{"id":4757,"date":"2018-07-20T09:56:54","date_gmt":"2018-07-20T12:56:54","guid":{"rendered":"https:\/\/rehagro.com.br\/blog\/?p=4757"},"modified":"2026-01-30T16:06:32","modified_gmt":"2026-01-30T19:06:32","slug":"como-amostrar-solo-e-raizes-para-analise-nematologica","status":"publish","type":"post","link":"https:\/\/rehagro.com.br\/blog\/como-amostrar-solo-e-raizes-para-analise-nematologica\/","title":{"rendered":"An\u00e1lise nematol\u00f3gica: passo a passo para o diagn\u00f3stico do solo"},"content":{"rendered":"<p>Todo produtor deseja produzir cada vez mais e a agricultura \u00e9 uma das poucas profiss\u00f5es nas quais o principal objeto e local de execu\u00e7\u00e3o do trabalho, n\u00e3o variam: o solo! Ent\u00e3o, <strong>saber fazer uma an\u00e1lise atrav\u00e9s da amostragem do solo e descobrir se h\u00e1 pat\u00f3genos \u00e9 primordial<\/strong>!<\/p>\n<p>Aten\u00e7\u00e3o, pois eles podem estar presentes no solo! Conhecendo bem os fitonematoides, por exemplo, pode reduzir em at\u00e9 12% sua perda na lavoura!<\/p>\n<div style=\"background-color: #efefef; padding-left: 10px; padding-right: 5px; border-radius: 10px;\">\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 14pt;\">Sem tempo para ler agora? Baixe este artigo em PDF!<\/span><\/strong><\/p>\n<p><script charset=\"utf-8\" type=\"text\/javascript\" src=\"\/\/js.hsforms.net\/forms\/embed\/v2.js\"><\/script><br \/>\n<script>\nhbspt.forms.create({\nregion: \"na1\",\nportalId: \"5430441\",\nformId: \"0ced5949-c607-48c5-8d39-f0179ca418eb\"\n});\n<\/script><\/p>\n<\/div>\n<h2>O que s\u00e3o nematoides?<\/h2>\n<p>Genericamente chamados de <strong>fitonematoides<\/strong>, os nematoides parasitos de plantas, s\u00e3o vermes microsc\u00f3picos e transl\u00facidos.<\/p>\n<p>Medem de 0,3 a 3,0 mm e <strong>causam perdas anuais m\u00e9dias \u00e0 produ\u00e7\u00e3o agr\u00edcola mundial, estimadas em 12%<\/strong>, o que corresponde a bilh\u00f5es de d\u00f3lares de preju\u00edzo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11764 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes1.jpg\" alt=\"Amostragem de ra\u00edzes\" width=\"370\" height=\"277\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes1.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes1-300x225.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes1-270x202.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes1-80x60.jpg 80w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/p>\n<p>Praticamente, todas as esp\u00e9cies de plantas cultivadas, seja em plantio convencional ou <strong><a href=\"https:\/\/rehagro.com.br\/blog\/sistema-de-plantio-direto-no-brasil\/\" target=\"_blank\" rel=\"noopener\">plantio direto<\/a><\/strong>, sofrem danos causados por, pelo menos, uma esp\u00e9cie de nematoide. Algumas culturas, inclusive, s\u00e3o hospedeiras de v\u00e1rias esp\u00e9cies.<\/p>\n<h2>Quais os danos causados pelos nematoides?<\/h2>\n<p>A <strong>maioria dos <a href=\"https:\/\/rehagro.com.br\/blog\/nematoides-no-sistema-de-producao-de-graos\/\" target=\"_blank\" rel=\"noopener\">nematoides<\/a> ataca, principalmente, partes subterr\u00e2neas<\/strong>, cujas les\u00f5es ficam vis\u00edveis em forma de caro\u00e7o, recebendo o nome de galhas.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-11765\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes2.jpg\" alt=\"Fitonemat\u00f3ides nas ra\u00edzes\" width=\"370\" height=\"325\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes2.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes2-300x264.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes2-270x237.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes2-342x300.jpg 342w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><span style=\"font-size: 10pt;\">Foto: Dra. Neucimara Rodrigues Ribeiro<\/span><\/p>\n<p style=\"text-align: left;\">As galhas s\u00e3o os sintomas t\u00edpicos da infec\u00e7\u00e3o por esp\u00e9cies de <i>Meloidogyne<\/i>.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11766 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes3.jpg\" alt=\"Galhas Meloidogyne\" width=\"370\" height=\"177\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes3.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes3-300x144.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes3-270x129.jpg 270w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><span style=\"font-size: 10pt;\">Foto: EMBRAPA \u2013 Soja<\/span><\/p>\n<p>Quando adultas, as f\u00eameas possuem o corpo arredondado (forma de mel\u00e3o ou caba\u00e7a) e transl\u00facido. \u00a0Sob condi\u00e7\u00f5es favor\u00e1veis podem produzir at\u00e9 500 ovos, em um per\u00edodo de 4 a 6 semanas.<\/p>\n<p style=\"text-align: left;\">Outras esp\u00e9cies de nematoides causam diferentes tipos de les\u00f5es, a exemplo dos nematoides das les\u00f5es radiculares, <i>Pratylenchus<\/i> spp.