{"id":54978,"date":"2006-09-10T00:00:00","date_gmt":"2006-09-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/defensa-de-heladas-primaverales-en-especies-frutales-y-horta%c2%adcolas-mediante-el-uso-de-crioprotectores\/"},"modified":"2006-09-10T00:00:00","modified_gmt":"2006-09-10T00:00:00","slug":"defensa-de-heladas-primaverales-en-especies-frutales-y-horta%c2%adcolas-mediante-el-uso-de-crioprotectores","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/tecnicas-de-cultivo\/defensa-de-heladas-primaverales-en-especies-frutales-y-horta%c2%adcolas-mediante-el-uso-de-crioprotectores\/","title":{"rendered":"Defensa de heladas primaverales en especies frutales y hort\u00edcolas mediante el uso de crioprotectores"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Rub\u00e9n Moratiel Yugueros <\/strong><\/h2>\n<p>En la actualidad, en climas templados el factor m\u00e1s importante de p\u00e9rdidas  sobre plantaciones frutales son las heladas primaverales. Los m\u00e9todos directos de defensa existentes requieren unas inversiones y recursos muy grandes, lo que hace que en muchas plantaciones se consideren inviables.  durante los a\u00f1os del 2001 al 2005 se plantean unos ensayos destinados a la b\u00fasqueda de crioprotectores susceptibles de ser utilizados en especies vegetales. Los ensayos planteados se dividen en cuatro fases: 1, an\u00e1lisis calorim\u00e9tricos sobre tejidos foliares de tomate (lycopersicum esculentum), almendro (prunus amigdalus), melocotonero (prunus persica), cerezo (prunus avium), peral (pyrus communis) y manzano (malus domestica); 2, simulaciones de heladas en c\u00e1mara de laboratorio a plantones de pepino (cucumis sativus) y tomate (lycopersicum esculentum) y sobre yemas fruct\u00edferas de las especies frutales anteriormente citadas; 3, simulaciones de heladas a \u00e1rboles completos de porte medio mediante un m\u00f3dulo dise\u00f1ado y construido para tal fin en las especies frutales anteriores y 4, ensayos en fincas experimentales de producci\u00f3n de cerezo (prunus avium) y ciruelo (prunus domestica).  de los ensayos anteriores se dedujo que la aplicaci\u00f3n de crioprotectores compuestos por polioles y antioxidantes, aplicados foliarmente entre las  8 y 24 horas antes de una helada, era capaz de aumentar la viabilidad de las yemas fruct\u00edferas entre un 20 y 40 % con respecto a la zona no tratada, aunque este porcentaje depende de la intensidad de la helada. Con temperaturas m\u00ednimas por debajo de  -4 \u00c2\u00bac, los resultados obtenidos, aunque fueron mejores, no mostraron diferencias significativas respecto a la zona sin tratar. Se comprob\u00f3 que la persistencia de estos productos sobre las plantas no era mayor de 4 d\u00edas, alcanzando su m\u00e1xima efectividad entre las 8 y 48 h despu\u00e9s de su aplicaci\u00f3n. La translocaci\u00f3n de estos crioprotectores era m\u00ednima, por lo que la zona a defender deb\u00eda que<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Defensa de heladas primaverales en especies frutales y hort\u00edcolas mediante el uso de crioprotectores<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Defensa de heladas primaverales en especies frutales y hort\u00edcolas mediante el uso de crioprotectores <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Rub\u00e9n Moratiel Yugueros <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 09\/10\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> Dur\u00e1n Altisent  Jos\u00e9 M.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  De la plaza  per\u00e9z saturnino <\/li>\n<li> Mourao de melo abreu Jos\u00e9 paulo (vocal)<\/li>\n<li>Fernando Gil-albert velarde (vocal)<\/li>\n<li>Mar\u00eda  virtudes Andres escudero (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Rub\u00e9n Moratiel Yugueros En la actualidad, en climas templados el factor m\u00e1s importante de p\u00e9rdidas sobre plantaciones [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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