Search results for " nursery."
showing 9 items of 19 documents
Alternative nursery propagation for vineyards establishment
2016
Dead vines are often a problem present in many vineyards and are due to physiological or pathological causes whereby the vines need to be replaced. The aim of the trial was to create in the nursery plant material of four cultivars in order to easily replace the dead vines in the vineyards but also to anticipate the first harvest and to improve the vineyard uniformity and synchronize the vineyard management practices during the first two years of plantation. During the first year in the nursery, the effect of plant density on the percentage of success and vegetative growth was evaluated. During the second year, in the open field and only for one cultivar, the vegetative and reproductive para…
Phytophthora Root and Collar Rot of Paulownia, a New Disease for Europe
2021
Paulownia species are fast growing trees native to China, which are being grown in managed plantings in several European countries for the production of wood and biomasses. In 2018, wilting, stunting, leaf yellowing, and collapse, as a consequence of root and crown rot, were observed in around 40% of trees of a 2-year-old planting of Paulownia elongata × P. fortunei in Calabria (Southern Italy). Two species of Phytophthora were consistently recovered from roots, basal stem bark, and rhizosphere soil of symptomatic trees and were identified as Ph. nicotianae and Ph. palmivora on the basis of both morphological characteristics and phylogenetic analysis of rDNA ITS sequences. Koch’s postulates…
Propagation techniques and nursery management for the production of certified peach plants in Europe
2022
The propagation of fruit trees, particularly peaches, nectarines and canning clingstone, has reached highly specialized levels since the 1960s. Over the years, the classic seed rootstocks have been replaced by numerous rootstocks produced in vitro, expanding the range of technical solutions for the different soil and climatic growing conditions of several areas. Thanks to the new genotypes from international breeding programs, it was thus possible to renew the cultivated varietal platform several times. Propagation techniques have also undergone an evolution, adopting solutions aimed at shortening nurseries’ production cycles by using June budding or micrografting. Finally, there are differ…
Verso un curricolo 0-6: continuità, discontinuità e prospettive possibili a partire da un percorso di ricerca-azione nella città di Palermo
2021
A partire da una ricerca sulla costruzione di un possibile curricolo zero-sei, condotta con un gruppo di insegnanti di scuola dell’infanzia statale ed un gruppo di educatrici di un nido comunale operanti nello stesso territorio (un quartiere del centro storico di Palermo), l’articolo mira a mettere in luce e a problematizzare ambiti di continuità e di discontinuità tra i due servizi educativi collegandoli alla storia e alla cultura organizzativa dei servizi stessi. Intende, inoltre, riflettere su possibili proposte di cambiamento organizzativo nella direzione della continuità, attraverso l’adozione di una metodologia partecipativa centrata sulla autovalutazione riflessiva, sulla progettazio…
Educación compensatoria : efectos recientes de un estudio clásico (High-Scope)
2014
Este artículo analiza dos estudios que prueban la tesis de que la educación de los desfavorecidos sociales en la edad temprana -3 y 4 años- merece la pena a corto y largo plazo. Para ello se analizan dos estudios preescolares complementarios –Perry y Curriculum -, de la Fundación High/Scope en los 60, evaluados en diversos momentos intermedios, el primero hasta alcanzar los 40 años y el segundo 23. Se describen los estudios y programas educativos, se analizan cuestiones metodológicas ligadas al seguimiento (muestra, validez, variables), se muestran los hallazgos, los tempranos específicamente escolares y otros de naturaleza distinta en la edad adulta. Finalmente se discute la modificabilida…
Corpo e linguaggio : le interazioni comunicative e sociali nei primi anni di vita
2023
I bambini sono attivi e propositivi nella relazione con l’adulto e con il mondo che li circonda fin dai primi giorni di vita, come sostenuto dalla psicoanalisi, dall’infant research e dalle ricerche neuroscientifiche. All’interno di una tale cornice, in questo articolo si focalizza l’attenzione sulla comunicazione e sul ruolo del corpo e della gestualità nella relazione intersoggettiva, adottando una “prospettiva alla seconda persona” e mostrando come la competenza comunicativa preceda l’acquisizione del linguaggio verbale e sia legata non solo a ragioni biologiche ma anche alla ricchezza dello scambio, alla capacità di presenza e di ascolto dell’adulto e alla motivazione del bambino a cond…
Survival, Growth and Mycorrhization of Containerised Pinus sylvestris and Picea abies Seedlings of Different Provenances Outplanted in a Forest Clear…
2017
Abstract We studied field performance of containerised Pinus sylvestris and Picea abies seedlings of different provenances. Shoot height, needle chemical composition, root collar diameter, root mycorrhization and mycorrhizal species composition were evaluated after four growing seasons following outplanting. The results showed that in general spruce had better survival than pine. Ectomycorrhizas on spruce were dominated by Wilcoxina, Amphinema and Tylospora, while on pine — by Suillus and Thelephora species. Spruce and pine showing best growth rates were colonised by ectomycorrhizal fungus Amphinema sp. In conclusion, the results demonstrated that forest nursery practices as well as provena…
Una metodologia innovativa per le famiglie al nido. Il Digital Storytelling tra competenze riflessive e narrative
2022
La pandemia da Covid-19 ha messo in discussione le modalità comunicative e inter-relazionali. Durante il periodo interessato, educatori ed educatrici si sono interrogati su come dialogare con i bambini e su come alimentare la relazione a distanza. La condivisione sociale del compito educativo, il sostegno e l’accompagnamento ai genitori è risultato terreno fertile per la promozione della crescita globale della persona. La relazione nido-famiglia e l’attività di narrazione – declinata secondo la tipologia del Digital Storytelling – costituiscono gli assi portati della ricerca qui descritta, condotta a distanza con 20 coppie di genitori di 20 bambini frequentanti un asilo nido comunale della …
Effects of NAA and Ecklonia maxima Extracts on Lettuce and Tomato Transplant Production
2022
Ecklonia maxima and the commercial biostimulants produced from it contain various plant growth regulators that are responsible for the growth stimulation recorded in many crops. Auxins are one of the major plant growth regulators contained in E. maxima extracts. The aim of this research was to evaluate the growth-promoting effect of a seaweed extract from E. maxima on lettuce and tomato transplant production under nursery conditions, and to compare the effect of this extract with an equal concentration of synthetic auxin. Two doses of natural or synthetic exogenous auxins (50 or 100 μg L−1) were supplied to the substrate through the irrigation water with an ebb and flow system, 4, …