{"id":41392,"date":"2020-10-21T09:35:35","date_gmt":"2020-10-21T07:35:35","guid":{"rendered":"https:\/\/www.bioecoactual.com\/?p=41392"},"modified":"2020-10-21T09:50:17","modified_gmt":"2020-10-21T07:50:17","slug":"cultius-convencionals-ecologics-i-hidroponics-efectes-en-el-medi-ambient","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2020\/10\/21\/cultius-convencionals-ecologics-i-hidroponics-efectes-en-el-medi-ambient\/","title":{"rendered":"Cultius convencionals, ecol\u00f2gics i hidrop\u00f2nics: efectes en el medi ambient"},"content":{"rendered":"<p>L&#8217;emissi\u00f3 de gasos d&#8217;efecte hivernacle (causants del canvi clim\u00e0tic) i la contaminaci\u00f3 per pl\u00e0stics, s&#8217;han situat en els \u00faltims anys en les primeres posicions de la llista de problemes ambientals a escala global, per aix\u00f2 els <strong>cultius ecol\u00f2gics<\/strong> s\u00f3n cada cop m\u00e9s imprescindibles.<!--more--><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41382 size-full\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/medio-ambiente.jpg\" alt=\"els cultius ecol\u00f2gics s\u00f3n cada cop m\u00e9s imprescindibles\" width=\"1000\" height=\"666\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/medio-ambiente.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/medio-ambiente-768x511.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/medio-ambiente-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/medio-ambiente-631x420.jpg 631w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>La incorrecta gesti\u00f3 del s\u00f2l i altres problemes derivats de l&#8217;agricultura intensiva podrien molt b\u00e9 ocupar la tercera posici\u00f3 en aquest lamentable podi.<\/p>\n<p><strong>Desforestaci\u00f3, \u00fas massiu i indiscriminat de productes qu\u00edmics de s\u00edntesi com insecticides i herbicides, contaminaci\u00f3 i sobreexplotaci\u00f3 de l&#8217;aigua, productes transg\u00e8nics, monocultius i p\u00e8rdua de biodiversitat&#8230;<\/strong> Aquests s\u00f3n alguns dels motius pels quals <strong>l&#8217;agricultura intensiva o convencional<\/strong> es mereix com a m\u00ednim \u00a0aquesta medalla de bronze.<\/p>\n<h2>Producci\u00f3\u00a0 recuperaci\u00f3 natural<\/h2>\n<p><strong>La desforestaci\u00f3<\/strong> d&#8217;\u00e0mplies zones de la conca amaz\u00f2nica per a la implantaci\u00f3 de pastures per a bestiar bov\u00ed i cultius com la soja o les palmeres d&#8217;oli son un exemple d&#8217;aquest tipus d&#8217;impactes, sobretot perqu\u00e8 la productivitat agr\u00edcola d&#8217;aquestes terres \u00e9s molt baixa i la seva recuperaci\u00f3 natural molt dif\u00edcil.<\/p>\n<p>En aquest sentit, una investigaci\u00f3 liderada per experts de la Universitat de Cambridge (Regne Unit), publicada a la tardor de 2018 a la revista <em>Nature Sustainability<\/em>, reconeixia que hi ha pocs estudis que mostrin de forma integrada els beneficis i costos ambientals de l&#8217;agricultura que denominen d&#8217;alt rendiment (convencional o industrialitzada).<\/p>\n<p>En alguns casos, aconseguir produccions agr\u00edcoles elevades -en relaci\u00f3 a la superf\u00edcie de terra ocupada- pot ser benefici\u00f3s per al conjunt de l&#8217;entorn per\u00f2, com indica aquesta investigaci\u00f3, s&#8217;han de tenir tamb\u00e9 en compte altres factors com la necessitat de grans quantitats d&#8217;agroqu\u00edmics i aigua per fer viables aquests cultius que te\u00f2ricament pretenen acabar amb la fam al m\u00f3n.<\/p>\n<h3>Augment de la agricultura ecol\u00f2gica<\/h3>\n<p>Un dels escassos <strong>elements per a l&#8217;esperan\u00e7a \u00e9s el creixent augment de l&#8217;agricultura ecol\u00f2gica i l&#8217;agricultura integrada<\/strong>; a m\u00e9s d&#8217;obrir-se l&#8217;oportunitat per a una correcta utilitzaci\u00f3 d&#8217;alternatives com <strong>l&#8217;agricultura hidrop\u00f2nica<\/strong>.