{"id":214,"date":"2014-08-18T11:39:37","date_gmt":"2014-08-18T15:39:37","guid":{"rendered":"http:\/\/www.frfce.qc.ca\/?page_id=214"},"modified":"2014-09-15T10:39:13","modified_gmt":"2014-09-15T14:39:13","slug":"rendement-des-plantations-de-peuplier-hybride-sur-les-terres-agricoles-abandonnees","status":"publish","type":"page","link":"https:\/\/www.frfce.qc.ca\/?page_id=214","title":{"rendered":"Rendement des plantations de peuplier hybride sur les terres agricoles abandonn\u00e9es"},"content":{"rendered":"<p><strong>Mise en contexte<\/strong><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-386 size-full\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe-peuplier-hybride.jpg\" alt=\"Coupe d'un peuplier hybride\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe-peuplier-hybride.jpg 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe-peuplier-hybride-150x150.jpg 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/coupe-peuplier-hybride-50x50.jpg 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><br \/>\nEn raison de leur forte productivit\u00e9, les essences \u00e0 croissance rapide, comme le peuplier hybride, sont un outil int\u00e9ressant pour accro\u00eetre les rendements en bois et en biomasse sur des petites superficies. Toutefois, peu de connaissances ont \u00e9t\u00e9 acquises sur le r\u00e9el potentiel du peuplier hybride \u00e0 fournir d\u2019importantes quantit\u00e9s de bois sur de courtes rotations (environ 15 ans) dans le sud du Qu\u00e9bec. Cette situation s\u2019explique par le fait que les forestiers qu\u00e9b\u00e9cois ont choisi principalement de convertir des for\u00eats naturelles en plantation de peuplier plut\u00f4t que d\u2019opter pour une populiculture bas\u00e9e sur l\u2019afforestation (ou le boisement), c\u2019est-\u00e0-dire la plantation d\u2019arbres l\u00e0 o\u00f9 il n\u2019y pas de for\u00eat.<\/p>\n<p>&nbsp;<\/p>\n<p>L\u2019intensification de l\u2019agriculture au cours des 60 derni\u00e8res ann\u00e9es a fait en sorte que des dizaines de milliers d\u2019hectares de terres agricoles moins productives ont \u00e9t\u00e9 laiss\u00e9es \u00e0 l\u2019abandon un peu partout au Qu\u00e9bec. Ces terres en friche sont souvent de fertilit\u00e9 in\u00e9gale selon les secteurs. Elles offrent donc un potentiel irr\u00e9gulier pour la production intensive de bois ou de biomasse. Il est essentiel de d\u00e9terminer les facteurs environnementaux qui influencent le potentiel de production ligneux des friches agricoles du sud du Qu\u00e9bec. Une fois identifi\u00e9s, ces facteurs peuvent ensuite \u00eatre utilis\u00e9s pour identifier des sites propices \u00e0 la culture du peuplier.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Dispositif de recherche<\/strong><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-125 size-full\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/rendement_peuplier_terre_agricole.png\" alt=\"rendement des peupliers hybrides sur des terres agricoles abandonn\u00e9es\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/rendement_peuplier_terre_agricole.png 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/rendement_peuplier_terre_agricole-150x150.png 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/rendement_peuplier_terre_agricole-50x50.png 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/p>\n<p>En mai 2000, 10 plantations de peuplier hybride ont \u00e9t\u00e9 \u00e9tablies par Benoit Truax chez des propri\u00e9taires priv\u00e9s de\u00a0l&rsquo;Estrie\u00a0et de la Mont\u00e9r\u00e9gie. Ces plantations ont \u00e9t\u00e9 \u00e9tablies le long d\u2019un gradient de climat (ou d\u2019altitude) et de fertilit\u00e9 des sols. Ce dispositif, unique au Canada, s\u2019\u00e9tend des Basses Terres du Saint-Laurent (site de Bedford, 80 m d\u2019altitude), jusqu\u2019aux collines qui bordent le Mont-M\u00e9gantic (site de Stornoway, 450 m d\u2019altitude). Les plantations ont toutes \u00e9t\u00e9 am\u00e9nag\u00e9es de la m\u00eame fa\u00e7on et plant\u00e9es la m\u00eame semaine avec les m\u00eames cultivars (clones) de peuplier hybride. La recette sylvicole utilis\u00e9e pour \u00e9tablir ces plantations a \u00e9t\u00e9 la suivante\u00a0:<\/p>\n<ul>\n<li>Labour et hersage du sol \u00e0 l\u2019automne pr\u00e9c\u00e9dent la mise en terre des plants.<\/li>\n<li>Mise en terre des plants \u00e0 racines nues de peuplier au printemps avec un espacement de 4 x 3 m<br \/>\n(833 tiges\/ha).