{"id":6031,"date":"2019-10-15T10:56:38","date_gmt":"2019-10-15T13:56:38","guid":{"rendered":"https:\/\/rehagro.com.br\/blog\/?p=6031"},"modified":"2026-04-07T19:43:19","modified_gmt":"2026-04-07T22:43:19","slug":"adubo-npk","status":"publish","type":"post","link":"https:\/\/rehagro.com.br\/blog\/adubo-npk\/","title":{"rendered":"Adubo NPK: como fazer o c\u00e1lculo de aduba\u00e7\u00e3o para cafeeiros?"},"content":{"rendered":"<p>Os <strong>adubos<\/strong> <strong>NPK<\/strong> s\u00e3o compostos por tr\u00eas nutrientes chamados macronutrientes prim\u00e1rios: <strong>Nitrog\u00eanio (N), F\u00f3sforo (P) e Pot\u00e1ssio (K).<\/strong><\/p>\n<p>A aduba\u00e7\u00e3o \u00e9 um aspecto muito importante que influencia na produtividade da cultura. Nesse sentido, um fornecimento adequado dos nutrientes tem interfer\u00eancia direta em seu crescimento.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22615 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-1.jpg\" alt=\"Florada de cafeeiro adulto\" width=\"270\" height=\"360\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-1.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-1-225x300.jpg 225w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-1-150x200.jpg 150w\" sizes=\"auto, (max-width: 270px) 100vw, 270px\" \/><span class=\"c1\" style=\"font-size: 10pt;\">Florada de cafeeiro adulto (Foto: Diego Baqui\u00e3o).<\/span><\/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 src=\"\/\/js.hsforms.net\/forms\/v2.js\" type=\"text\/javascript\" charset=\"utf-8\"><\/script><br \/>\n<script>\n  hbspt.forms.create({\n    region: \"na1\",\n    portalId: \"5430441\",\n    formId: \"7dcaf60d-0e23-40ed-8b40-9b8cb07b4128\"\n  });\n<\/script><\/p>\n<\/div>\n<h2>Nitrog\u00eanio (N)<\/h2>\n<p>Para calcular a demanda de <strong><a href=\"https:\/\/rehagro.com.br\/blog\/nitrogenio-na-cultura-do-cafe\/\" target=\"_blank\" rel=\"noopener\">nitrog\u00eanio para lavouras de caf\u00e9<\/a><\/strong> em produ\u00e7\u00e3o, \u00e9 utilizada a f\u00f3rmula da ProCaf\u00e9, que considera a produtividade esperada para as safras seguintes:<\/p>\n<ul>\n<li style=\"text-align: left;\"><strong>N (kg\/ha) = (produ\u00e7\u00e3o (em sacas por ha) x 2,6) + (pr\u00f3xima safra (em sacas por ha) x 3,6)<\/strong><\/li>\n<\/ul>\n<p>Nessa f\u00f3rmula, a demanda de N \u00e9 calculada com base na produ\u00e7\u00e3o esperada em sacas por hectare naquele ano agr\u00edcola, multiplicada por 2,6. Esse valor \u00e9 somado \u00e0 produ\u00e7\u00e3o esperada na safra seguinte, em sacas por hectare, multiplicada por 3,6.<\/p>\n<p>A partir desse c\u00e1lculo, temos como resultado a quantidade de nitrog\u00eanio que dever\u00e1 ser aplicada naquela safra em quilos por hectare.<\/p>\n<p>Exemplo: Se naquele ano agr\u00edcola a produ\u00e7\u00e3o esperada \u00e9 de 40 sacas\/ha e na safra seguinte \u00e9 de 25 sacas\/ha, temos:<\/p>\n<ul>\n<li style=\"text-align: left;\">N (kg\/ha) = (40 sacas x 2,6) + (25 sacas x 3,6) = 104 + 90 = 194 kg de N por hectare<\/li>\n<\/ul>\n<p>Ent\u00e3o, a demanda para essa lavoura \u00e9 de 194 kg de Nitrog\u00eanio por hectare, que deve ser parcelada em pelo menos tr\u00eas aduba\u00e7\u00f5es.<\/p>\n<p><a href=\"https:\/\/conteudo.rehagro.com.br\/ebook-calagem-na-cultura-do-cafe?utm_campaign=material-cafe&amp;utm_source=ebook-calagem&amp;utm_medium=blog\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-39672 size-full\" title=\"Clique e baixe o e-book gr\u00e1tis!\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe.png\" alt=\"E-book Calagem no caf\u00e9\" width=\"980\" height=\"317\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe.png 980w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-300x97.