{"id":15179,"date":"2017-02-14T01:00:35","date_gmt":"2017-02-14T06:00:35","guid":{"rendered":"https:\/\/cna.ca\/fr\/?post_type=news&#038;p=15179"},"modified":"2020-03-10T13:49:45","modified_gmt":"2020-03-10T17:49:45","slug":"boosting-food-nuclear","status":"publish","type":"post","link":"https:\/\/cna.ca\/fr\/2017\/02\/14\/boosting-food-nuclear\/","title":{"rendered":"Accro\u00eetre les disponibilit\u00e9s alimentaires \u00e0 l&#8217;aide du&nbsp;nucl\u00e9aire"},"content":{"rendered":"<p>Les incidences du changement climatique sur les disponibilit\u00e9s alimentaires font l&#8217;objet d&#8217;une pr\u00e9occupation croissante. Comme on l&#8217;a fait remarquer lors de la troisi\u00e8me <a href=\"http:\/\/www.unccd.int\/Lists\/SiteDocumentLibrary\/Publications\/2015_Climate_LD_Outcomes_CST_Conf_ENG.pdf\">conf\u00e9rence scientifique de la Convention des Nations Unies sur la lutte contre la d\u00e9sertification (CNULCD)<\/a> tenue au Mexique l&#8217;an dernier, des pratiques inappropri\u00e9es et un surcro\u00eet de demandes en mati\u00e8re d&#8217;exploitation des terres ont entra\u00een\u00e9 une d\u00e9gradation des sols. Un probl\u00e8me qui a continu\u00e9 de s&#8217;aggraver en raison de la fr\u00e9quence accrue de ph\u00e9nom\u00e8nes m\u00e9t\u00e9orologiques extr\u00eames, ce qui se traduit par le d\u00e9placement ou la destruction d&#8217;\u00e9cosyst\u00e8mes \u00e0 tous \u00e9gards.<\/p>\n<p>La modification du r\u00e9gime des pr\u00e9cipitations et la chaleur croissante ont eu des effets n\u00e9fastes sur le secteur de l&#8217;agriculture, d&#8217;o\u00f9 une offre fonci\u00e8re restreinte en m\u00eame temps qu&#8217;une pression accrue sur les ressources agricoles disponibles.<\/p>\n<p>L&#8217;<a href=\"http:\/\/www.un.org\/apps\/news\/story.asp?NewsID=50564#.WFwmkdIrLcv\">Organisation des Nations Unies pour l&#8217;alimentation et l&#8217;agriculture (ONUAA)<\/a> pr\u00e9voit que les changements climatiques continueront de mettre \u00e0 rude \u00e9preuve le secteur alimentaire, en particulier l&#8217;accessibilit\u00e9 aux ressources hydriques et leur disponibilit\u00e9, indispensables \u00e0 la production alimentaire.<\/p>\n<div id=\"attachment_15154\" style=\"width: 1034px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-15154\" class=\"wp-image-15154 size-large\" src=\"https:\/\/cna.ca\/wp-content\/uploads\/2016\/12\/Copyrightg-stockstudio-1024x683.jpg\" alt=\"copyrightg-stockstudio\" width=\"1024\" height=\"683\" srcset=\"https:\/\/cna.ca\/wp-content\/uploads\/2016\/12\/Copyrightg-stockstudio-1024x683.jpg 1024w, https:\/\/cna.ca\/wp-content\/uploads\/2016\/12\/Copyrightg-stockstudio-300x200.jpg 300w, https:\/\/cna.ca\/wp-content\/uploads\/2016\/12\/Copyrightg-stockstudio-768x513.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><p id=\"caption-attachment-15154\" class=\"wp-caption-text\">Copyright: G Stock Studio<\/p><\/div>\n<p>\u00ab\u00a0En cette \u00e8re de changement acc\u00e9l\u00e9r\u00e9 sans pr\u00e9c\u00e9dent, notre capacit\u00e9 \u00e0 assurer la p\u00e9rennit\u00e9 et l&#8217;\u00e9quitabilit\u00e9 de l&#8217;approvisionnement, en quantit\u00e9 suffisante, en aliments salubres et nutritifs rev\u00eat plus d&#8217;importance que jamais\u00a0\u00bb, pr\u00e9cise Maria Helena M.Q. Semedo, directrice g\u00e9n\u00e9rale adjointe charg\u00e9e des ressources naturelles pour le compte de l&#8217;ONUAA.<\/p>\n<p>Les chercheurs de l&#8217;Institut de recherche en imagerie et ph\u00e9notypage des plantes (<a href=\"https:\/\/www.cs.usask.ca\/research\/phenotyping-centre\/\">P2IRC \u2013 Plant Phenotyping and Imaging Research Center<\/a>), \u00e0 l&#8217;Universit\u00e9 de Saskatchewan, esp\u00e8rent que les sciences nucl\u00e9aires permettront de r\u00e9pondre aux besoins en mati\u00e8re de s\u00e9curit\u00e9 alimentaire, notamment gr\u00e2ce \u00e0 la s\u00e9lection de v\u00e9g\u00e9taux plus r\u00e9sistants aux maladies et aux facteurs de stress climatiques.