{"id":16596,"date":"2026-06-20T12:52:08","date_gmt":"2026-06-20T12:52:08","guid":{"rendered":"https:\/\/dev.iita.org\/news-item\/africa-rising-success-story\/"},"modified":"2026-06-29T19:06:48","modified_gmt":"2026-06-29T19:06:48","slug":"africa-rising-success-story","status":"publish","type":"news-item","link":"https:\/\/iita.org\/fr\/news-item\/africa-rising-success-story\/","title":{"rendered":"Histoire de r\u00e9ussite d'Africa RISING"},"content":{"rendered":"<strong>Un agriculteur trouve le filon en produisant des lianes et des racines de patate douce \u00e0 chair orange pendant la saison s\u00e8che en Zambie<\/strong>\n\nDans la vall\u00e9e, dans le village de Kasuza, dans la province orientale de Zambie, le long de la fronti\u00e8re avec le Mozambique, Aaron et Mervis Mumba sont des l\u00e9gendes. Le couple, qui a deux enfants, prend litt\u00e9ralement \u00e0 contre-pied la connotation n\u00e9gative associ\u00e9e \u00e0 l'expression \u2018 r\u00e9colter l\u00e0 o\u00f9 l'on n'a pas sem\u00e9 \u2019.\n\nGr\u00e2ce \u00e0 une analyse minutieuse de la saison agricole, \u00e0 une comparaison attentive des co\u00fbts de production du ma\u00efs et de la patate douce \u00e0 chair orange (PDCO), \u00e0 une compr\u00e9hension av\u00e9r\u00e9e des forces du march\u00e9 de l'offre et de la demande \u00e0 l'\u0153uvre dans leur village, et \u00e0 un syst\u00e8me de troc fiable entre les agriculteurs de leur localit\u00e9, cette famille a d\u00e9croch\u00e9 le pactole en se tournant vers la culture de la PDCO en saison s\u00e8che.\n<div id=\"attachment_2806\" class=\"wp-caption aligncenter\" style=\"width: 868px\">\n\n<a href=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Aaron_sweet_spot.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-2806\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Aaron_sweet_spot.jpg\" alt=\"Picture of Aaron and Mavis Mumba with their two children in front of their house. Photo: Simon Mudenda, CIP.\" width=\"868\" height=\"456\" aria-describedby=\"caption-attachment-2806\" \/><\/a>\n<p id=\"caption-attachment-2806\" class=\"wp-caption-text\">Aaron et Mavis Mumba avec leurs deux enfants devant leur maison. Photo : Simon Mudenda, CIP.<\/p>\n\n<\/div>\n<h2>R\u00e9v\u00e9lation du premier coup<\/h2>\n<div>\n<div id=\"attachment_2823\" class=\"wp-caption alignright\" style=\"width: 271px\">\n\n<a href=\"http:\/\/bulletin.iita.org\/wp-content\/uploads\/2017\/09\/492_OFSP-roots.jpg\"><img decoding=\"async\" class=\"wp-image-2823\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/492_OFSP-roots-300x225.jpg\" alt=\"Picture of a government extension agent holds up big OFSP roots harvested from the Mumbas\u2019 farm \" width=\"271\" height=\"203\" aria-describedby=\"caption-attachment-2823\" \/><\/a>\n<p id=\"caption-attachment-2823\" class=\"wp-caption-text\">Un agent de vulgarisation gouvernemental pr\u00e9sente de grosses racines de patate douce \u00e0 chair orange (OFSP) r\u00e9colt\u00e9es dans la ferme des Mumba lors d'une visite de terrain organis\u00e9e par l'\u00e9quipe du projet Africa RISING. Cr\u00e9dit photo : Simon Mudenda\/CIP.