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-768x248.png 768w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-370x120.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-270x87.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-740x239.png 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2025\/09\/banner-ebook-calagem-cafe-150x49.png 150w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><\/a><\/p>\n<h3>Fontes de Nitrog\u00eanio<\/h3>\n<p>Ap\u00f3s calculada a necessidade de nitrog\u00eanio por hectare e determinada a fonte a ser utilizada, faz-se o c\u00e1lculo da quantidade de adubo nitrogenado considerando porcentagem de N em cada fonte.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41756 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes.png\" alt=\"Fontes de fertilizantes nitrogenados\" width=\"620\" height=\"275\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes.png 620w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes-300x133.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes-370x164.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes-270x120.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fertilizantes-150x67.png 150w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><span class=\"c1\" style=\"font-size: 10pt;\"> Fontes de fertilizantes nitrogenados que podem ser utilizadas. Fonte: Raij et al. (1997)<\/span><\/p>\n<p>Ap\u00f3s calculada a dose de nitrog\u00eanio necess\u00e1ria e escolhido o fertilizante a ser utilizado, faz-se o c\u00e1lculo considerando a efici\u00eancia (aproveitamento) da fonte. Para a utiliza\u00e7\u00e3o da fonte ureia se considera uma efici\u00eancia de 70%, j\u00e1 para a fonte de nitrato de am\u00f4nio se considera 90%.<\/p>\n<h3>Sintomas de defici\u00eancia de nitrog\u00eanio<\/h3>\n<p>Os <strong><a href=\"https:\/\/rehagro.com.br\/blog\/sintomas-de-deficiencias-nutricionais-em-cafeeiro\/\" target=\"_blank\" rel=\"noopener\">sintomas de defici\u00eancia<\/a><\/strong> de nitrog\u00eanio aparecem em folhas velhas, com clorose (amarelecimento) generalizada.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22617 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-3.jpg\" alt=\"Folhas com sintomas de defici\u00eancia de Nitrog\u00eanio\" width=\"370\" height=\"494\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-3.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-3-225x300.jpg 225w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-3-270x360.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-3-150x200.jpg 150w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><span style=\"font-size: 10pt;\">Folhas com sintomas de defici\u00eancia de Nitrog\u00eanio<\/span><\/p>\n<h2>F\u00f3sforo (P)<\/h2>\n<p>Para <strong>recomenda\u00e7\u00e3o de aduba\u00e7\u00e3o com <a href=\"https:\/\/rehagro.com.br\/blog\/fosfatagem-no-cafeeiro\/\" target=\"_blank\" rel=\"noopener\">f\u00f3sforo<\/a> em lavouras de caf\u00e9<\/strong>, quando utilizado o extrator Mehlich 1, os t\u00e9cnicos trabalham com um intervalo entre o m\u00ednimo de f\u00f3sforo no solo sendo 15 mg\/dm&gt;3\u00a0e um ideal de 25 mg\/dm3. Para o extrator Resina \u00e9 comum trabalhar com teores acima de 30 ou 40 mg\/dm\u00b3 no solo.<\/p>\n<p>A <strong><a href=\"https:\/\/rehagro.com.br\/blog\/mehlich-1-e-resina\/\" target=\"_blank\" rel=\"noopener\">diferen\u00e7a entre os extratores Mehlich 1 e Resina<\/a><\/strong> \u00e9 que o m\u00e9todo de Mehlich 1 (\u00e1cido clor\u00eddrico + \u00e1cido sulf\u00farico) utiliza um extrator fortemente \u00e1cido. Dessa forma, esse m\u00e9todo pode extrair o f\u00f3sforo ligado ao c\u00e1lcio, que n\u00e3o est\u00e1 dispon\u00edvel para as plantas.