{"id":23594,"date":"2025-05-30T11:37:29","date_gmt":"2025-05-30T10:37:29","guid":{"rendered":"https:\/\/sgciafrica.org\/a-inseminacao-artificial-e-uma-vitoria-para-os-agricultores-do-zimbabue\/"},"modified":"2026-02-13T13:38:30","modified_gmt":"2026-02-13T13:38:30","slug":"a-inseminacao-artificial-e-uma-vitoria-para-os-agricultores-do-zimbabue","status":"publish","type":"post","link":"https:\/\/sgciafrica.org\/pt\/a-inseminacao-artificial-e-uma-vitoria-para-os-agricultores-do-zimbabue\/","title":{"rendered":"A insemina\u00e7\u00e3o artificial \u00e9 uma vit\u00f3ria para os agricultores do Zimbabu\u00e9"},"content":{"rendered":"\n<p>[Manzini, SciDev.Net] O agricultor zimbabueano Freedom Sibanda costumava vender as suas cabras por 30 d\u00f3lares americanos cada. Agora, atrav\u00e9s de t\u00e9cnicas de cruzamento, uma cabra pode atingir at\u00e9 60 d\u00f3lares americanos no mercado. <\/p>\n\n<p>Muitos pequenos agricultores em todo o Zimbabu\u00e9 debatem-se com baixa produtividade pecu\u00e1ria e pobreza. Os m\u00e9todos tradicionais de reprodu\u00e7\u00e3o falham frequentemente, deixando as fam\u00edlias com animais de fraca qualidade e rendimentos escassos. <\/p>\n\n<p>Quando Sibanda cruzou cabras inseminadas artificialmente com cabras aut\u00f3ctones do Zimbabu\u00e9, reproduzidas naturalmente, da regi\u00e3o de Matabele, notou melhorias significativas na fertilidade, no tamanho e na resist\u00eancia a doen\u00e7as nas cabras cruzadas.<\/p>\n\n<p>\u00abIsto n\u00e3o \u00e9 apenas bom para mim; beneficia toda a comunidade\u00bb, afirmou.<\/p>\n\n<p>\u00abA qualidade da carne \u00e9 melhor e mais nutritiva, por isso a minha fam\u00edlia alimenta-se de forma mais saud\u00e1vel e podemos vender mais a pre\u00e7os mais elevados.\u00bb<\/p>\n\n<p>Por detr\u00e1s desta melhoria est\u00e1 uma equipa de investigadores da Lupane State University que est\u00e1 a testar tecnologias reprodutivas de baixo custo, incluindo insemina\u00e7\u00e3o artificial e cruzamentos, tanto em aves como em cabras, com resultados iniciais a mostrarem ganhos not\u00e1veis.<\/p>\n\n<p>Avaliaram o impacto da insemina\u00e7\u00e3o artificial em cabras e aves em v\u00e1rias explora\u00e7\u00f5es de pequenos agricultores.<\/p>\n\n<p>Embora a insemina\u00e7\u00e3o artificial, por si s\u00f3, n\u00e3o tenha superado de forma significativa o acasalamento natural nas taxas de fertilidade das cabras \u2014 ambas em torno de 85 por cento \u2014, a descend\u00eancia resultante do cruzamento entre as duas linhas apresentou um desempenho superior, tanto em tamanho como em sucesso reprodutivo.<\/p>\n\n<p>As f\u00eameas cruzadas Matabele-Boer, por exemplo, atingiram at\u00e9 57,5 kg, em compara\u00e7\u00e3o com apenas 42,3 kg nas cabras Matabele de ra\u00e7a pura.<\/p>\n\n<p>Nas aves, por\u00e9m, a insemina\u00e7\u00e3o artificial proporcionou um resultado mais dram\u00e1tico.<\/p>\n\n<p>As taxas de fertilidade subiram de 54 por cento com acasalamento natural para 89 por cento com insemina\u00e7\u00e3o artificial.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-semen-distribution\"><strong>Distribui\u00e7\u00e3o de s\u00e9men<\/strong><\/h2>\n\n<p>A insemina\u00e7\u00e3o artificial \u00e9 uma t\u00e9cnica j\u00e1 amplamente utilizada na agricultura em muitos outros pa\u00edses para melhorar a qualidade gen\u00e9tica e a produtividade no gado bovino e nas aves.