{"id":60647,"date":"2018-01-05T10:33:23","date_gmt":"2018-01-05T15:33:23","guid":{"rendered":"https:\/\/www.agribusinessglobal.com\/?p=60647"},"modified":"2019-09-25T06:31:53","modified_gmt":"2019-09-25T10:31:53","slug":"seaweed-extracts-what-makes-them-work","status":"publish","type":"post","link":"https:\/\/www.agribusinessglobal.com\/pt\/plant-health\/biostimulants\/seaweed-extracts-what-makes-them-work\/","title":{"rendered":"Extratos de algas marinhas: o que os faz funcionar?"},"content":{"rendered":"<p>Em muitas regi\u00f5es costeiras, algas marinhas cruas t\u00eam sido usadas por mil\u00eanios para melhorar a produtividade dos sistemas agr\u00edcolas. Ent\u00e3o, na segunda metade do s\u00e9culo XX, o uso de extratos l\u00edquidos de algas marinhas em planta\u00e7\u00f5es se tornou difundido globalmente. Os agricultores que usam esses extratos relataram repetidamente resultados positivos no rendimento e na qualidade das planta\u00e7\u00f5es. Como esses resultados n\u00e3o podiam ser simplesmente correlacionados ao conte\u00fado de nutrientes elementares do extrato de algas marinhas, levou tempo para que uma explica\u00e7\u00e3o cient\u00edfica desses efeitos se concretizasse. \u00c0 medida que adquirimos uma compreens\u00e3o mais clara da bioqu\u00edmica das algas e dos modos de a\u00e7\u00e3o associados, n\u00e3o consideramos mais os extratos de algas marinhas como fertilizantes e, em vez disso, os classificamos como uma das principais classes de produtos no setor de bioestimulantes em r\u00e1pido desenvolvimento.<\/p>\n<p>Abaixo, vinculei os efeitos positivos observados ao usar extratos de algas marinhas aos conhecimentos cient\u00edficos mais recentes sobre os compostos presentes nas algas marinhas para aprofundar nossa compreens\u00e3o de como e quando usar produtos com extrato de algas marinhas para maximizar sua efic\u00e1cia.<\/p>\n<p>A maioria dos extratos de algas marinhas usados na agricultura como bioestimulantes s\u00e3o extra\u00eddos de esp\u00e9cies de algas marrons (Phaeophyceae); mais notavelmente as esp\u00e9cies <em>Ascophyllum nodosum<\/em> (n\u00f3 de madeira). Como <em>Ascophyllum nodosum<\/em> cresce na zona intermareal do Hemisf\u00e9rio Norte, foi proposto que as condi\u00e7\u00f5es estressantes de exposi\u00e7\u00e3o repetida \u00e0 desseca\u00e7\u00e3o, luz ultravioleta e flutua\u00e7\u00f5es de temperatura experimentadas pelas algas neste habitat, combinadas com uma taxa de crescimento mais lenta, levam \u00e0s altas concentra\u00e7\u00f5es de compostos bioativos presentes em <em>Asc\u00f3filo<\/em>. Em compara\u00e7\u00e3o, esp\u00e9cies tropicais, ou as algas que crescem mais longe no mar, produzem concentra\u00e7\u00f5es menores desses compostos bioativos e n\u00edveis mais altos de celulose; um composto que n\u00e3o \u00e9 novo nem capaz de estimular o crescimento das plantas.<\/p>\n<p>A partir de uma revis\u00e3o do material de marketing para extratos baseados em microalgas, parece que a \u00fanica vantagem reivindicada sobre os extratos de algas marrons \u00e9 um menor teor de s\u00f3dio, devido ao seu cultivo em \u00e1gua doce. No entanto, o cultivo de microalgas \u00e9 uma \u00e1rea de ficologia em r\u00e1pido desenvolvimento e, portanto, novos insights e produtos s\u00e3o esperados nos pr\u00f3ximos anos.<\/p>\n<h2>Horm\u00f4nios vegetais ou an\u00e1logos<\/h2>\n<p>Sabe-se que as algas cont\u00eam horm\u00f4nios vegetais e quando extratos de algas marinhas s\u00e3o aplicados \u00e0s plantas, a cultura exibe respostas semelhantes a quando horm\u00f4nios vegetais purificados\/sint\u00e9ticos s\u00e3o aplicados. No entanto, \u00e9 question\u00e1vel se essas respostas s\u00e3o realmente devidas aos horm\u00f4nios vegetais no extrato de algas marinhas. Isso ocorre porque a) muitos horm\u00f4nios vegetais s\u00e3o conhecidos por se decomporem facilmente na presen\u00e7a de luz, calor e condi\u00e7\u00f5es oxidantes (todas as quais um extrato experimentar\u00e1 durante seu tempo da extra\u00e7\u00e3o at\u00e9 a entrega no campo), e b) quando as pessoas analisaram extratos para horm\u00f4nios vegetais conhecidos, encontraram concentra\u00e7\u00f5es comparativamente baixas.