<\/p>\n<p>Por isso, solos adubados com fosfatos de baixa solubilidade (como fosfatos naturais) e com a utiliza\u00e7\u00e3o desses extratores \u00e1cidos, \u00e9 poss\u00edvel retirar quantidades de f\u00f3sforo superiores \u00e0quelas consideradas dispon\u00edveis.<\/p>\n<p>Al\u00e9m disso, em solos argilosos esse mesmo extrator pode subestimar os valores de P dispon\u00edveis, apresentando valores menores devido ao fato de os extratores serem mais desgastados nesses solos, quando comparados aos arenosos.<\/p>\n<p>J\u00e1 o extrator Resina se fundamenta na premissa de simular o comportamento do sistema radicular das plantas na absor\u00e7\u00e3o de f\u00f3sforo do solo. Esse processo gera a adsor\u00e7\u00e3o de P na solu\u00e7\u00e3o nas cargas positivas da resina e, como consequ\u00eancia, h\u00e1 a remo\u00e7\u00e3o do P adsorvido na superf\u00edcie das part\u00edculas do solo.<\/p>\n<p>Dessa forma, a resina n\u00e3o superestima a disponibilidade de P em solos tratados com fosfatos naturais, como ocorre com os extratores \u00e1cidos.<\/p>\n<p>Para<strong> elevar o n\u00edvel de f\u00f3sforo no solo<\/strong>, calcula-se com base na tabela 2. Variando a quantidade de P2O5 com base no teor de argila e no extrator utilizado.<\/p>\n<p>Por exemplo, um solo com teor de argila menor que 15%, \u00e9 necess\u00e1rio 5 kg de P2O5\u00a0para elevar 1 mg\/dm3 de f\u00f3sforo, se utilizado o extrator Mehlich 1. J\u00e1 se for utilizado o extrator Resina para o mesmo solo, \u00e9 necess\u00e1rio a utiliza\u00e7\u00e3o de 6 kg de P2O5 para elevar 1 mg\/dm3\u00a0de f\u00f3sforo.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41757 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct.png\" alt=\"Tabela de teor de argila no solo\" width=\"560\" height=\"309\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct.png 560w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct-300x166.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct-370x204.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct-270x149.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-valores-ct-150x83.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><span class=\"c2\" style=\"font-size: 10pt;\">Valores do fator CT (capacidade tamp\u00e3o de f\u00f3sforo) para estimar a dose do adubo fosfatado, em fun\u00e7\u00e3o do teor de argila no solo, para os m\u00e9todos de Mehlich 1 e resina.<\/span><\/p>\n<h3>Fontes de f\u00f3sforo<\/h3>\n<p>Ap\u00f3s calculada a necessidade de P2O5\u00a0por hectare e determinada a fonte de f\u00f3sforo, faz-se o c\u00e1lculo da quantidade de adubo fosfatado considerando porcentagem de P2O5\u00a0em cada fonte:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41758 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo.png\" alt=\"Tabela com fontes de f\u00f3sforo\" width=\"470\" height=\"234\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo.png 470w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo-300x149.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo-370x184.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo-270x134.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-fosforo-150x75.png 150w\" sizes=\"auto, (max-width: 470px) 100vw, 470px\" \/><span style=\"font-size: 10pt;\">Fontes de fertilizantes fosfatados que podem ser utilizadas.<\/span><\/p>\n<p>Os sintomas de defici\u00eancia de f\u00f3sforo aparecem inicialmente em folhas velhas, caracterizadas por folhas verdes e sem brilho. Elas podem amarelecer e apresentar grandes manchas pardas ou viol\u00e1ceas na ponta e no meio.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22618\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4.jpg\" alt=\"Folhas de cafeeiro com sintomas de defici\u00eancia de F\u00f3sforo\" width=\"600\" height=\"450\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4.jpg 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4-300x225.