{"id":4570,"date":"2025-07-07T14:56:30","date_gmt":"2025-07-07T17:56:30","guid":{"rendered":"https:\/\/portalmaisagro.com\/?p=4570"},"modified":"2025-07-07T14:56:30","modified_gmt":"2025-07-07T17:56:30","slug":"semeadura-direta-e-alternativa-para-restauracao-florestal","status":"publish","type":"post","link":"https:\/\/portalmaisagro.com\/?p=4570","title":{"rendered":"Semeadura direta \u00e9 alternativa para restaura\u00e7\u00e3o florestal"},"content":{"rendered":"

Al\u00e9m de simples, a t\u00e9cnica\u00a0de semeadura direta \u00e9 mais ecol\u00f3gica e mais barata\u00a0do que o plantio de mudas, que ainda hoje \u00e9 a forma mais popular de restaura\u00e7\u00e3o florestal. A pesquisadora Juliana M\u00fcller Freire, da Embrapa Agrobiologia, explica que o m\u00e9todo\u00a0possibilita a restaura\u00e7\u00e3o de \u00e1reas degradadas a partir do plantio de sementes diversas, o que implica na facilidade de transporte da semente e na rapidez em que o plantio pode ser iniciado \u2014 logo ap\u00f3s seu recolhimento. Isso sem falar na diversidade de sementes \u2013 de v\u00e1rios ciclos sucessionais, e n\u00e3o apenas \u00e1rvores (ciclo longo).<\/span><\/p>\n

A semeadura direta\u00a0\u00e9, portanto, uma t\u00e9cnica de plantio em que as sementes s\u00e3o colocadas diretamente no solo. Uma das formas de realiz\u00e1-la \u00e9 pela\u00a0<\/span>muvuca \u2014\u00a0<\/span><\/i>mistura de sementes de esp\u00e9cies de diversos ciclos de vida, como \u00e1rvores e adubos verdes. Sua efic\u00e1cia depende das condi\u00e7\u00f5es do solo e do clima, entre outros fatores. Ela \u00e9 considerada ecol\u00f3gica e sustent\u00e1vel por causa da diversidade de mat\u00e9ria org\u00e2nica que possibilita na regi\u00e3o em que \u00e9 utilizada. Al\u00e9m disso, \u00e9 mais barata e estimula coletas e redes de sementes. Outras vantagens s\u00e3o a manuten\u00e7\u00e3o da qualidade do solo e das esp\u00e9cies e o controle de eros\u00e3o.<\/span><\/p>\n

\"\"
Hidrogel \u00e9 colocado diretamente no solo, antes das sementes – Foto: Yasmin Alves<\/figcaption><\/figure>\n

Segundo Freire, tanto o plantio de mudas quanto a semeadura s\u00e3o ideais para lugares que requerem uma interven\u00e7\u00e3o direta \u2013 ou seja, onde n\u00e3o basta apenas cercar a regi\u00e3o ou impedir a presen\u00e7a de agentes que impossibilitem a natureza de se recuperar por conta pr\u00f3pria, como gado, capim, formiga, etc. \u201cEm compara\u00e7\u00e3o com outras t\u00e9cnicas de restaura\u00e7\u00e3o, essa \u00e9 relativamente nova e ainda est\u00e1 sofrendo ajustes\u201d, conta a pesquisadora. Por isso, \u00e9 preciso promover diversos testes em per\u00edodos e com tecnologias diferentes para que ela prove sua efici\u00eancia e conquiste seu espa\u00e7o na \u00e1rea de reflorestamento. Por ser mais r\u00e1pida e barata, caso se popularize, tem potencial para ampliar o trabalho de restaura\u00e7\u00e3o ambiental.<\/span><\/p>\n

Uso de hidrogel nas sementes<\/b><\/p>\n

Um fator em teste tamb\u00e9m envolve o uso de hidrogel nas sementes \u2013 produto que, <\/span>adicionado \u00e0s mudas, serve como uma reserva de \u00e1gua em per\u00edodos de estiagem. Os experimentos envolvem testes <\/span>antes e depois do veranico \u2013 per\u00edodo de estiagem que ocorre no meio da esta\u00e7\u00e3o chuvosa, geralmente entre janeiro e mar\u00e7o.\u00a0\u201cEssa \u00e9 uma preocupa\u00e7\u00e3o que temos que considerar. No caso das mudas, elas j\u00e1 est\u00e3o grandes, ent\u00e3o t\u00eam mais resist\u00eancia ao estresse h\u00eddrico. J\u00e1 a semente \u00e9 mais sens\u00edvel \u00e0 falta de \u00e1gua\u201d, explicou Freire.\u00a0<\/span><\/p>\n

O hidrogel, tamb\u00e9m conhecido como chuva s\u00f3lida, garante que a planta seja hidratada por um per\u00edodo de um a dois meses, o que diminui a necessidade de irriga\u00e7\u00e3o e mant\u00e9m o baixo custo da t\u00e9cnica.\u00a0Seu uso foi avaliado depois de quatro experimentos bem-sucedidos, testando desde a diferen\u00e7a nas aplica\u00e7\u00f5es antes e depois do veranico at\u00e9 o efeito de bioss\u00f3lido e o uso de protetores para as sementes. \u201cEstamos tentando encontrar a melhor janela de plantio para a semeadura direta e trazer tecnologias para tentar reduzir o dano do veranico no plantio\u201d, informa a pesquisadora.\u00a0<\/span><\/p>\n

\"\"
A muvuca, feita com mais de 20 sementes selecionadas – Foto: Yasmin Alves<\/figcaption><\/figure>\n

Freire acrescenta ainda que j\u00e1 foi comprovado com experimentos anteriores que o per\u00edodo de estiagem afeta diretamente a planta\u00e7\u00e3o. O foco, ent\u00e3o, \u00e9 ver que est\u00e1gio ele afeta mais e se o hidrogel \u00e9 uma solu\u00e7\u00e3o suficiente.<\/span><\/p>\n

Liliane Bello\u00a0<\/b><\/p>\n

Yasmin Alves<\/b>\u00a0<\/span><\/p>\n

Embrapa Agrobiologia<\/span><\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Al\u00e9m de simples, a t\u00e9cnica\u00a0de semeadura direta \u00e9 mais ecol\u00f3gica e mais barata\u00a0do que o plantio de mudas, que ainda hoje \u00e9 a forma mais popular de restaura\u00e7\u00e3o florestal. A pesquisadora Juliana M\u00fcller Freire, da Embrapa Agrobiologia, explica que o m\u00e9todo\u00a0possibilita a restaura\u00e7\u00e3o de \u00e1reas degradadas a partir do plantio…<\/p>\n","protected":false},"author":10,"featured_media":4571,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[146],"tags":[],"class_list":["post-4570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agrobiologia"],"yoast_head":"\nSemeadura direta \u00e9 alternativa para restaura\u00e7\u00e3o florestal - MaisAgro<\/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:\/\/portalmaisagro.com\/?p=4570\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Semeadura direta \u00e9 alternativa para restaura\u00e7\u00e3o florestal - MaisAgro\" \/>\n<meta property=\"og:description\" content=\"Al\u00e9m de simples, a t\u00e9cnica\u00a0de semeadura direta \u00e9 mais ecol\u00f3gica e mais barata\u00a0do que o plantio de mudas, que ainda hoje \u00e9 a forma mais popular de restaura\u00e7\u00e3o florestal. 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