<\/p>\n\n<\/div>\n<\/div>\nLes Mumba avaient toujours \u00e9t\u00e9 des agriculteurs de subsistance, cultivant diverses cultures telles que le ma\u00efs, le soja, le manioc et la patate douce (non biofortifi\u00e9e). Les choses ont chang\u00e9 en septembre 2014, apr\u00e8s qu'Aaron s'est joint \u00e0 plusieurs autres agriculteurs lors d'une r\u00e9union de partenaires organis\u00e9e par le Centre international de la pomme de terre (CIP) et l'Institut de recherche agricole de Zambie (ZARI). Cela marquerait un tournant dans sa pratique agricole, passant de la subsistance \u00e0 une entreprise commerciale. Lors de la r\u00e9union, le CIP recrutait des multiplicateur\u00b7rice\u00b7s de liti\u00e8res de patates douces \u00e0 chair orange (PDCO) et Aaron s'est port\u00e9 volontaire. Le reste appartient \u00e0 l'histoire et Aaron et Mervis n'ont jamais regard\u00e9 en arri\u00e8re. Ils cultivent toujours d'autres cultures pour leurs besoins de subsistance, mais la production de PDCO (pour les racines et les lianes) est d\u00e9sormais leur principale activit\u00e9 agricole commerciale, gr\u00e2ce \u00e0 la demande de la communaut\u00e9 pour le go\u00fbt d\u00e9licieux et la valeur nutritive de la PDCO.\n\nSur les 1,5 ha de terres de la famille, ils cultivent la vari\u00e9t\u00e9 de PDCO Olympia sur seulement 0,25 ha. Cette petite surface cultiv\u00e9e en PDCO offre cependant les meilleurs rendements ! \u00c0 la fin de la saison 2014\/2015, les Mumba ont troqu\u00e9 200 sacs de lianes et de racines de PDCO contre 10 000 kg de ma\u00efs. Les conditions d'\u00e9change en vigueur au cours de cette saison \u00e9taient d'un sac de lianes ou de racines de PDCO pour un sac de ma\u00efs de 50 kg.\n\n\u2019 Cette saison 2014\/2015 a \u00e9t\u00e9 une r\u00e9v\u00e9lation pour nous \u201c, d\u00e9clare Aaron. \u201d Nous n'aurions pas pu cultiver et r\u00e9colter une quantit\u00e9 de ma\u00efs proche de celle que j'ai obtenue gr\u00e2ce \u00e0 cet \u00e9change avec diff\u00e9rents agriculteurs de mon village. Comme les lianes et les racines \u00e9taient tr\u00e8s demand\u00e9es et que j'\u00e9tais le seul fournisseur, nous avons obtenu de tr\u00e8s bons rendements ! \u201c\n<div id=\"attachment_2807\" class=\"wp-caption aligncenter\" style=\"width: 872px\">\n\n<a href=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Orange_fleshed_sweet_potato.png\"><img decoding=\"async\" class=\"wp-image-2807\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Orange_fleshed_sweet_potato.png\" alt=\"Picture of a graphic illustration of how the Mumbas make it work. Credit: Jonathan Odhong\u2019, IITA\" width=\"872\" height=\"390\" aria-describedby=\"caption-attachment-2807\" \/><\/a>\n<p id=\"caption-attachment-2807\" class=\"wp-caption-text\">Une illustration graphique montrant comment les Mumba y arrivent. Cr\u00e9dit : Jonathan Odhong\u2019, IITA<\/p>\n\n<\/div>\n<h2>Apprendre vite, faire des choix judicieux<\/h2>\nApprenant tr\u00e8s vite et b\u00e9n\u00e9ficiant des conseils offerts par l'Agence des \u00c9tats-Unis pour le d\u00e9veloppement international (USAID)\u00a0<a href=\"https:\/\/africa-rising.net\/\" target=\"_blank\" rel=\"noopener\">AFRIQUE GRANDISSANT<\/a>\u00a0Dans le cadre du projet Going to Scale dans la Province orientale de Zambie, Aaron et Mervis ont eu une id\u00e9e. S'ils parvenaient \u00e0 exploiter l'eau souterraine facilement accessible sur leur ferme, gr\u00e2ce \u00e0 une nappe phr\u00e9atique \u00e9lev\u00e9e, ils pourraient d\u00e9marrer la production de lani\u00e8res de vigne en saison s\u00e8che. Cette initiative, esp\u00e9raient-ils, leur garantirait d'avoir des lani\u00e8res (tr\u00e8s demand\u00e9es) pr\u00eates \u00e0 \u00eatre troqu\u00e9es avec d'autres agriculteurs au d\u00e9but de la saison des pluies, moment o\u00f9 la majorit\u00e9 d'entre eux chercheraient \u00e0 nouveau des lani\u00e8res de patate douce \u00e0 chair orange (OFSP) \u00e0 planter. Au co\u00fbt de 400 bottes de lani\u00e8res d'OFSP, Aaron a achet\u00e9 une pompe \u00e0 p\u00e9dale \u00e0 l'\u00e9quipe du projet et a commenc\u00e9 la production de lani\u00e8res et de racines d'OFSP gr\u00e2ce \u00e0 l'humidit\u00e9 r\u00e9siduelle et \u00e0 l'irrigation.