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4-370x278.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4-270x203.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4-80x60.jpg 80w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-4-150x113.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><span style=\"font-size: 10pt;\">Folhas com sintomas de defici\u00eancia de F\u00f3sforo<\/span><\/p>\n<h2>Pot\u00e1ssio (K)<\/h2>\n<p>A recomenda\u00e7\u00e3o de aduba\u00e7\u00e3o para o <a href=\"https:\/\/rehagro.com.br\/blog\/potassio-na-cultura-do-cafe\/\" target=\"_blank\" rel=\"noopener\"><strong>pot\u00e1ssio<\/strong><\/a> em lavouras adultas normalmente \u00e9 trabalhada na manuten\u00e7\u00e3o com cerca de 120 mg\/dm3\u00a0ou de 0,30 a 0,35 cmolc\/dm3 no solo, adicionada a extra\u00e7\u00e3o de pot\u00e1ssio para produ\u00e7\u00e3o e vegeta\u00e7\u00e3o.<\/p>\n<h3>C\u00e1lculo para manuten\u00e7\u00e3o<\/h3>\n<p>Por exemplo, se o solo possui teor de pot\u00e1ssio de 100 mg\/dm3\u00a0e voc\u00ea deseja que ele tenha 120 mg\/dm3\u00a0de pot\u00e1ssio:<\/p>\n<ul>\n<li style=\"text-align: left;\">120 mg\/dm3 (quero atingir) &#8211; 100 mg\/dm3 (tenho no solo) = 20 mg\/dm3<\/li>\n<\/ul>\n<p>20 mg\/dm3\u00a0\u00e9 o que eu preciso aumentar de pot\u00e1ssio no solo, para que ele atinja 120 mg\/dm3.<\/p>\n<p>Em cmolc\/ dm3\u00a0essa quantidade corresponde a: 0,05 cmolc\/dm3 que preciso aumentar no meu solo (massa molar do pot\u00e1ssio: 390).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22619 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5.jpg\" alt=\"C\u00e1lculo para manuten\u00e7\u00e3o de aduba\u00e7\u00e3o NPK\" width=\"518\" height=\"64\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5.jpg 518w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5-300x37.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5-370x46.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5-270x33.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-5-150x19.jpg 150w\" sizes=\"auto, (max-width: 518px) 100vw, 518px\" \/><\/p>\n<p>Para aumentar 1 cmolc\/dm3 \u00e9 necess\u00e1rio 942 Kg de K2O por hectare:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22620 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6.jpg\" alt=\"C\u00e1lculo para manuten\u00e7\u00e3o de aduba\u00e7\u00e3o NPK\" width=\"522\" height=\"64\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6.jpg 522w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6-300x37.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6-370x45.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6-270x33.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-6-150x18.jpg 150w\" sizes=\"auto, (max-width: 522px) 100vw, 522px\" \/><\/p>\n<p>Ent\u00e3o, para que eu aumente 20 mg\/dm3 ou 0,05 cmolc\/dm&gt;3 de pot\u00e1ssio no meu solo eu preciso adicionar 47,1 Kg de K2O por hectare.<\/p>\n<h3>C\u00e1lculo para a extra\u00e7\u00e3o<\/h3>\n<p>Para a produ\u00e7\u00e3o \u00e9 considerado 3,00 kg de K por saca e para vegeta\u00e7\u00e3o 2,90 kg de K por saca. Considerando o mesmo exemplo do nitrog\u00eanio com produ\u00e7\u00e3o esperada de 40 sacas\/ha naquele ano agr\u00edcola e na safra seguinte de 25 sacas\/ha.<\/p>\n<ul>\n<li style=\"text-align: left;\"><strong>K (kg\/ha) = (produ\u00e7\u00e3o x 3) + (vegeta\u00e7\u00e3o x 2,9)<\/strong><\/li>\n<li style=\"text-align: left;\">K (kg\/ha) = (40sc x 3) + (25 sc x 2,9) = 120 + 72,5 = 192,5 kg de K2O por hectare<\/li>\n<\/ul>\n<p>Dessa forma, \u00e9 demandado para a produ\u00e7\u00e3o e vegeta\u00e7\u00e3o 192,5 kg de K2O por hectare.