<\/li>\n<li>R\u00e9pression de la v\u00e9g\u00e9tation concurrente gr\u00e2ce \u00e0 l\u2019application d\u2019un phytocide (glyphosate) sur l\u2019ensemble de la plantation en juin 2000 et entre les rang\u00e9es d\u2019arbres en juin 2001.<\/li>\n<li>Aucune fertilisation n\u2019a \u00e9t\u00e9 r\u00e9alis\u00e9e et aucun r\u00e9pulsif \u00e0 cerf de Virginie n\u2019a \u00e9t\u00e9 employ\u00e9.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Initialement, le dispositif comprenait 9 clones de peuplier hybride et 10 sites. Toutefois, pour l\u2019\u00e9tude du rendement des plantations seulement 8 sites et 5 clones non apparent\u00e9s ont \u00e9t\u00e9 retenus : <em>Populus trichocarpa<\/em> x <em>deltoide<\/em>s (TxD-3230), <em>P<\/em>. <em>deltoides<\/em> x <em>nigra<\/em> (DxN-3570), <em>P<\/em>. <em>canadensis<\/em> x <em>maximowiczii<\/em> (DNxM- 915508), <em>P<\/em>. <em>nigra<\/em> x <em>maximowiczii<\/em> (NxM-3729) et <em>P<\/em>. <em>maximowiczii<\/em> x <em>balsamifera<\/em> (MxB- 915311).<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-215\" src=\"http:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/insertion_milieu_agricole.png\" alt=\"insertion_milieu_agricole\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/insertion_milieu_agricole.png 200w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/insertion_milieu_agricole-150x150.png 150w, https:\/\/www.frfce.qc.ca\/wp-content\/uploads\/2014\/08\/insertion_milieu_agricole-50x50.png 50w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><br \/>\n<strong>Faits saillants<\/strong><\/p>\n<p>Apr\u00e8s 8 saisons de croissance, les principaux r\u00e9sultats de recherche sont les suivants :<\/p>\n<ul>\n<li>Un rendement moyen (moyenne de 5 clones) aussi \u00e9lev\u00e9 que<br \/>\n22 m<sup>3<\/sup>\/ha\/an a \u00e9t\u00e9 obtenu au site fertile et le plus chaud de Bedford (80 m d\u2019altitude).<\/li>\n<li>Un rendement moyen avoisinant 1 m<sup>3<\/sup>\/ha\/an a \u00e9t\u00e9 obtenu au site pauvre et le plus froid de Stornoway (450 m d\u2019altitude).<\/li>\n<li>Le phosphore (P) disponible dans le sol est tr\u00e8s fortement et positivement corr\u00e9l\u00e9 au rendement du peuplier hybride.<\/li>\n<li>L\u2019altitude (un bon estimateur de la dur\u00e9e de la saison de croissance) est tr\u00e8s fortement et n\u00e9gativement corr\u00e9l\u00e9e au rendement du peuplier hybride.<\/li>\n<li>Sur les sites plus frais (haute altitude), mais fertiles, il est important d\u2019opter pour des clones apparent\u00e9s \u00e0 la section des peupliers baumiers ((<em>Populus balsamifera <\/em>(code B) et <em>Populus maximowiczii<\/em> (code M)) en raison de leur plus grande rusticit\u00e9 (ex : MxB-915311, DNxM-915508).<\/li>\n<li>Les dommages caus\u00e9s par le cerf sont moins importants sur les sites riches, car les arbres poussent tr\u00e8s rapidement et sont plus vigoureux.<\/li>\n<li>Les clones apparent\u00e9s \u00e0 la section des peupliers baumiers sont les moins brout\u00e9s par le cerf.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>En conclusion, ces r\u00e9sultats t\u00e9moignent de la grande sensibilit\u00e9 du peuplier hybride \u00e0 la qualit\u00e9 du site de plantation.\u00a0Les basses terres fertiles s\u2019av\u00e8rent des sites id\u00e9aux pour la populiculture. N\u00e9anmoins, il est possible d\u2019obtenir de bons rendements (10-20 m<sup>3<\/sup>\/ha\/an) sur des sites plus frais, mais fertiles, lorsque les bons clones sont s\u00e9lectionn\u00e9s. Enfin, il faut souligner que les terrains peu fertiles ne doivent pas \u00eatre bois\u00e9s avec du peuplier hybride, car les rendements y seront tr\u00e8s d\u00e9cevants. D\u2019autres esp\u00e8ces plus tol\u00e9rantes aux sols pauvres comme le pin rouge auront de meilleurs rendements que le peuplier hybride sur ces sites.