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The following research took place during the 2018 − ‘19 season in ‘Italia' table grape vineyard in Apulia. Four treatments were compared: no fertilized (T), organic amendment fertilized (B) at rate of 5.0 ton/hectare, equivalent at the rate of 100 Kg N ha−1, 75 Kg P2O5 ha−1 and 75 Kg K202 ha−1; mineral fertilized (M) at the same rate of N, P2O5 and K2O of organic fertilized vines and finally a cover crops treatment with a mixture of vetch, pea and lentil (S). Leaf gas exchange during summer season shown significant differences in term of net CO2 assimilation, stomatal conductance, transpiration onto organic fertilized vines respect to control vines. Vines fertilized with organic amendment shown a better water status during warmest summer days since organic compounds improve the soil-water holding capacity. Compared to unfertilized vines, vines fertilized with organic amendment have shown a significant increase in yield per vine (+ 32%) in relation to the highest cluster weight and the highest sugar content respect to mineral fertilized vines. Our results indicates that application of an high level of soil organic amendment on ‘Italia' table grape vines increase grapevines yield, berry solid soluble solid and have improved soil properties, contrasting summer drought effect.

The drastic reduction of agrobiodiversity has induced all countries in the world to implement numerous initiatives to safeguard genetic resources. The biodiversity issue is also one of the priority objectives of the global action plan for the conservation and sustainable use of FAO's cytogenetic resources and of the International Treaty on Plant Genetic Resources for Food and Agriculture. In Italy, the primary competence on genetic resources of agricultural interest is entrusted to the Ministry of Agricultural. In 2004, the Ministry entrusted the coordination of the RGV/FAO Project to CREA. The main objectives of the project, in addition to the inventory of accessions present in the collections of the structures involved, are their morphological, agronomic and molecular characterization and the productive enhancement with particular reference to the autochthonous varieties at risk of extinction. The project in question includes the activities of recovery and characterization of the viticultural germplasm illustrated in the present work. The 12 vines described here, like others yet to be rediscovered, are strongly linked to small winegrowers and indissolubly characterial of a territory in Campania Region that from the socio-cultural (rather fragmented agricultural system) and environmental orography point of view, like the national one, is very diversified.