<\/p>\n<p>Em vez disso, o paradigma aceito atualmente \u00e9 que os extratos de algas marinhas cont\u00eam an\u00e1logos de horm\u00f4nios vegetais. Esses an\u00e1logos possuem estruturas qu\u00edmicas diferentes do horm\u00f4nio vegetal correspondente, mas induzem a mesma\/semelhante resposta quando aplicados \u00e0 planta. Como resultado, respostas de crescimento positivas semelhantes \u00e0 a\u00e7\u00e3o da citocinina e\/ou auxina s\u00e3o comumente citadas.<\/p>\n<h2>Polissacar\u00eddeos de algas, monossacar\u00eddeos e \u00e1lcoois de a\u00e7\u00facar<\/h2>\n<p><a href=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-60649\" src=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1.jpg\" alt=\"Seaweed-Extract-1\" width=\"425\" height=\"441\" srcset=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1.jpg 838w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-289x300.jpg 289w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-768x797.jpg 768w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-318x330.jpg 318w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-69x72.jpg 69w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-347x360.jpg 347w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-555x576.jpg 555w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-694x720.jpg 694w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-82x85.jpg 82w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-300x311.jpg 300w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-1-150x156.jpg 150w\" sizes=\"auto, (max-width: 425px) 100vw, 425px\" \/><\/a>Uma gama de polissacar\u00eddeos \u00e9 exclusiva das algas e comp\u00f5e a maior parte da biomassa de algas marinhas. Isso \u00e9 ilustrado nas seguintes imagens de microsc\u00f3pio, onde v\u00e1rios polissacar\u00eddeos podem ser vistos fluorescentes (Mike Asquith, 2017).<\/p>\n<p>O principal componente da parede celular de algas verdes s\u00e3o as ulvanas, nas paredes celulares de algas vermelhas s\u00e3o os \u00e1garanos e carragenanos, e nas algas marrons s\u00e3o encontrados alginatos e fucanos nas paredes celulares e laminarina como um polissacar\u00eddeo de armazenamento. Esses polissacar\u00eddeos, juntamente com os oligossacar\u00eddeos e mon\u00f4meros que resultam de sua despolimeriza\u00e7\u00e3o durante qualquer processo de extra\u00e7\u00e3o, induzem respostas positivas quando aplicados \u00e0s planta\u00e7\u00f5es.<\/p>\n<p>Uma resposta positiva das plantas ao tratamento com polissacar\u00eddeos de algas repetidamente relatada em estudos acad\u00eamicos \u00e9 a indu\u00e7\u00e3o de <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3280573\/\" target=\"_blank\" rel=\"noopener noreferrer\">mecanismos de defesa das plantas<\/a>. Como esses compostos s\u00e3o exclusivos das algas, sabe-se que as plantas detectam a presen\u00e7a desses polissacar\u00eddeos como \u201cn\u00e3o pr\u00f3prios\u201d. A detec\u00e7\u00e3o de polissacar\u00eddeos de algas na membrana celular demonstrou ativar as vias de sinaliza\u00e7\u00e3o do \u00e1cido jasm\u00f4nico, \u00e1cido salic\u00edlico e etileno.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-60650\" src=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2.jpg\" alt=\"Seaweed-Extract-2\" width=\"896\" height=\"526\" srcset=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2.jpg 896w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-300x176.jpg 300w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-768x451.jpg 768w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-330x194.jpg 330w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-123x72.jpg 123w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-613x360.jpg 