<\/p>\n<p>&nbsp;<\/p>\n<style id=\"bwg-style-0\">    #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails {      width: 604px;              justify-content: center;        margin:0 auto !important;              background-color: rgba(255, 255, 255, 0.00);            padding-left: 4px;      padding-top: 4px;      max-width: 100%;            }        #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item {    justify-content: flex-start;      max-width: 120px;            width: 120px !important;          }    #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item a {       margin-right: 4px;       margin-bottom: 4px;    }    #bwg_container1_0 #bwg_container2_0 .bwg-container-0.bwg-standard-thumbnails .bwg-item0 {      padding: 0px;            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           spider_page_0(this, 1, 2, 'numeric');              return false;            });        \t\t\t\t\/* Change page on input enter. *\/        function bwg_change_page_0( e, that ) {          if (  e.key == 'Enter' ) {            var to_page = parseInt(jQuery(that).val());            var pages_count = jQuery(that).parents(\".pagination-links\").data(\"pages-count\");            var current_url_param = jQuery(that).attr('data-url-info');            if (to_page > pages_count) {              to_page = 1;            }\t \t\t\t\t\t\t\t\t\t\t\t\tspider_page_0(this, to_page, 0, 'numeric');\t\t\t\t\t\t\treturn false;\t\t\t\t\t\t          }          return true;        }        jQuery('.bwg_load_btn_0').on('click', function () {            spider_page_0(this, 1, 1, true);            return false;        });      <\/script>      <\/span>                <\/div>        <\/form>              <\/div>    <\/div>    <script>      if (document.readyState === 'complete') {        if( typeof bwg_main_ready == 'function' ) {          if ( jQuery(\"#bwg_container1_0\").height() ) {            bwg_main_ready(jQuery(\"#bwg_container1_0\"));          }        }      } else {        document.addEventListener('DOMContentLoaded', function() {          if( typeof bwg_main_ready == 'function' ) {            if ( jQuery(\"#bwg_container1_0\").height() ) {             bwg_main_ready(jQuery(\"#bwg_container1_0\"));            }          }        });      }    <\/script>    \n<p>&nbsp;<\/p>\n<p><strong>Documentation et projet en cours<\/strong><\/p>\n<p>Un projet de recherche est pr\u00e9sentement en cours dans ce dispositif afin d\u2019\u00e9valuer les rendements apr\u00e8s 13 ans pour ces m\u00eames plantations. Pour le moment, deux articles scientifiques et un article de vulgarisation\u00a0sont disponibles en lien avec le projet.<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Truax, B., D. Gagnon, J. Fortier, et F. Lambert. 2012. Yield in 8 year-old hybrid poplar plantations on abandoned farmland along climatic and soil fertility gradients. Forest Ecology and Management 267:228-239.\u00a0<a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0378112711007432\" target=\"_blank\">www.sciencedirect.com\/science\/article\/pii\/S0378112711007432<\/a><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fortier, J., B. Truax, D. Gagnon, et F. Lambert. 2012. Hybrid poplar yields in Qu\u00e9bec: Implications for a sustainable forest zoning management system. The Forestry Chronicle 88:391-407.\u00a0<a href=\"http:\/\/pubs.cif-ifc.org\/doi\/abs\/10.5558\/tfc2012-075\" target=\"_blank\">http:\/\/pubs.cif-ifc.org\/doi\/abs\/10.5558\/tfc2012-075<\/a><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Truax, B., D. Gagnon, J. Fortier, et F. Lambert. 2012. Choisir une friche propice \u00e0 la culture du peuplier hybride et estimer le rendement d\u2019une plantation. Progr\u00e8s Forestier (\u00c9t\u00e9 2012):8-13. <a href=\"http:\/\/www.afsq.org\/progres_forestier\/archives\/sylviculture\/2012-Ete-plantation.pdf\" target=\"_blank\">www.afsq.org\/progres_forestier\/archives\/sylviculture\/2012-Ete-plantation.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mise en contexte En raison de leur forte productivit\u00e9, les essences \u00e0 croissance rapide, comme le peuplier hybride, sont un outil int\u00e9ressant pour accro\u00eetre les rendements en bois et en biomasse sur des petites superficies. Toutefois, peu de connaissances ont \u00e9t\u00e9 acquises sur le r\u00e9el potentiel du peuplier hybride \u00e0 fournir d\u2019importantes quantit\u00e9s de bois [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":18,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-214","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=214"}],"version-history":[{"count":22,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/214\/revisions"}],"predecessor-version":[{"id":466,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/214\/revisions\/466"}],"up":[{"embeddable":true,"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=\/wp\/v2\/pages\/18"}],"wp:attachment":[{"href":"https:\/\/www.frfce.qc.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}