<\/p>\n<blockquote><p>L&#8217;agricultura ecol\u00f2gica porta a terme pr\u00e0ctiques de gesti\u00f3 que mantenen i incrementen la fertilitat del s\u00f2l a llarg termini i eviten la propagaci\u00f3 de plagues i malalties<\/p><\/blockquote>\n<h3>FAO\u00a0 agricultura ecol\u00f2gica<\/h3>\n<p>La p\u00e0gina a internet del grup de treball sobre <strong>agricultura ecol\u00f2gica<\/strong> de la FAO recorda que l&#8217;agricultura ecol\u00f2gica \u00e9s \u201c<strong>un sistema que comen\u00e7a per tenir en compte les possibles repercussions ambientals i socials eliminant la utilitzaci\u00f3 d&#8217;insums, com fertilitzants i plaguicides sint\u00e8tics, medicaments veterinaris, llavors i esp\u00e8cies modificades gen\u00e8ticament, conservadors, additius i irradiaci\u00f3.\u201d<\/strong> En comptes de tot aix\u00f2 es duen a terme pr\u00e0ctiques de gesti\u00f3 espec\u00edfiques per al lloc de qu\u00e8 es tracti, que \u201c<strong>mantenen i incrementen la fertilitat de terra a llarg termini i eviten la propagaci\u00f3 de plagues i malalties\u201d<\/strong>, indica aquest grup de treball de la FAO.<\/p>\n<p>La visi\u00f3 actual de la FAO que s&#8217;exposa en aquest text suposa un avan\u00e7 important respecte a la posici\u00f3 adoptada per aquest organisme de Nacions Unides sobre agricultura ecol\u00f2gica i medi ambient en cimera del seu comit\u00e8 d&#8217;Agricultura celebrat a Roma al gener de 1999, quan per primera vegada es va abordar aquest debat.<\/p>\n<p>Fa dues d\u00e8cades la FAO admetia els objectius ambientals de l&#8217;agricultura ecol\u00f2gica per\u00f2, immediatament despr\u00e9s, advertia: &#8220;Tot i aix\u00f2, l&#8217;agricultura org\u00e0nica pot tenir efectes negatius i no \u00e9s l&#8217;\u00fanic m\u00e8tode per assegurar un sistema de cultiu sostenible&#8221;. En aquest document es podia llegir entre l\u00ednies una defensa de l&#8217;anomenada <strong>agricultura integrada<\/strong>, un model que proposa la producci\u00f3 racional i sostenible d&#8217;aliments, minimitzant l&#8217;impacte en el medi ambient i potenciant m\u00e8todes per a la producci\u00f3 d&#8217;aliments lliures de residus t\u00f2xics, encara que permetent l&#8217;\u00fas de reg, fertilitzants i productes qu\u00edmics que els seus promotors consideren imprescindibles per ajudar a controlar l&#8217;aparici\u00f3 de plagues i malalties en els vegetals.<\/p>\n<h2>Cultius hidrop\u00f2nics: una alternativa diferent<\/h2>\n<p>La <strong>hidroponia <\/strong>o cultiu de plantes en el qual es subministra a les arrels dissolucions nutritives de minerals (en comptes de fer-ho mitjan\u00e7ant el s\u00f2l agr\u00edcola) \u00e9s una altra f\u00f3rmula d&#8217;aconseguir vegetals (aliments o plantes ornamentals, per exemple) amb un impacte redu\u00eft sobre el medi ambient, sempre que el seu desenvolupament sigui acurat i s&#8217;evitin els problemes de la producci\u00f3 industrialitzada.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-41385 size-full\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/agricultura-2.jpg\" alt=\"cultius hidrop\u00f2nics\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/agricultura-2.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/agricultura-2-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/agricultura-2-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/agricultura-2-630x420.jpg 630w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>El manual t\u00e8cnic &#8216;L&#8217;horta hidrop\u00f2nica popular&#8217; publicat per l&#8217;oficina regional de la FAO per a Am\u00e8rica Llatina i el Carib destaca que la hidroponia o &#8220;cultiu sense terra&#8221; \u00e9s una alternativa \u00f2ptima per a la producci\u00f3 d&#8217;aliments i la millora de la qualitat de vida &#8220;amb redu\u00eft consum d&#8217;aigua, aprofitant en moltes ocasions elements rebutjats, que de no ser utilitzats causarien contaminaci\u00f3. A m\u00e9s, en zones com les referides en aquest manual, la hidroponia \u00e9s \u201cuna opci\u00f3 imaginativa en la lluita contra la pobresa&#8221;.<\/p>\n<blockquote><p>La difer\u00e8ncia \u00e9s especialment destacada en el cas de cultius convencionals que requereixen desforestar grans extensions per obtenir noves terres f\u00e8rtils<\/p><\/blockquote>\n<p>En el mateix sentit, altres estudis recorden que els cultius o jardins hidrop\u00f2nics ofereixen una forma d&#8217;agricultura amb un consum d&#8217;aigua relativament baix -en part degut a que s&#8217;utilitzen substrats que permeten una alta retenci\u00f3 de humitat- i amb un impacte ambiental molt redu\u00eft. La difer\u00e8ncia \u00e9s especialment destacada en el cas de cultius convencionals que requereixen desforestar grans extensions per obtenir noves terres f\u00e8rtils.