\n\nLorsque la saison des pluies 2015\/2016 est arriv\u00e9e, les Mumba \u00e9taient pr\u00eats avec leurs lani\u00e8res adultes pour troquer avec leurs coll\u00e8gues agriculteurs. Cependant, cette fois-ci, il ne s'agissait pas d'un \u00e9change direct de biens, car la saison des plantations venait de commencer et aucun agriculteur n'avait de ma\u00efs \u00e0 offrir en \u00e9change imm\u00e9diat. Apr\u00e8s s'\u00eatre mis d'accord sur les conditions avec chaque agriculteur int\u00e9ress\u00e9 du village, Aaron et Mervis ont fourni les lani\u00e8res pr\u00eates \u00e0 \u00eatre plant\u00e9es. Pendant la saison des r\u00e9coltes 2015\/2016, chaque agriculteur est revenu et a r\u00e9gl\u00e9 ses comptes avec eux.\n<h2>Meilleurs rendements par hectare de chair orange (ou: de patate douce \u00e0 chair orange \/ de BPCO)<\/h2>\nIls ont r\u00e9alis\u00e9 qu'ils ont tout int\u00e9r\u00eat \u00e0 cultiver une petite partie de patate douce \u00e0 chair orange (0,25 ha) qui leur rapporte autant que 10 000 kg de ma\u00efs en troc (comme cela s'est produit lors de la saison 2015\/2016). Selon l'Agence zambienne de r\u00e9serve alimentaire, au cours de cette m\u00eame saison (2015\/2016), les prix variaient entre 85 et 100 ZMW (0,30 USD) le sac de 50 kg de ma\u00efs.\n<div id=\"attachment_2824\" class=\"wp-caption aligncenter\" style=\"width: 866px\">\n\n<a href=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Profitability-analysis-for-maize-production-by-the-Mumbas.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2824\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Profitability-analysis-for-maize-production-by-the-Mumbas.png\" alt=\"Table 1. Profitability analysis for maize production by the Mumbas\" width=\"866\" height=\"486\" aria-describedby=\"caption-attachment-2824\" \/><\/a>\n<p id=\"caption-attachment-2824\" class=\"wp-caption-text\"><strong>Tableau 1.<\/strong>\u00a0Analyse de la rentabilit\u00e9 de la production de ma\u00efs par la famille Mumba<\/p>\n\n<\/div>\n<div id=\"attachment_2825\" class=\"wp-caption aligncenter\" style=\"width: 874px\">\n\n<a href=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Profitability-analysis-for-sweet-potato-production-by-the-Mumbas.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2825\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Profitability-analysis-for-sweet-potato-production-by-the-Mumbas.png\" alt=\"Table 2. Profitability analysis for sweet potato production by the Mumbas\" width=\"874\" height=\"652\" aria-describedby=\"caption-attachment-2825\" \/><\/a>\n<p id=\"caption-attachment-2825\" class=\"wp-caption-text\"><strong>Tableau 2.<\/strong>\u00a0Analyse de rentabilit\u00e9 de la production de patates douces par les Mumbas<\/p>\n\n<\/div>\n<em>En comparant les entreprises de ma\u00efs et de patate douce \u00e0 chair orange (OFSP), une analyse de rentabilit\u00e9 a r\u00e9v\u00e9l\u00e9 une marge brute plus \u00e9lev\u00e9e pour la patate douce (33 633,80 ZMW) que pour le ma\u00efs (\u2013132,85 ZMW) par hectare. Cela indique un ratio avantages-co\u00fbts de 2,34 pour l'OFSP et de \u20130,09 pour le ma\u00efs. Par cons\u00e9quent, pour chaque ZMW 1 investi\u00a0<\/em>Mumbas<em>\u00a0d\u00e9penser pour la culture de la patate douce \u00e0 chair orange (OFSP) leur procure un avantage suppl\u00e9mentaire de 2,34 ZMW, contrairement \u00e0 leur perte comparative de \u20130,09 ZMW r\u00e9alis\u00e9e en cultivant du ma\u00efs.<\/em>\n<h2>Perspectives d'avenir face \u00e0 l'\u00e9volution des conditions m\u00e9t\u00e9orologiques<\/h2>\n<a href=\"http:\/\/bulletin.iita.org\/wp-content\/uploads\/2017\/09\/Dry-season-OFSP.