<\/p>\n<p>\u00ab\u00a0Les parties des produits agricoles que l&#8217;on ne peut voir n&#8217;ont pratiquement plus de secret pour nous. Cependant, les parties des produits agricoles, dont on ne peut voir le syst\u00e8me radiculaire, sont un domaine encore inexplor\u00e9\u00a0\u00bb, indique Paul Arnison, pr\u00e9sident de Botanical Alternatives. \u00ab\u00a0Nous ne nous int\u00e9ressons pas uniquement \u00e0 l&#8217;imagerie des plantes, mais \u00e9galement au d\u00e9veloppement de la capacit\u00e9 de voir ce qui se passe dans le sol. C&#8217;est en ce domaine, autrefois difficile \u00e0 \u00e9tudier, que nous croyons pouvoir faire les progr\u00e8s les plus importants.\u00a0\u00bb<\/p>\n<p>Paul Arnison travaille dans le secteur de la biotechnologie depuis plus de 35\u00a0ans et il croit qu&#8217;un r\u00e9acteur de recherche (RR) et un faisceau de neutrons permettraient de r\u00e9soudre les probl\u00e8mes les plus urgents dans le monde.<\/p>\n<p>Un faisceau de neutrons a la capacit\u00e9 de traverser les plantes et de p\u00e9n\u00e9trer dans le sol qui les environne. Il permet d&#8217;obtenir des renseignements sur la structure v\u00e9g\u00e9tale, sur son rendement en p\u00e9riode de s\u00e9cheresse, sur la circulation de l&#8217;eau, et m\u00eame sur la structure du syst\u00e8me radiculaire. Il s&#8217;agit d&#8217;informations essentielles lorsqu&#8217;on fait face \u00e0 une demande croissante en denr\u00e9es alimentaires et que l&#8217;on s&#8217;int\u00e9resse \u00e0 l&#8217;\u00e9volution des ph\u00e9nom\u00e8nes m\u00e9t\u00e9orologiques.<\/p>\n<p>\u00ab\u00a0Les trois principaux probl\u00e8mes en mati\u00e8re agricole, ce sont les pr\u00e9dateurs, les insectes et les champignons qui d\u00e9vorent ou endommagent les racines des plantes cultiv\u00e9es\u00a0\u00bb, selon Paul Arnison. \u00ab\u00a0\u00c0 titre d&#8217;exemple, la chrysom\u00e8le des racines du ma\u00efs, qui est le principal frein \u00e0 la croissance du ma\u00efs. S&#8217;il \u00e9tait possible d&#8217;observer la croissance des racines en temps r\u00e9el, nous pourrions trouver une meilleure fa\u00e7on de faire face \u00e0 ce pr\u00e9dateur\u00a0\u00bb, dit-il.<\/p>\n<p>Pratiquer une ouverture dans la rhizosph\u00e8re, soit dans la zone environnant les racines, compte parmi les possibilit\u00e9s en mati\u00e8re de recherche sur les plantes. Quantit\u00e9 d&#8217;organismes vivants \u00e9voluent autour des racines et certains microorganismes sont tr\u00e8s b\u00e9n\u00e9fiques, alors que d&#8217;autres posent des probl\u00e8mes consid\u00e9rables. S&#8217;ils pouvaient voir les plantes de part en part, les chercheurs pourraient \u00e9tudier l&#8217;incidence de ces microorganismes sur les cultures environnantes.<\/p>\n<p>Cette approche multidisciplinaire ax\u00e9e sur la solution de probl\u00e8mes constitue un bond en avant et mise sur les partenariats pour trouver des solutions globales \u00e0 l&#8217;ins\u00e9curit\u00e9 alimentaire, notamment gr\u00e2ce aux sciences nucl\u00e9aires.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les incidences du changement climatique sur les disponibilit\u00e9s alimentaires font l&#8217;objet d&#8217;une pr\u00e9occupation croissante. Comme on l&#8217;a fait remarquer lors de la troisi\u00e8me conf\u00e9rence scientifique de la Convention des Nations Unies sur la lutte contre la d\u00e9sertification (CNULCD) tenue au Mexique l&#8217;an dernier, des pratiques inappropri\u00e9es et un surcro\u00eet de demandes en mati\u00e8re d&#8217;exploitation des [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16287,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[244],"tags":[],"topic":[],"class_list":["post-15179","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-contenu-vedette"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Accro\u00eetre les disponibilit\u00e9s alimentaires \u00e0 l&#039;aide du nucl\u00e9aire - Association nucl\u00e9aire canadienne<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cna.ca\/fr\/2017\/02\/14\/boosting-food-nuclear\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Accro\u00eetre les disponibilit\u00e9s alimentaires \u00e0 l&#039;aide du nucl\u00e9aire - Association nucl\u00e9aire canadienne\" \/>\n<meta property=\"og:description\" content=\"Les incidences du changement climatique sur les disponibilit\u00e9s alimentaires font l&#8217;objet d&#8217;une pr\u00e9occupation croissante. 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