<\/p>\n\n<p>No Zimbabu\u00e9, a maioria das explora\u00e7\u00f5es av\u00edcolas pertence a pequenos agricultores, que normalmente mant\u00eam um galo com v\u00e1rias galinhas. Mas os galos podem ser seletivos e acasalar apenas com as suas preferidas. <\/p>\n\n<p>Com a insemina\u00e7\u00e3o artificial, os agricultores recolhem o s\u00e9men do galo e administram-no a cada galinha.<\/p>\n\n<p>\u00abA insemina\u00e7\u00e3o artificial permite uma melhor distribui\u00e7\u00e3o de s\u00e9men, garantindo que cada galinha \u00e9 fecundada adequadamente\u00bb, explica Fortune Jomane, investigador principal do projeto e professor s\u00e9nior na Lupane State University.<\/p>\n\n<p>\u00abEm contrapartida, o acasalamento natural enfrenta frequentemente problemas, como os galos escolherem apenas algumas galinhas, o que reduz a fertilidade.\u00bb<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-extenders\"><strong>Diluentes<\/strong><\/h2>\n\n<p>Jomane e a sua equipa desenvolveram solu\u00e7\u00f5es especiais que mant\u00eam os espermatozoides vivos por mais tempo. Utilizaram tr\u00eas tipos de diluentes: uma chamada \u00absolu\u00e7\u00e3o de Ringer\u00bb contendo cloreto de s\u00f3dio, cloreto de pot\u00e1ssio e lactato de s\u00f3dio; um diluente com glucose; e uma solu\u00e7\u00e3o salina. Compararam-nos com s\u00e9men n\u00e3o dilu\u00eddo para avaliar a sua efic\u00e1cia.  <\/p>\n\n<p>\u00abVerific\u00e1mos que a solu\u00e7\u00e3o de Ringer funcionou muito bem, mantendo o equil\u00edbrio osm\u00f3tico, prevenindo a desidrata\u00e7\u00e3o e preservando a integridade estrutural dos espermatozoides, ao mesmo tempo que mantinha os n\u00edveis de pH\u00bb, disse Jomane.<\/p>\n\n<p>\u00abOs diluentes nutrem os espermatozoides e funcionam como agentes de volume, ajudando a manter a qualidade do s\u00e9men por per\u00edodos prolongados.\u00bb<\/p>\n\n<p>O projeto<strong> <\/strong>de investiga\u00e7\u00e3o, que decorreu de 2023 a 2024, foi financiado com 230.000 d\u00f3lares americanos pela Science Granting Councils Initiative, atrav\u00e9s do <a href=\"https:\/\/www.rcz.ac.zw\/\">Research Council of Zimbabwe (RCZ)<\/a>.<\/p>\n\n<p>Forbes Chinyemba, respons\u00e1vel t\u00e9cnico s\u00e9nior pela gest\u00e3o de investiga\u00e7\u00e3o no RCZ, afirmou que foram formados dez agentes de extens\u00e3o para apoiar os agricultores na utiliza\u00e7\u00e3o de t\u00e9cnicas de insemina\u00e7\u00e3o artificial em galinhas, a fim de melhorar as taxas de fertilidade.<\/p>\n\n<p>\u00abSe capacitar os agentes de extens\u00e3o do governo, est\u00e1 tamb\u00e9m a capacitar o agricultor\u00bb, disse Chinyemba.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-hands-on-experience\"><strong>Experi\u00eancia pr\u00e1tica<\/strong><\/h2>\n\n<p>Sibonangabo Sikhondze, especialista em pecu\u00e1ria de Eswatini, est\u00e1 convencido das vantagens da insemina\u00e7\u00e3o artificial.<\/p>\n\n<p>Sublinha a necessidade de forma\u00e7\u00e3o comunit\u00e1ria, afirmando que os agricultores aprendem melhor atrav\u00e9s da experi\u00eancia pr\u00e1tica.<\/p>\n\n<p>Para tornar a t\u00e9cnica mais acess\u00edvel, Sikhondze recomenda a cria\u00e7\u00e3o de centros locais de presta\u00e7\u00e3o de servi\u00e7os de insemina\u00e7\u00e3o artificial, bem como campanhas de sensibiliza\u00e7\u00e3o para ajudar as comunidades a compreender as vantagens.