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-2826\" src=\"https:\/\/iita.org\/wp-content\/uploads\/2026\/06\/Dry-season-OFSP-300x276.png\" alt=\"Picture of Dry season OFSP production\" width=\"300\" height=\"276\" \/><\/a>Cependant, les effets de l'\u00e9volution des conditions climatiques n'ont pas \u00e9pargn\u00e9 les Mumba. De faibles pr\u00e9cipitations au cours des saisons 2015\/2016 ont eu un impact n\u00e9gatif sur leur production de racines et de sarments en saison s\u00e8che, leurs puits peu profonds s'\u00e9tant ass\u00e9ch\u00e9s. En raison de la faible productivit\u00e9, ils ont gagn\u00e9 2 550 ZMW en troquant seulement trente sacs de 50 kg en 2016 gr\u00e2ce \u00e0 la production de saison s\u00e8che de la saison pr\u00e9c\u00e9dente. N\u00e9anmoins, ce revenu \u00e9tait suffisant pour permettre \u00e0 la famille d'acheter d'autres denr\u00e9es alimentaires qu'elle n'avait pas cultiv\u00e9es cette ann\u00e9e-l\u00e0. Pour 2017, gr\u00e2ce aux sarments de patate douce \u00e0 Chair Orange (OFSP) produits pendant la saison s\u00e8che 2016, ils ont troqu\u00e9 130 sacs de 50 kg de ma\u00efs.\n\n\u201c Je suis reconnaissante que nous nous soyons lanc\u00e9s dans cette entreprise de production de sarments et de racines d'OFSP \u201d, d\u00e9clare Mervis. \u201c Cela change notre vie pour le mieux. Nous avons pu construire une maison et pr\u00e9voyons maintenant d'\u00e9conomiser pour acheter une voiture qui nous permettra d'\u00e9tendre notre approvisionnement en sarments jusqu'aux villages voisins. Nous continuons d'apprendre de nouvelles choses au fur et \u00e0 mesure. \u201d\n\nL'histoire \u00e0 succ\u00e8s des Mumba met en \u00e9vidence la mani\u00e8re dont des technologies agricoles am\u00e9lior\u00e9es confi\u00e9es \u00e0 des agriculteurs \u2019 pionniers \u201c innovants peuvent entra\u00eener une am\u00e9lioration significative des moyens de subsistance, garantir une vulgarisation \u00e0 grande \u00e9chelle de ces technologies et assurer des cha\u00eenes de valeur adapt\u00e9es aux agriculteurs qui r\u00e9pondent aux besoins de d\u00e9veloppement des communaut\u00e9s locales.\n\nLe projet \u201d Africa RISING going to scale in Eastern Province of Zambia \u2019 (D\u00e9ploiement \u00e0 grande \u00e9chelle d'Africa RISING dans la province orientale de Zambie) s'efforce de diffuser l'OFSP et d'autres technologies agricoles am\u00e9lior\u00e9es par le biais de diverses approches et canaux. Dans la strat\u00e9gie de vulgarisation de l'OFSP, les agriculteurs pionniers tels que Mervis et Aaron sont appel\u00e9s multiplicateurs de sarments d\u00e9centralis\u00e9s (DVM) qui fournissent des sarments d'OFSP \u00e0 leurs communaut\u00e9s \u201c locales \u201d. Actuellement, le projet collabore avec 214 DVM par le biais d'un r\u00e9seau complexe et strat\u00e9gique qui garantit que le mat\u00e9riel de plantation de patates douces passe des stations de recherche aux agriculteurs.","protected":false},"excerpt":{"rendered":"<p>Farmer finds a sweet spot producing orange-fleshed sweet potato vines and roots during the dry season in Zambia<\/p>","protected":false},"featured_media":16597,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"tags":[],"science-area":[],"program":[],"location":[46],"news-type":[],"hub":[63],"crop":[],"impact-areas":[],"item-year":[195],"class_list":["post-16596","news-item","type-news-item","status-publish","has-post-thumbnail","hentry","location-zambia","hub-central-africa","item-year-195"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - 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