{"id":1522,"date":"2022-01-25T15:09:01","date_gmt":"2022-01-25T13:09:01","guid":{"rendered":"https:\/\/urbag.eu\/?p=1522"},"modified":"2022-01-25T15:09:01","modified_gmt":"2022-01-25T13:09:01","slug":"publication-in-resources-conservation-recycling-2","status":"publish","type":"post","link":"https:\/\/webs.uab.cat\/atmosphere\/2022\/01\/25\/publication-in-resources-conservation-recycling-2\/","title":{"rendered":"Publication in Resources, Conservation & Recycling"},"content":{"rendered":"

\"\"<\/a><\/p>\n

See full article\/ Veure l’article complet<\/strong><\/a><\/p>\n

 <\/p>\n

English:<\/h3>\n

Hydroponic<\/a>\u00a0systems are an attractive form of urban agriculture due to their low weight load, inert substrate conditions, and overall better control of plant nutrition and growth. However, gaining urban food sovereignty cannot be at the cost of increasing\u00a0environmental impacts<\/a>, such as\u00a0eutrophication<\/a>\u00a0and\u00a0nonrenewable resource<\/a>\u00a0depletion, associated with phosphorus\u00a0fertilizer<\/a>\u00a0use.\u00a0Struvite<\/a>, a wastewater byproduct, is a potential slow-releasing P source that can serve as a substitute for mineral P fertilizer. In this study, we explored the adequacy struvite in hydroponic systems, testing different quantities (5\u00a0g, 10\u00a0g and 20\u00a0g per plant) compared with monopotassium phosphate for pepper and lettuce hydroponic production. The results show competitive productions for both crops with the use of struvite, especially during the first lettuce harvest (225.5\u00a0g, 249.9\u00a0g, 272.6\u00a0g, and 250\u00a0g for 5\u00a0g, 10\u00a0g, 20\u00a0g and control, respectively) where a greater struvite dissolution was seen. Although all struvite treatments in pepper show low\u00a0phosphorous content<\/a>\u00a0in the biomass, yields do not deviate greatly from the control (3.6\u00a0kg, 4.3\u00a0kg, 7.5\u00a0kg and 5.3\u00a0kg for 5\u00a0g, 10\u00a0g, 20\u00a0g and control, respectively). The environmental performance of all lettuce treatments showed a reduction in all impact categories, especially freshwater eutrophication and mineral resource scarcity, except for marine eutrophication. All impact categories were reduced for all pepper treatments with 10\u00a0g and 20\u00a0g of struvite. When the results are extrapolated to a full year of production, we find that the slow dissolution of struvite can sustain competitive production with an initial 20\u00a0g, with less impact in all categories except marine eutrophication<\/p>\n

\n

Catal\u00e0:<\/h3>\n

Els sistemes hidrop\u00f2nics<\/a> s\u00f3n una forma atractiva d’agricultura urbana a causa de la seva baixa c\u00e0rrega de pes, les condicions del substrat inert i, en general, pel millor control de la nutrici\u00f3 i el creixement de les plantes. No obstant aix\u00f2, guanyar sobirania aliment\u00e0ria urbana no pot ser a costa d’incrementar impactes ambientals<\/a>, \u00a0com l’eutrofitzaci\u00f3\u00a0 i l’esgotament dels recursos no renovables,<\/a> associats amb l’\u00fas de fertilitzants<\/a> de f\u00f2sfor.\u00a0 \u201cStruvite<\/a>\u201d, un subproducte d’aig\u00fces residuals, \u00e9s una font P potencial d’alliberament lent que pot servir com a substitut de fertilitzants P minerals. En aquest estudi, vam explorar l’estructura d’adequaci\u00f3 en sistemes hidrop\u00f2nics, provant diferents quantitats (5 g, 10 g i 20 g per planta) en comparaci\u00f3 amb el fosfat \u201cmonopotassium\u201d per a la producci\u00f3 hidrop\u00f2nica de pebrot i enciam. Els resultats mostren produccions competitives per a tots dos cultius amb l’\u00fas de struvite, especialment durant la primera collita d’enciams (225.5 g, 249.9 g, 272.6 g i 250 g per 5 g, 10 g, 20 g i control, respectivament) on es va observar una major dissoluci\u00f3 de struvite. Tot i que tots els tractaments de struvite en pebrots mostren un baix contingut de f\u00f2sfor<\/a>\u00a0 en la biomassa, els rendiments no es desvien en gran mesura del control (3.6 kg, 4.3 kg, 7.5 kg i 5.3 kg per 5 g, 10 g, 20 g i control, respectivament). El rendiment ambiental de tots els tractaments d’enciam va mostrar una reducci\u00f3 en totes les categories d’impactes, especialment l’eutrofitzaci\u00f3 d’aigua dol\u00e7a i l’escassetat de recursos minerals, excepte l’eutrofitzaci\u00f3 marina. Totes les categories d’impactes es van reduir per a tots els tractaments de pebrot amb 10 g i 20 g de struvite. Quan els resultats s’extrapolen a un any complet de producci\u00f3, trobem que la lenta dissoluci\u00f3 del struvite pot sostenir la producci\u00f3 competitiva amb una producci\u00f3 inicial de 20 g, amb menys impacte en totes les categories excepte l’eutrofitzaci\u00f3 marina.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n

\n

Figure<\/strong>: Graphical abstract. Methodology used and first results.<\/p>\n","protected":false},"excerpt":{"rendered":"

Title: Extended use and optimization of struvite in hydroponic cultivation systems \/ <\/p>\n

Hydroponic\u00a0systems are an attractive form of urban agriculture due to their low weight load, inert substrate conditions, and overall better control of plant nutrition and growth. However, gaining urban food sovereignty cannot be at the cost of increasing\u00a0environmental impacts.<\/p>\n","protected":false},"author":3153,"featured_media":1536,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[124,110,125,126,10,15,113],"class_list":["post-1522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-hydroponic","tag-life-cycle-assessment","tag-phosphorus-depletion","tag-struvite","tag-urbag","tag-urban-agriculture","tag-vegetables"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1522","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=1522"}],"version-history":[{"count":0,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1522\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media\/1536"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media?parent=1522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/categories?post=1522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/tags?post=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}