<\/p>\n<p>Para a aduba\u00e7\u00e3o com pot\u00e1ssio soma-se a quantidade demandada de pot\u00e1ssio para atingir o teor pretendido no solo + teor de pot\u00e1ssio para a produ\u00e7\u00e3o e para a vegeta\u00e7\u00e3o.<\/p>\n<ul>\n<li style=\"text-align: left;\">47,1 Kg de K2O\/ha + 192,5 kg de K2O\/ha = 239,6 kg de K2O\/ha<\/li>\n<\/ul>\n<p>Resultando em uma demanda de 239,6 kg de K2O\/ha. De acordo com essa quantidade demandada de pot\u00e1ssio, escolhe-se a fonte que ser\u00e1 utilizada e faz o c\u00e1lculo da quantidade de fertilizante com base na porcentagem de K2O da fonte.<\/p>\n<p><a href=\"https:\/\/rehagro.com.br\/cursos\/capacitacao-em-gestao-na-producao-de-cafe?utm_campaign=mkt-materiais-gc&amp;utm_source=textos&amp;utm_medium=blog\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-24250 size-full\" title=\"Clique e saiba mais sobre o curso!\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc.jpg\" alt=\"Curso Gest\u00e3o na Produ\u00e7\u00e3o de Caf\u00e9 Ar\u00e1bica\" width=\"980\" height=\"317\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc.jpg 980w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-300x97.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-768x248.jpg 768w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-370x120.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-270x87.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-740x239.jpg 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-150x49.jpg 150w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><\/a><\/p>\n<h3>Fontes de pot\u00e1ssio<\/h3>\n<p>Ap\u00f3s calculada a necessidade de pot\u00e1ssio por hectare e determinada a fonte de pot\u00e1ssio, faz-se o c\u00e1lculo da quantidade de adubo pot\u00e1ssico considerando porcentagem de K2O em cada fonte:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41759 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio.png\" alt=\"Tabela com fontes de fertilizantes de pot\u00e1ssio\" width=\"467\" height=\"203\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio.png 467w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio-300x130.png 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio-370x161.png 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio-270x117.png 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/tabela-fontes-potassio-150x65.png 150w\" sizes=\"auto, (max-width: 467px) 100vw, 467px\" \/><span class=\"c1\" style=\"font-size: 10pt;\">Fontes de fertilizantes fosfatados<\/span><\/p>\n<p>Das fontes citadas acima <strong>a mais utilizada \u00e9 o cloreto de pot\u00e1ssio<\/strong> devido ao seu menor custo quando comparado com outras fontes.<\/p>\n<p><iframe loading=\"lazy\" title=\"COMO ECONOMIZAR NA ADU\u00c7\u00c3O DE POT\u00c1SSIO NAS PLANTA\u00c7\u00d5ES DE CAF\u00c9? | Rehagro Responde - Caf\u00e9\" width=\"770\" height=\"433\" src=\"https:\/\/www.youtube.com\/embed\/4WgiVGazrec?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h3>Sintomas de defici\u00eancia de pot\u00e1ssio<\/h3>\n<p style=\"text-align: left;\">Os sintomas de defici\u00eancia de pot\u00e1ssio aparecem inicialmente em folhas velhas, sendo esse sintoma caracterizado por clorose com posterior necrose nos bordos e no \u00e1pice das folhas.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22621\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7.jpg\" alt=\"Folhas de cafeeiro com defici\u00eancia de pot\u00e1ssio\" width=\"600\" height=\"450\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7.jpg 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7-300x225.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7-370x278.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7-270x203.