\/10.1007\/s13595-019-0806-2<\/a><\/p>\n<p>For the read-only version of the full text: <a href=\"https:\/\/rdcu.be\/bthfv\">https:\/\/rdcu.be\/bthfv<\/a><\/p>\n<p align=\"justify\">\n<p align=\"justify\"><strong>Data availability<\/strong><br \/>\nThe datasets generated during and\/or analyzed during the current study are available from the corresponding author on reasonable request.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>N addition (56, 156, and 206 kg N ha\u22121 yr\u22121as dissolved NH4NO3) method (canopy vs soil) did not affect the biomass of N2-fixers (Acacia mangium Willd. and Ormosia pinnata Lour.), but significantly affected the biomass of non-N2-fixers (Schima superba Gardner &amp; Champ., Pinus massoniana Lamb.). Coniferous species exposed to N addition on the canopy rather [&hellip;]<\/p>\n","protected":false},"author":106,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-3346","post","type-post","status-publish","format-standard","hentry","category-article-type","category-research-paper","cat-14-id","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/users\/106"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=3346"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3346\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=3346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=3346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=3346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}