The role of rootstock in the potassium (K) content of Croatina grapevines was investigated in a replicated rootstock trial on a sandy clay loam soil in Oltrepo Pavese, Italy. Each rootstock was significatively different in terms of K absorption ability. The effect of the seasonal weather on the level of must K was strictly linked to the rainfall during the vegetative period. The highest K levels were induced by rootstocks 44–53 M and SO4, while the lowest by rootstocks 140 Ru, 420A, and 1202C. The rootstock effect on must K levels was particularly marked in the driest year when on average the K levels were the lowest. Potassium in musts and leaves at veraison was strictly correlated to must pH. The results indicated a different ability for K absorption, induced by rootstock, which resulted either in high leaf or musts K levels. A considerable influence due to the seasonal weather course was evident too. The results provide evidence that vine K status can be controlled to some extent with proper selection of rootstock, because of the large genetic diversity that can be exploited by rootstocks.
Potassium content of grapevine during the vegetative period : the role of the rootstock / L. Brancadoro, L.V.A. Reina, A. Scienza. - In: JOURNAL OF PLANT NUTRITION. - ISSN 0190-4167. - 17:12(1994), pp. 2165-2175.
|Titolo:||Potassium content of grapevine during the vegetative period : the role of the rootstock|
BRANCADORO, LUCIO (Corresponding)
SCIENZA, ATTILIO (Ultimo)
|Parole Chiave:||nitrogen; minerals; juice|
|Settore Scientifico Disciplinare:||Settore AGR/03 - Arboricoltura Generale e Coltivazioni Arboree|
|Data di pubblicazione:||1994|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1080/01904169409364872|
|Appare nelle tipologie:||01 - Articolo su periodico|
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