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7-80x60.jpg 80w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2019\/10\/adubacao-npk-7-150x113.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><span style=\"font-size: 10pt;\">Folhas com defici\u00eancia de Pot\u00e1ssio<\/span><\/p>\n<h2>Da aduba\u00e7\u00e3o \u00e0 gest\u00e3o: domine todas as etapas da produ\u00e7\u00e3o de caf\u00e9<\/h2>\n<p>Saber calcular corretamente a aduba\u00e7\u00e3o com NPK \u00e9 fundamental para garantir nutri\u00e7\u00e3o adequada das plantas e boa produtividade. Mas, para alcan\u00e7ar resultados consistentes e lucrativos, \u00e9 preciso ir al\u00e9m da aduba\u00e7\u00e3o e dominar tamb\u00e9m a gest\u00e3o completa da lavoura.<\/p>\n<p>No <strong><a href=\"https:\/\/rehagro.com.br\/cursos\/capacitacao-em-gestao-na-producao-de-cafe?utm_campaign=mkt-materiais-gc&amp;utm_source=textos&amp;utm_medium=blog\">Curso Gest\u00e3o na Produ\u00e7\u00e3o de Caf\u00e9 Ar\u00e1bica<\/a><\/strong> do Rehagro, voc\u00ea aprende a analisar custos, planejar o uso de insumos, implementar boas pr\u00e1ticas de manejo e tomar decis\u00f5es que aumentam a rentabilidade da propriedade.<\/p>\n<p><a href=\"https:\/\/rehagro.com.br\/cursos\/capacitacao-em-gestao-na-producao-de-cafe?utm_campaign=mkt-materiais-gc&amp;utm_source=textos&amp;utm_medium=blog\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-24250 size-full\" title=\"Clique e saiba mais sobre o curso!\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc.jpg\" alt=\"Curso Gest\u00e3o na Produ\u00e7\u00e3o de Caf\u00e9 Ar\u00e1bica\" width=\"980\" height=\"317\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc.jpg 980w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-300x97.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-768x248.jpg 768w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-370x120.jpg 370w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-270x87.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-740x239.jpg 740w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2023\/09\/banner-gc-150x49.jpg 150w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18459 size-full\" src=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/12\/larissa-cocato.jpg\" alt=\"Larissa Cocato - Coordenadora de Ensino Caf\u00e9\" width=\"300\" height=\"96\" srcset=\"https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/12\/larissa-cocato.jpg 300w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/12\/larissa-cocato-270x86.jpg 270w, https:\/\/rehagro.com.br\/blog\/wp-content\/uploads\/2022\/12\/larissa-cocato-150x48.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Os adubos NPK s\u00e3o compostos por tr\u00eas nutrientes chamados macronutrientes prim\u00e1rios: Nitrog\u00eanio (N), F\u00f3sforo (P) e Pot\u00e1ssio (K). A aduba\u00e7\u00e3o \u00e9 um aspecto muito importante que influencia na produtividade da cultura. Nesse sentido, um fornecimento adequado dos nutrientes tem interfer\u00eancia direta em seu crescimento. Florada de cafeeiro adulto (Foto: Diego Baqui\u00e3o). &nbsp; Sem tempo para [&hellip;]<\/p>\n","protected":false},"author":21,"featured_media":28930,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[211],"tags":[248,282,266],"class_list":["post-6031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cafe","tag-adubacao","tag-cafe","tag-cafeeiro"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Adubo NPK: como calcular a recomenda\u00e7\u00e3o para cafeeiros?<\/title>\n<meta name=\"description\" content=\"Voc\u00ea sabe como calcular a recomenda\u00e7\u00e3o para aduba\u00e7\u00e3o com fertilizantes NPK para cafeeiros em produ\u00e7\u00e3o? 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