613w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-16x9.jpg 16w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-32x18.jpg 32w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-85x50.jpg 85w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Seaweed-Extract-2-150x88.jpg 150w\" sizes=\"auto, (max-width: 896px) 100vw, 896px\" \/><\/p>\n<p>Essas vias hormonais estimulam o ac\u00famulo de uma s\u00e9rie de compostos qu\u00edmicos e f\u00edsicos de prote\u00e7\u00e3o. A ativa\u00e7\u00e3o das defesas das plantas por extratos de algas marinhas pode, portanto, ser usada para proteger preventivamente contra estresse abi\u00f3tico e bi\u00f3tico em planta\u00e7\u00f5es. No entanto, tamb\u00e9m deve ser observado que n\u00e3o h\u00e1 evid\u00eancias atuais de um receptor espec\u00edfico em plantas para esses compostos, ent\u00e3o eles provavelmente funcionam estimulando um receptor para outro padr\u00e3o molecular associado a micr\u00f3bios polissacar\u00eddeos (MAMP), como a quitina. Portanto, se a indu\u00e7\u00e3o de defesas das plantas for seu objetivo principal, voc\u00ea deve considerar produtos que atuem diretamente em receptores-chave da membrana celular, pois eles devem se mostrar mais eficazes no campo. Tamb\u00e9m pode haver raz\u00f5es regulat\u00f3rias em sua regi\u00e3o que podem dissuadi-lo de usar extratos de algas marinhas para se preparar contra estresses bi\u00f3ticos.<\/p>\n<p>Al\u00e9m da prepara\u00e7\u00e3o da defesa das plantas, h\u00e1 uma s\u00e9rie de outros modos de a\u00e7\u00e3o para polissacar\u00eddeos de algas com base em suas propriedades bioqu\u00edmicas espec\u00edficas;<\/p>\n<p><strong>Alginatos (\u00e1cido alg\u00ednico)<br \/>\n<\/strong>Alginatos s\u00e3o o polissacar\u00eddeo que d\u00e1 \u00e0s algas marrons sua natureza gelatinosa. Eles est\u00e3o presentes em n\u00edveis muito altos em todas as algas marrons. Os alginatos s\u00e3o extra\u00eddos de algas marrons para uso m\u00e9dico (por exemplo, Gaviscon). Na agricultura, a propriedade de forma\u00e7\u00e3o de gel dos alginatos permite a forma\u00e7\u00e3o de microcoloides sobre a superf\u00edcie das plantas, que s\u00e3o pensados para atuar como uma pel\u00edcula protetora. Os alginatos tamb\u00e9m atuar\u00e3o como uma fonte de alimento e nutrientes para micr\u00f3bios ben\u00e9ficos. Isso inclui antagonistas que excluem pat\u00f3genos de colonizar a superf\u00edcie da folha e aqueles que exalam horm\u00f4nios vegetais.<\/p>\n<p><strong>Manitol<br \/>\n<\/strong>O \u00e1lcool de a\u00e7\u00facar manitol \u00e9 encontrado em altas concentra\u00e7\u00f5es em algas marrons. Sendo sol\u00faveis em \u00e1gua, muitos extratos de algas cont\u00eam bons n\u00edveis de manitol. O manitol \u00e9 um composto multifuncional e tem tr\u00eas \u00e1reas principais de atividade:<\/p>\n<ul>\n<li><strong>Antioxidante.<\/strong>\u00a0O manitol \u00e9 capaz de \u201climpar\u201d as esp\u00e9cies reativas de oxig\u00eanio (ROS) que criam os radicais livres que danificam os tecidos vegetais. Os ROS s\u00e3o produzidos em altos n\u00edveis quando as plantas est\u00e3o sob estresses abi\u00f3ticos e, portanto, um extrato de algas marinhas contendo manitol seria uma boa escolha em condi\u00e7\u00f5es estressantes de cultivo.<\/li>\n<li>\n<div id=\"attachment_60648\" style=\"width: 385px\" class=\"wp-caption alignright\"><a href=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-60648\" class=\"wp-image-60648\" src=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure.jpg\" alt=\"Mannitol-chemical-structure\" width=\"375\" height=\"238\" srcset=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure.jpg 425w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-300x191.jpg 300w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-330x210.jpg 330w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-113x72.jpg 113w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-16x9.jpg 16w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-85x54.jpg 85w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Mannitol-chemical-structure-150x95.jpg 150w\" sizes=\"auto, (max-width: 375px) 100vw, 375px\" \/><\/a><p id=\"caption-attachment-60648\" class=\"wp-caption-text\">O manitol \u00e9 capaz de formar um complexo com \u00e1tomos de boro<\/p><\/div>\n<p><strong>Complexa\u00e7\u00e3o de boro.