{"id":3263,"date":"2019-02-27T09:00:34","date_gmt":"2019-02-27T08:00:34","guid":{"rendered":"https:\/\/ist.blogs.inra.fr\/afs\/?p=3263"},"modified":"2019-02-26T17:54:39","modified_gmt":"2019-02-26T16:54:39","slug":"fine-root-morphology-and-growth-in-response-to-nitrogen-addition-through-drip-fertigation-in-a-populus-x-euramericana-guariento-plantation-over-multiple-years","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2019\/02\/27\/fine-root-morphology-and-growth-in-response-to-nitrogen-addition-through-drip-fertigation-in-a-populus-x-euramericana-guariento-plantation-over-multiple-years\/","title":{"rendered":"Fine root morphology and growth in response to nitrogen addition through drip fertigation in a Populus \u00d7 euramericana \u201cGuariento\u201d plantation over multiple years"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p align=\"justify\">Nitrogen addition through drip fertigation to a poplar plantation ( <em>Populus \u00d7 euramericana<\/em> \u201cGuariento\u201d) promoted fine root growth only in the early period. The relationship between root growth and soil N content was positive in the first 2 years, but became negative in the third year when the soil N availability had substantially increased.<\/p>\n<p align=\"justify\"><strong>Context<\/strong> Nitrogen (N) deficiency is common in forest soils, and N addition is sometimes applied in the case of intensive plantations. There is a need to better document the impact of N addition through the high-efficiency fertilization technique on fine root morphology and growth, given their importance for the uptake of nutrients and for tree growth.<br \/>\n<strong>Aims<\/strong> We aimed to quantitatively investigate the responses of fine roots in morphology and growth to N addition through surface drip fertigation over multiple years in a <em>Populus \u00d7 euramericana<\/em> \u201cGuariento\u201d plantation.<br \/>\n<strong>Methods<\/strong> A field experiment that included four drip fertigation treatments with N addition levels (0, 60, 120, and 180 kg N ha\u22121 year\u22121) was conducted for three successive years. A coring method was used to sample soils and quantify the root morphological traits and soil N content along 0\u201360-cm profiles.<br \/>\n<strong>Results<\/strong> The root biomass density, length, surface area, specific length, and tissue density were significantly higher in the N addition treatments than those in the control after the first year, but the positive effect decreased in the second year. In the third year, root biomass in the N addition treatments was even lower by 11\u201339% than that in the control. The relationship between root growth and soil N content was also positive in the first 2 years and negative in the third year.<br \/>\n<strong>Conclusion<\/strong> N addition promoted fine root growth mainly in the shallow soil and in the early period of experiment. The relationship between root growth and soil N content became negative in the third year when the soil N availability had substantially increased. It is suggested that fine roots adjust their growth and morphology in response to N availability varying along the soil profile and with the fertilization duration.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nNitrogen addition, Fine root, Root morphology, Vertical distribution, Drip fertigation, <em>Populus \u00d7 euramericana<\/em> \u201cGuariento\u201d<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-019-0798-y'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nYan, XL., Jia, L. &amp; Dai, T. Annals of Forest Science (2019) 76: 13. <a href=\"https:\/\/doi.org\/10.1007\/s13595-019-0798-y\">https:\/\/doi.org\/10.1007\/s13595-019-0798-y<\/a><\/p>\n<p>For the read-only version of the full text: <a href=\"https:\/\/rdcu.be\/box2T\">https:\/\/rdcu.be\/box2T<\/a><\/p>\n<p><strong>Data availability<\/strong><\/p>\n<p align=\"justify\">The datasets generated and\/or analyzed during the current study are available in the Dryad repository (Yan et al. 2018). Datasets not peer-reviewed. Yan XL, Jia LM, Dai TF (2018) Data from: Fine root morphology and growth in response to nitrogen addition through drip fertigation in a <em>Populus \u00d7 euramericana<\/em> &#8220;Guariento&#8221; plantation over multiple years. Dryad Digital Repository. [Dataset] <a href=\"https:\/\/doi.org\/10.5061\/dryad.3h41m6v\">https:\/\/doi.org\/10.5061\/dryad.3h41m6v<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nitrogen addition through drip fertigation to a poplar plantation ( Populus \u00d7 euramericana \u201cGuariento\u201d) promoted fine root growth only in the early period. The relationship between root growth and soil N content was positive in the first 2 years, but became negative in the third year when the soil N availability had substantially increased. Context [&hellip;]<\/p>\n","protected":false},"author":106,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,110,15],"tags":[],"class_list":["post-3263","post","type-post","status-publish","format-standard","hentry","category-article-type","category-data-in-repository","category-research-paper","cat-14-id","cat-110-id","cat-15-id"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3263","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=3263"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3263\/revisions"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=3263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=3263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=3263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}