<\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 8pt;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11767 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes4.jpg\" alt=\"Nematoides Pratylenchus\" width=\"585\" height=\"193\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes4.jpg 585w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes4-300x99.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes4-370x122.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes4-270x89.jpg 270w\" sizes=\"auto, (max-width: 585px) 100vw, 585px\" \/><span style=\"font-size: 10pt;\">Fotos: Dr. Jaime Maia dos Santos<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Esses nematoides causam a necrose, o descolamento e a quebra do c\u00f3rtex (a casca se solta facilmente) das ra\u00edzes.<\/span><\/p>\n<p>As altera\u00e7\u00f5es radiculares resultam em danos diretos, que depreciam o produto colhido, no caso de <strong><a href=\"https:\/\/rehagro.com.br\/blog\/como-escolher-a-cultivar-de-soja\/\" target=\"_blank\" rel=\"noopener\">cultivares de soja<\/a><\/strong>, por exemplo, ocasionam a perda de vigor e clorose nas folhas.<\/p>\n<p><a href=\"https:\/\/conteudo.rehagro.com.br\/ebook-fertilidade-do-solo-e-nutricao-de-plantas?utm_campaign=material-graos&amp;utm_source=ebook-fertilidade-do-solo&amp;utm_medium=blog\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-39618 size-full\" title=\"Clique e baixe o e-book gr\u00e1tis!\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo.png\" alt=\"E-book Fertilidade do solo e nutri\u00e7\u00e3o de plantas\" width=\"980\" height=\"317\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo.png 980w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-300x97.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-768x248.png 768w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-370x120.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-270x87.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-740x239.png 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-fertilidade-solo-150x49.png 150w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><\/a><\/p>\n<h2>Recomenda\u00e7\u00f5es gerais para coleta de amostras nematol\u00f3gicas<\/h2>\n<p>A amostra deve ser representativa da \u00e1rea, de modo que permita conclus\u00f5es seguras quanto \u00e0 avalia\u00e7\u00e3o quantitativa e qualitativa da popula\u00e7\u00e3o de nematoides presentes. Para isso, v\u00e1rios cuidados devem ser tomados com rela\u00e7\u00e3o ao tamanho e n\u00famero das subamostras, profundidade e padr\u00e3o da amostragem.<\/p>\n<p>As amostras de solo devem ser <strong>coletadas na rizosfera das plantas com sintomas<\/strong>, incluindo-se no mesmo recipiente as ra\u00edzes com inj\u00farias ou galhas que forem encontradas.<\/p>\n<h3>Passo a passo para realizar a amostragem do solo<\/h3>\n<p>As ferramentas necess\u00e1rias para as coletas s\u00e3o: enxad\u00e3o e\/ou enxada, sacos pl\u00e1sticos, balde, etiquetas, caneta e ficha de campo.<\/p>\n<p><strong>1. Coletar amostras de solo e ra\u00edzes;<\/strong><\/p>\n<p><strong>2. As amostras devem estar com umidade natural<\/strong>, evitando-se ao m\u00e1ximo, condi\u00e7\u00f5es de encharcamento ou excessivo ressecamento. N\u00c3O SE DEVE ADICIONAR \u00c1GUA AO VOLUME COLETADO.<\/p>\n<p><strong>3.<\/strong> <strong>As amostras de solo e de ra\u00edzes<\/strong> <strong>devem ser tomadas de 0 a 30 cm de profundidade, abrindo-se o solo em forma de V<\/strong>, tomar amostras junto \u00e0s plantas que mostrem sintomas moderados de nematoses, evitando-se aquelas fortemente depauperadas<\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-11768\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes5.jpg\" alt=\"Amostra de solo\" width=\"696\" height=\"161\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes5.jpg 696w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes5-300x69.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes5-370x86.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes5-270x62.jpg 270w\" sizes=\"auto, (max-width: 696px) 100vw, 696px\" \/><\/span><\/p>\n<p><strong>4.<\/strong> <strong>Coletar preferencialmente as ra\u00edzes mais finas.<\/strong><\/p>\n<p><strong>5.<\/strong> Durante a amostragem, deve-se caminhar em zigue-zague. Em \u00e1reas que apresentam o sintoma em reboleira, <strong>a amostragem deve ser feita nas plantas que se encontram na periferia<\/strong>, como mostra o esquema abaixo:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-11769\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes6.jpg\" alt=\"Amostra em zigue zague\" width=\"370\" height=\"270\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes6.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes6-300x219.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2018\/07\/amostragem-raizes6-270x197.jpg 270w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><span style=\"font-size: 10pt;\">Amostrar em zigue-zague ou na periferia da Reboleira<\/span><\/p>\n<p><strong>6.<\/strong> As subamostras de solo e ra\u00edzes, coletadas nos baldes, devem ser misturadas, tomando-se uma amostra composta de, no m\u00ednimo, 500 gramas de solo e em torno de 50 gramas de ra\u00edzes.