{"id":1347,"date":"2021-08-10T11:00:05","date_gmt":"2021-08-10T09:00:05","guid":{"rendered":"https:\/\/urbag.eu\/?p=1347"},"modified":"2021-08-10T11:00:05","modified_gmt":"2021-08-10T09:00:05","slug":"publication-in-science-of-the-total-environment-3","status":"publish","type":"post","link":"https:\/\/webs.uab.cat\/atmosphere\/2021\/08\/10\/publication-in-science-of-the-total-environment-3\/","title":{"rendered":"Publication in Science of The Total Environment"},"content":{"rendered":"

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See full article\/ Veure l’article complet: https:\/\/doi.org\/10.1016\/j.scitotenv.2021.149424<\/a><\/strong><\/p>\n

English:<\/strong><\/p>\n

Urban agriculture (UA) is a means for cities to become more resilient in terms of food sovereignty while shortening the distance between production and consumption. However, intensive soilless UA still depends on the use of\u00a0fertilizers<\/a>, which relies on depleting non-renewable resources such as phosphorous (P) and causes both local and global impact for its production and application. With the aim to reduce such impacts and encourage a more efficient use of nutrients, this study assesses the\u00a0feasibility<\/a>\u00a0of using\u00a0struvite<\/a>\u00a0precipitated from an urban\u00a0wastewater treatment plant<\/a>\u00a0as the unique source of P fertilizer. To do so, we apply various quantities of struvite (ranging from 1 to 20 g\/plant) to the substrate of a\u00a0hydroponic<\/a>\u00a0Phaseolus vulgaris<\/em>\u00a0crop and determine the yield, water flows and P balances. The results show that treatments with more than 5 g of struvite per plant produced a higher yield (maximum of 181.41 g\/plant) than the control (134.6 g\/plant) with mineral fertilizer (KPO4<\/sub>H2<\/sub>). On the other hand, P concentration in all plant organs was always lower when using struvite than when using\u00a0chemical fertilizer<\/a>. Finally, the fact that different amounts of struvite remained undissolved in all treatments denotes the importance to balance between a correct P supply to the plant and a decrease of P lost through the leachates, based on the amount of struvite and the irrigated water. The findings of this study show that it is feasible for UA to efficiently use locally recovered nutrients such as P to produce local food.<\/p>\n

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Catal\u00e0:<\/strong><\/p>\n

L’agricultura urbana (UA) \u00e9s un mitj\u00e0 perqu\u00e8 les ciutats es tornin m\u00e9s resistents en termes de sobirania aliment\u00e0ria alhora que escurcen la dist\u00e0ncia entre producci\u00f3 i consum. No obstant aix\u00f2, la UA intensiva sense s\u00f2l encara dep\u00e8n de l’\u00fas de fertilitzants,<\/a> que es basa en esgotar recursos no renovables com el f\u00f2sfor (P) i causa un impacte tant local com global per a la seva producci\u00f3 i aplicaci\u00f3. Amb l’objectiu de reduir aquests impactes i fomentar un \u00fas m\u00e9s eficient dels nutrients, aquest estudi avalua la viabilitat d’utilitzar\u00a0 struvite<\/a>\u00a0 precipitat des d’una\u00a0 depuradora d’aig\u00fces<\/a> residuals<\/a> urbanes com a font \u00fanica de fertilitzant P. Per aix\u00f2, apliquem diverses quantitats de struvite (que van d’1 a 20 g\/planta) al substrat d’un cultiu hidrop\u00f2nic<\/a> \u00a0Phaseolus vulgaris<\/em>\u00a0 i determinem el rendiment, els fluxos d’aigua i els saldos P. Els resultats mostren que els tractaments amb m\u00e9s de 5 g de struvite per planta van produir un rendiment m\u00e9s alt (m\u00e0xim de 181,41 g\/planta) que el control (134,6 g\/planta) amb adob mineral (KPO4<\/sub>H2).<\/sub> D’altra banda, la concentraci\u00f3 de P en tots els \u00f2rgans vegetals sempre va ser menor quan s’utilitzava struvite que quan s’utilitzava adob qu\u00edmic.<\/a> Finalment, el fet que diferents quantitats de struvite es mantinguessin sense dissoldre en tots els tractaments denota la import\u00e0ncia d’equilibrar un correcte subministrament de P a la planta i una disminuci\u00f3 de P perdut a trav\u00e9s dels lixiviats, en funci\u00f3 de la quantitat de struvite i l’aigua de regadiu. Els resultats d’aquest estudi demostren que \u00e9s factible que la UA utilitzi eficientment nutrients recuperats localment com P per produir aliments locals.<\/p>\n

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Figure:<\/strong> Graphical abstract. Control\/Struvite treatment<\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Title: Recovered phosphorus for a more resilient urban agriculture: Assessment of the fertilizer potential of struvite in hydroponics \/ <\/p>\n

Urban agriculture (UA) is a means for cities to become more resilient in terms of food sovereignty while shortening the distance between production and consumption. However, intensive soilless UA still depends on the use of\u00a0fertilizers, which relies on depleting non-renewable resources.<\/p>\n","protected":false},"author":3153,"featured_media":1364,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[32,16,76,77,78,66,79,10,69],"class_list":["post-1347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-agriculture","tag-barcelona","tag-greenhouse","tag-icta","tag-resources","tag-rooftop","tag-tomato","tag-urbag","tag-water"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/users\/3153"}],"replies":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/comments?post=1347"}],"version-history":[{"count":0,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1347\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media\/1364"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media?parent=1347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/categories?post=1347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/tags?post=1347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}