<\/strong> O manitol \u00e9 capaz de formar um complexo com \u00e1tomos de boro, quelando efetivamente um importante nutriente vegetal.<\/li>\n<li><strong>Sinaliza\u00e7\u00e3o em ataque f\u00fangico.<\/strong> Os fungos patog\u00eanicos tamb\u00e9m usam manitol para extinguir ROS ao atacar uma planta. A intera\u00e7\u00e3o entre manitol e as enzimas da planta que degradam o manitol \u00e9 uma intera\u00e7\u00e3o importante na luta entre uma planta cultivada e um pat\u00f3geno que determina se uma doen\u00e7a se instala (<a href=\"http:\/\/www.pnas.org\/content\/95\/25\/15129.full.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">refer\u00eancia<\/a>). Como resultado, recomendo que extratos de algas marinhas n\u00e3o sejam aplicados se a cultura j\u00e1 estiver sofrendo de uma doen\u00e7a f\u00fangica.<\/li>\n<\/ul>\n<p><strong>Fucanos<\/strong><br \/>\nAs algas marrons tamb\u00e9m cont\u00eam n\u00edveis significativos de polissacar\u00eddeos sulfonados conhecidos como fucanos ou fucoidanos. Infelizmente, h\u00e1 uma escassez de estudos sobre como eles funcionam quando aplicados \u00e0s plantas, no entanto, seus <a href=\"https:\/\/scholar.google.co.uk\/scholar?hl=en&amp;q=fucoidan+effects&amp;btnG=&amp;as_sdt=1%2C5&amp;as_sdtp\" target=\"_blank\" rel=\"noopener noreferrer\">o uso e os efeitos em animais e humanos s\u00e3o muito mais bem estudados<\/a>.<\/p>\n<h2>Vitaminas e minerais<\/h2>\n<p><strong>Iodo<\/strong><br \/>\n\u00c9 bem sabido que algas marinhas s\u00e3o uma boa fonte de iodo, na forma de iodeto. Como \u00e9 o caso dos fucanos, a fun\u00e7\u00e3o do iodo na sa\u00fade humana\/animal \u00e9 muito mais bem compreendida do que em como ele funciona nas plantas. Foi proposto que ele poderia influenciar a intera\u00e7\u00e3o com micr\u00f3bios ben\u00e9ficos ou ajudar na biofortifica\u00e7\u00e3o de culturas destinadas \u00e0 ra\u00e7\u00e3o\/comida, mas os relatos s\u00e3o limitados.<\/p>\n<p><strong>Vitamina B12 (cobalamina)<\/strong><\/p>\n<div id=\"attachment_60651\" style=\"width: 385px\" class=\"wp-caption alignright\"><a href=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-60651\" class=\"wp-image-60651\" src=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure.jpg\" alt=\"Vitamin-B12-Chemical-Structure\" width=\"375\" height=\"427\" srcset=\"https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure.jpg 550w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-264x300.jpg 264w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-290x330.jpg 290w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-63x72.jpg 63w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-316x360.jpg 316w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-506x576.jpg 506w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-75x85.jpg 75w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-300x341.jpg 300w, https:\/\/d6kq167ddwbdq.cloudfront.net\/farmchemint\/wp-content\/uploads\/2018\/01\/Vitamin-B12-Chemical-Structure-150x171.jpg 150w\" sizes=\"auto, (max-width: 375px) 100vw, 375px\" \/><\/a><p id=\"caption-attachment-60651\" class=\"wp-caption-text\">Se voc\u00ea estudar a estrutura qu\u00edmica da vitamina B12, ver\u00e1 que ela \u00e9 uma quela\u00e7\u00e3o natural do cobalto.