<\/p>\n<p><strong>7.<\/strong> <strong>As amostras de solo + ra\u00edzes dever\u00e3o ser acondicionadas em saco pl\u00e1stico e devidamente identificadas<\/strong>. A FICHA DE IDENTIFICA\u00c7\u00c3O deve conter o maior n\u00famero de informa\u00e7\u00f5es poss\u00edveis tais como:<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\">N\u00famero da amostra;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Local da amostragem;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Nome e telefone do propriet\u00e1rio;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Cultura atual (nome cient\u00edfico e\/ou vulgar);<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Culturas anteriores;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Tipo do solo;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Ocorr\u00eancia de plantas daninhas;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Tratos culturais realizados;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Nome do coletor;<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Data da Coleta;<\/li>\n<li>Lavar as m\u00e3os e as ferramentas ap\u00f3s cada coleta para evitar contamina\u00e7\u00e3o das amostras.<\/li>\n<\/ul>\n<p><strong>8.<\/strong> <strong>Lavar as m\u00e3os e as ferramentas, ap\u00f3s cada coleta para evitar contamina\u00e7\u00e3o das amostras<\/strong>;<\/p>\n<p><strong>9.<\/strong> <strong>Manusear as amostras com cuidado, para evitar contamina\u00e7\u00e3o<\/strong>;<\/p>\n<p><strong>10.<\/strong> <strong>Enviar as amostras o quanto antes para o laborat\u00f3rio, N\u00c3O deix\u00e1-las expostas ao sol<\/strong>. Se precisar, as amostras podem ser armazenadas, por algum tempo, na parte inferior da geladeira.<\/p>\n<h2>Qual a quantidade de amostras que deve-se coletar?<\/h2>\n<p>Para as culturas anuais, como soja, <strong><a href=\"https:\/\/rehagro.com.br\/blog\/origem-do-milho-no-brasil\/\" target=\"_blank\" rel=\"noopener\">milho<\/a><\/strong>, <strong><a href=\"https:\/\/rehagro.com.br\/blog\/origem-do-trigo-no-brasil\/\" target=\"_blank\" rel=\"noopener\">trigo<\/a> <\/strong>ou perenes, coletar aproximadamente, dez subamostras por hectare, mistur\u00e1-las em um recipiente e destas fazer uma amostra composta por hectare.<\/p>\n<p>De todo modo, <strong>caso o solo esteja com problemas de nematoide, a troca de sistema de plantio pode ser eficiente.<\/strong> H\u00e1 relatos de redu\u00e7\u00e3o de alguns nematoides quando adotado o sistema de plantio direto, por\u00e9m, quando o assunto \u00e9 redu\u00e7\u00e3o de pat\u00f3genos do solo, a rota\u00e7\u00e3o de cultura ainda \u00e9 a mais recomendada.<\/p>\n<p>E agora que voc\u00ea sabe a import\u00e2ncia de amostrar solos e ra\u00edzes por causa dos nematoides que causam v\u00e1rios danos, voc\u00ea tamb\u00e9m saberia <strong><a href=\"https:\/\/rehagro.com.br\/blog\/identificacao-de-doencas-em-milho\/\" target=\"_blank\" rel=\"noopener\">identificar doen\u00e7as em milho<\/a><\/strong> com sintomas semelhantes? Afinal, se avaliarmos apenas os sintomas visuais, nem sempre d\u00e1 para afirmar, mas o diagn\u00f3stico preciso, \u00e9 muito importante.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-16049 size-medium\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-300x96.jpg\" alt=\"Alessandro Alvarenga\" width=\"300\" height=\"96\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-300x96.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-768x246.jpg 768w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-370x118.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-270x86.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-740x237.jpg 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga-150x48.jpg 150w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/11\/alessandro-alvarenga.jpg 975w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Todo produtor deseja produzir cada vez mais e a agricultura \u00e9 uma das poucas profiss\u00f5es nas quais o principal objeto e local de execu\u00e7\u00e3o do trabalho, n\u00e3o variam: o solo! Ent\u00e3o, saber fazer uma an\u00e1lise atrav\u00e9s da amostragem do solo e descobrir se h\u00e1 pat\u00f3genos \u00e9 primordial! Aten\u00e7\u00e3o, pois eles podem estar presentes no solo! [&hellip;]<\/p>\n","protected":false},"author":21,"featured_media":11770,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[213],"tags":[544,331,567,565,564,252],"class_list":["post-4757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-graos","tag-amostragem-do-solo","tag-doencas","tag-lesoes-radiculares","tag-nematoides","tag-raizes","tag-solo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>An\u00e1lise nematol\u00f3gica: veja o passo a passo de como realizar<\/title>\n<meta name=\"description\" content=\"Veja como realizar uma an\u00e1lise nematol\u00f3gica precisa e identificar nematoides no solo, garantindo decis\u00f5es mais assertivas no manejo e prote\u00e7\u00e3o das ra\u00edzes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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