[Early defoliation of grapevine [Vitis vinifera L.; Emilia-Romagna]]

acide malique acide tartrique acidez acidity acidità acido malico acido tartarico anthocyane anthocyanins antocianinas antocianine azucares brotes crop yield date de traitement defogliazione defoliation emilia romagna epoca di trattamento fecha de tratamiento field experimentation fioritura floraison flowering fructification fruiting fruttificazione germogli leaf area malic acid peso ph poids polifenoles polifenoli polyphenol polyphenols pot experimentation pousse raisin de cuve rendement des cultures rendimiento de cultivos shoots sperimentazione in campo sperimentazione in vaso sucres sugars superficie foliar surface foliaire tartaric acid treatment date uvas para vino uve da vino variedades varieties varietà vitis vinifera weight wine grapes zuccheri