<\/p><\/div>\n<p>A vitamina B12 \u00e9 bem conhecida por sua import\u00e2ncia na sa\u00fade humana. No entanto, para plantas, ela tamb\u00e9m pode ser \u00fatil. Se voc\u00ea estudar sua estrutura qu\u00edmica (veja a imagem), ver\u00e1 que \u00e9 uma quela\u00e7\u00e3o natural do cobalto. Acredita-se que o cobalto seja essencial para o crescimento de v\u00e1rias plantas cultivadas e melhora o crescimento de outras. Al\u00e9m disso, o cobalto \u00e9 essencial para as enzimas envolvidas na fixa\u00e7\u00e3o de nitrog\u00eanio por bact\u00e9rias. A vitamina B12 n\u00e3o \u00e9 sintetizada em plantas ou animais, mas as algas cont\u00eam altas quantidades e os extratos de algas s\u00e3o uma boa fonte desse nutriente.<\/p>\n<p>No entanto, a vitamina B12 \u00e9 altamente sens\u00edvel \u00e0s condi\u00e7\u00f5es alcalinas (<a href=\"https:\/\/www.dsm.com\/content\/dam\/dsm\/nip\/en_US\/documents\/stability.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">refer\u00eancia<\/a>), ent\u00e3o se o cobalto for de interesse, considere usar um extrato de algas marinhas prensado a frio. Curiosamente, acredita-se que a vitamina B12 encontrada nas algas marinhas n\u00e3o \u00e9 sintetizada pelas pr\u00f3prias algas, mas pelas bact\u00e9rias que crescem em suas superf\u00edcies em seu habitat natural intermareal (litoral) (<a href=\"https:\/\/link.springer.com\/article\/10.1007\/s10811-016-0974-5\" target=\"_blank\" rel=\"noopener noreferrer\">refer\u00eancia<\/a>).<\/p>\n<h2>O que voc\u00ea n\u00e3o encontrar\u00e1 em extratos de algas marinhas<\/h2>\n<p>Assim como todos os ingredientes ativos nas algas, h\u00e1 alega\u00e7\u00f5es de que elas tamb\u00e9m s\u00e3o uma boa fonte de outros compostos. Muitas vezes voc\u00ea ver\u00e1 alega\u00e7\u00f5es de que os extratos de algas s\u00e3o uma boa fonte de amino\u00e1cidos, mas se as algas fossem uma boa fonte de amino\u00e1cidos, n\u00f3s as comer\u00edamos por seu conte\u00fado de prote\u00edna, mas isso n\u00e3o \u00e9 verdade. Como resultado, os extratos de algas cont\u00eam apenas n\u00edveis muito baixos de amino\u00e1cidos naturalmente e se voc\u00ea estiver procurando por um bioestimulante de amino\u00e1cidos, h\u00e1 alternativas muito melhores dispon\u00edveis.<\/p>\n<p>Alguns extratos de algas marinhas s\u00e3o formulados para conter altos n\u00edveis de macronutrientes vegetais. No entanto, os extratos de algas marinhas cont\u00eam naturalmente n\u00edveis muito baixos de todos os macronutrientes, com valores t\u00edpicos de menos de 1% p\/v. Os extratos de algas marinhas vendidos com valores de NPK muito mais altos ter\u00e3o nutrientes extras adicionados ou, no caso de extratos alcalinos, haver\u00e1 pot\u00e1ssio presente devido ao uso de hidr\u00f3xido de pot\u00e1ssio necess\u00e1rio para a extra\u00e7\u00e3o qu\u00edmica. Portanto, \u00e9 recomend\u00e1vel que voc\u00ea n\u00e3o escolha um extrato de algas marinhas puramente por seu conte\u00fado nutricional.<\/p>\n<p>Concluindo, \u00e0 medida que ganhamos mais insights sobre os mecanismos pelos quais os extratos de algas marinhas funcionam nas planta\u00e7\u00f5es, espero que comecemos a ver a ind\u00fastria se afastar da abordagem de marketing de &quot;uso para melhorar o crescimento das plantas&quot; em dire\u00e7\u00e3o a uma estrat\u00e9gia mais cient\u00edfica e informada. Se voc\u00ea quiser saber mais sobre extratos de algas marinhas, como us\u00e1-los ou a diferen\u00e7a entre os m\u00e9todos de extra\u00e7\u00e3o, entre em contato.<\/p>","protected":false},"excerpt":{"rendered":"<p>Em muitas regi\u00f5es costeiras, algas marinhas cruas t\u00eam sido usadas por mil\u00eanios para melhorar a produtividade dos sistemas agr\u00edcolas. Ent\u00e3o, em\u2026<\/p>","protected":false},"author":110,"featured_media":60650,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[929],"tags":[554,1518],"class_list":["post-60647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biostimulants","tag-featured","tag-seaweed"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Seaweed Extracts: What Makes Them Work? - AgriBusiness Global<\/title>\n<meta name=\"description\" content=\"In many coastal regions, raw seaweed has been used for millennia to improve the productivity of farming systems. 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