<\/p>\n\n<p>Jomane afirma que alguns agricultores s\u00e3o c\u00e9ticos quanto \u00e0 efic\u00e1cia da insemina\u00e7\u00e3o artificial, enquanto problemas de transporte e comunica\u00e7\u00e3o limitada tamb\u00e9m podem constituir um obst\u00e1culo para agricultores em zonas remotas.<\/p>\n\n<p>Rios cheios durante a \u00e9poca das chuvas bloqueiam o acesso \u00e0s explora\u00e7\u00f5es e a fraca cobertura de rede m\u00f3vel dificulta o contacto com os agricultores. As falhas de energia afetam a refrigera\u00e7\u00e3o necess\u00e1ria para manter o s\u00e9men vi\u00e1vel. <\/p>\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Manzini, SciDev.Net] O agricultor zimbabueano Freedom Sibanda costumava vender as suas cabras por 30 d\u00f3lares americanos cada. Agora, atrav\u00e9s de t\u00e9cnicas de cruzamento, uma cabra pode atingir at\u00e9 60 d\u00f3lares americanos no mercado. Muitos pequenos agricultores em todo o Zimbabu\u00e9 debatem-se com baixa produtividade pecu\u00e1ria e pobreza. Os m\u00e9todos tradicionais de reprodu\u00e7\u00e3o falham frequentemente, deixando&hellip;<\/p>\n","protected":false},"author":13,"featured_media":23532,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","wds_primary_category":0,"wds_primary_country":0,"wds_primary_objective":0,"wds_primary_sg_theme":0,"footnotes":""},"categories":[159],"tags":[],"country":[],"objective":[],"sg_theme":[],"class_list":["post-23594","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>A insemina\u00e7\u00e3o artificial \u00e9 uma vit\u00f3ria para os agricultores do Zimbabu\u00e9 - SGCI Africa<\/title>\n<meta name=\"description\" content=\"A insemina\u00e7\u00e3o 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Weddi","author_link":"https:\/\/sgciafrica.org\/pt\/author\/davisweddi\/"},"uagb_comment_info":0,"uagb_excerpt":"[Manzini, SciDev.Net] O agricultor zimbabueano Freedom Sibanda costumava vender as suas cabras por 30 d\u00f3lares americanos cada. Agora, atrav\u00e9s de t\u00e9cnicas de cruzamento, uma cabra pode atingir at\u00e9 60 d\u00f3lares americanos no mercado. Muitos pequenos agricultores em todo o Zimbabu\u00e9 debatem-se com baixa produtividade pecu\u00e1ria e pobreza. Os m\u00e9todos tradicionais de reprodu\u00e7\u00e3o falham frequentemente, deixando&hellip;","_links":{"self":[{"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/posts\/23594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/comments?post=23594"}],"version-history":[{"count":0,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/posts\/23594\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/media\/23532"}],"wp:attachment":[{"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/media?parent=23594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/categories?post=23594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/tags?post=23594"},{"taxonomy":"country","embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/country?post=23594"},{"taxonomy":"objective","embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/objective?post=23594"},{"taxonomy":"sg_theme","embeddable":true,"href":"https:\/\/sgciafrica.org\/pt\/wp-json\/wp\/v2\/sg_theme?post=23594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}