Growing degree-days for the 'Niagara Rosada' grapevine pruned in different seasons


Autoria(s): Scarpare, Fábio Vale; Scarpare Filho, João Alexio; Rodrigues, Alessandro; Reichardt, Klaus; Angelocci, Luiz Roberto
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

07/11/2013

07/11/2013

2012

Resumo

Plant growth and development are proportional to biological time, or the thermal time of the species, which can be defined as the integral of the temperature over time between the lower and upper temperature developmental thresholds. The objective of this study was to investigate the efficiency of the growing degree-day (GDD) approach for vines of the 'Niagara Rosada' cultivar pruned in winter and summer seasons, and physiological phases (mobilisation and reserve accumulation) in a humid subtropical region. The experiment was carried out on 13-year-old plants in Piracicaba, So Paulo State-Brazil, evaluating 24 production cycles, 12 from the winter pruning, and 12 from the summer pruning. The statistical design was comprised of randomised blocks, using the pruning dates as treatment: 20 July, 4 August, 19 August, and 3 September (winter); 1 February, 15 February, 2 March, and 16 March (summer). Comparison of the mean values of GDD among pruning dates was evaluated by the Tukey test, and comparison between pruning seasons was made by the F test for orthogonal contrasts, both at the 5% probability level. The results showed good agreement between the values of GDD required to complete the cycle from the winter pruning until harvest when compared with other studies performed with the same cultivar grown in the Southern and Southeastern regions of Brazil. However, there was a consistent statistical difference between GDD computed for winter and summer pruning, which allowed us to conclude that this bio-meteorological index is not sufficient to distinguish vines pruned in different seasons and physiological phases applied in humid subtropical climates.

Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

Identificador

INTERNATIONAL JOURNAL OF BIOMETEOROLOGY, NEW YORK, v. 56, n. 5, pp. 823-830, SEP, 2012

0020-7128

http://www.producao.usp.br/handle/BDPI/43224

10.1007/s00484-011-0484-8

http://dx.doi.org/10.1007/s00484-011-0484-8

Idioma(s)

eng

Publicador

SPRINGER

NEW YORK

Relação

INTERNATIONAL JOURNAL OF BIOMETEOROLOGY

Direitos

closedAccess

Copyright SPRINGER

Palavras-Chave #THERMAL HEAT REQUIREMENT #GRAPE #PHENOLOGY #SHOOT GROWTH RATE #WINTER PRUNING #SUMMER PRUNING #BIOPHYSICS #ENVIRONMENTAL SCIENCES #METEOROLOGY & ATMOSPHERIC SCIENCES #PHYSIOLOGY
Tipo

article

original article

publishedVersion