1,721,160 research outputs found
L'orticoltura biologica: evoluzione, principi ispiratori e qualità dei prodotti
No full textThis paper is aimed to discuss the organic vegetable production and at the same time to highlight and make an overview of the critical points of this agricultural system in Italy. The organic surface has been increasing in Italy in the past decades but rea- ched a plateau around the year 2000. In the past 2 years, the land destined to organic cultivation has sta- bilized around 1.0 million hectares and only 1% of this land is used to produce vegetable crops. Although Italy is still the first European producer of organic vegetables, in the last 2 years the cultivated area showed a reduction by 20%. There are several direc- ting principles that characterize organic farming. They include biodiversity, integration, sustainability, natural plant nutrition, natural pest management and integrity. Each of those principles needs to be understood, respected and well applied in order to perform a real organic farming and not only a “substitution agricultu- re” based merely on the replacement of agrochemi- cals by organic compounds. One of the most impor- tant reason aiming consumers to buy organic pro- ducts is the perception that organic food has better nutritional and quality traits. The analysis of the scien- tific literature available showed that only few resear- ches were carried out following rigorous experimental criteria. In most of the experiments, only the nitrate content resulted clearly reduced by using organic pro- cedures. Vague and sometimes contradictory results has been reported on nutrients and vitamins content. Several authors suggest that more researches are needed to asses the real effects of organic techniques in terms of quality of the product, in order to get more scientific data on this topic which at moment seems to be more discussed than effectively studied
Sistemi fuori suolo semplificati per coltivazioni urbane
No full textLe attività di agricoltura urbana rappresentano un valido strumento per l’apprendimento
permanente degli adulti, e in particolare per favorire l’acquisizione di competenze
chiave fondamentali per chiunque viva in una società fondata sulla conoscenza.
Questi materiali sono stati redatti nell’ambito del progetto europeo Hortis – Horticulture
in towns for inclusion and socialization (526476-LLP-1-2012-1-ITGRUNDTVIG-
GMP), integrando le competenze specifiche e le diverse esperienze
nell’ambito dell’orticoltura urbana riscontrate nelle città partner: Bologna (Italia),
Berlino (Germania), Budapest (Ungheria) e Cartagena (Spagna).
Ciascun partner ha contribuito con le proprie conoscenze in un ambito specifico realizzando
un e-book che è successivamente evoluto attraverso un approccio empirico di
scambio di competenze e revisione condivisa, al fine di ottenere una visione comune e
trasversale dell’orticoltura urbana.
Il risultato di questo processo partecipativo sono cinque volumi ben documentati che
affrontano diversi argomenti quali l’Orticoltura Comunitaria Sostenibile in Città
(e-book 1), la Gestione Sostenibile dell’Orto Urbano (e-book 2), i Sistemi di Coltivazione
nell’Orto Urbano (e-book 3), i Sistemi Fuorisuolo Semplificati per la Produzione
di Ortaggi in Città (e-book 4) e l’Agricoltura a Km Zero, manuale per il
consumatore urbano (e-book 5).
Speriamo che questi materiali possano aprirvi nuovi orizzonti ed ispirarvi nuovi
modi per rendere la vostra vita e la vostra città più verdi
Determination of SPAD Threshold Values in order to optimise the nitrogen supply in processing tomato
No full text
Are optical tools suitable to manage phosphate and potassium fertigation in tomato crops?
No full textPrimi risultati sulla qualità di orticole allevate con tecniche biologiche e convenzionali: l'attività antiossidasica
No full textEffect of different osmopriming treatment on seed germination of two types of radicchio (Cichorium intybus L. var. silvestre)
No full textTo improve germination of two types of radicchio (“Rosso di Chioggia”, RCh,
and “Bianco di Chioggia”, WCh) various pre-sowing treatments were evaluated. A non-soaked control was compared with seeds primed for 2, 4, 6, 8 hours in plain water (hydropriming) or in solutions containing the following concentration of polyethylene glycol (PEG 6000) and potassium nitrate (KNO3): a) PEG at -0.5, -0.9 and -1.7 MPa; b) KNO3 at -0.12, -0.24 and -0.52 MPa. After soaking, seeds were rinsed and placed in petri-dishes at 20 or 27°C germination temperature. Pre-sowing treatments affected the germination percentage more than the mean time of germination, and the effects were more evident in RCh and when 20°C germination temperature was applied. Generally, the higher germination percentage was obtained with longer hydropriming (6-8 hrs) and with short treatment (2 hrs) with osmotic compounds. KNO3 proved to be less effective than PEG which gave, on average, the best results at -0.5 and -0.9 MPa water potential
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