<\/p>\n<p>En aquest cas, i <strong>davant la creixent aparici\u00f3 de grans cultius hidrop\u00f2nics que repeteixen els errors de l&#8217;agricultura convencional (industrialitzada), l&#8217;alternativa m\u00e9s respectuosa amb el medi ambient \u00e9s la hidroponia org\u00e0nica o ecol\u00f2gica<\/strong>. En aquesta alternativa de producci\u00f3, els cultius s&#8217;aconsegueixen amb nutrient de fonts no sint\u00e8tiques i amb sistemes de control de plagues a base de subst\u00e0ncies elaborades amb productes naturals. &#8220;Aquest m\u00e8tode \u00e9s m\u00e9s elaborat i m\u00e9s cost\u00f3s que la hidroponia normal, per\u00f2, \u00e9s m\u00e9s saludable i m\u00e9s atractiu per als consumidors&#8221;, explica a la seva p\u00e0gina especialitzada AADAA Agricultura T\u00e8cnica Avan\u00e7ada.<\/p>\n<p>M\u00e9s informaci\u00f3:<\/p>\n<ul>\n<li><a href=\"https:\/\/gicsaecologico.wordpress.com\/2017\/07\/13\/que-es-un-huerto-hidroponico-y-como-ayuda-al-medio-ambiente\/\" target=\"_blank\" rel=\"noopener noreferrer\">Desenvolupament immobiliari ecol\u00f2gic <\/a><\/li>\n<li><a href=\"http:\/\/www.fao.org\/3\/a-ah501s.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">La huerta hidrop\u00f3nica popular<\/a><\/li>\n<li>\n<p class=\"c-article-title\" data-test=\"article-title\"><a href=\"https:\/\/www.nature.com\/articles\/s41893-018-0138-5\" target=\"_blank\" rel=\"noopener noreferrer\">The environmental costs and benefits of high-yield farming<\/a><\/p>\n<\/li>\n<li><a href=\"http:\/\/www.fao.org\/3\/X0075s\/X0075s.htm#P129_20255\" target=\"_blank\" rel=\"noopener noreferrer\">Efectos sobre el medio ambiente y sostenibilidad (FAO<\/a>)<\/li>\n<li><a href=\"http:\/\/www.fao.org\/organicag\/oa-faq\/oa-faq1\/es\/\" target=\"_blank\" rel=\"noopener noreferrer\">Agricultura Org\u00e1nica<\/a><\/li>\n<li><a href=\"https:\/\/aadaa.es\/que-es-la-hidroponia-organica\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00bfQu\u00e9 es la Hidropon\u00eda org\u00e1nica?<\/a><\/li>\n<\/ul>\n<p><strong>Autor<\/strong>: Joaquim Elcacho, Periodista especialitzat en Medi Ambient i Ci\u00e8ncia<\/p>\n<p><a href=\"https:\/\/www.bioecoactual.com\/suscripcion\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Suscr\u00edbete<\/strong><\/a><strong> a la Newsletter y recibe Bio Eco Actual gratis cada mes en tu correo<\/strong><\/p>\n<p><strong><a href=\"https:\/\/www.bioecoactual.com\/ca\/subscripcio\/\" target=\"_blank\" rel=\"noopener noreferrer\">Subscriu-te<\/a> a la Newsletter i rep cada mes Bio Eco Actual gratis al teu correu<\/strong><\/p>\n<p><strong><em>Bio Eco Actual<\/em>, <em>el teu mensual 100% ecol\u00f2gic<\/em><br \/>\nLlegir <\/strong><a href=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/09\/BioEcoActual_Catala_Octubre_2020.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Bio Eco Actual Octubre 2020<\/strong><\/a><\/p>\n<p><iframe style=\"border: none; width: 100%; height: 520px;\" src=\"\/\/e.issuu.com\/embed.html?d=bioecoactual_catala_octubre_2020&amp;hideIssuuLogo=true&amp;showOtherPublicationsAsSuggestions=true&amp;u=bioecoactual\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;emissi&oacute; de gasos d&rsquo;efecte hivernacle (causants del canvi clim&agrave;tic) i la contaminaci&oacute; per pl&agrave;stics, s&rsquo;han situat en els &uacute;ltims anys en les primeres posicions de la llista de problemes ambientals a escala global, per aix&ograve; els cultius ecol&ograve;gics s&oacute;n cada cop m&eacute;s imprescindibles.<\/p>\n","protected":false},"author":419,"featured_media":41383,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7164,7160],"tags":[],"class_list":["post-41392","post","type-post","status-publish","format-standard","has-post-thumbnail","category-actualitat","category-medi-ambient"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Cultius convencionals, ecol\u00f2gics i hidrop\u00f2nics - Bio Eco Actual<\/title>\n<meta name=\"description\" content=\"Els cultius ecol\u00f2gics s\u00f3n cada cop m\u00e9s 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