Articles
EVALUATION OF THE NUTRITIONAL CONDITION OF ITÁLIA GRAPEVINES (PIROVANO 65) AT THREE DIFFERENT DEVELOPMENT PHASES IN THE REGION OF JUNDIAÍ, BRAZIL, USING THE DRIS METHOD
Article number
640_7
Pages
69 – 81
Language
English
Abstract
This work aimed to evaluate the nutritional condition of Itália (Pirovano 65) grapevines growing in Jundiaí, State of São Paulo, Brazil, using the Diagnosis and Recommendation Integrated System (DRIS) method.
The nutritional survey was carried out in 19 vineyards by collecting leaf samples at three different development phases: bloom; between pea and half-berry; and veraison.
Yield was also considered in the evaluation.
DRIS was useful and it allowed reliable information on sampling tissue, nutritional disorders and reference indices for nutritional balance.
Leaf blades were better than petioles for tissue sampling, since it showed better nutritional balance indices.
The method confirmed that bloom was the best stage for leaf sampling.
Five vineyards were considered the most nutritionally balanced.
They had above average yields of 20 t/ha and nutritional balance indices (NBI) of 11. The vineyards sampled were considered suitable for the calculation of means.
DRIS also reflected the local sampling conditions and variability was found among the vineyards with respect to degree of nutrient limitations and productivity.
The nutritional survey was carried out in 19 vineyards by collecting leaf samples at three different development phases: bloom; between pea and half-berry; and veraison.
Yield was also considered in the evaluation.
DRIS was useful and it allowed reliable information on sampling tissue, nutritional disorders and reference indices for nutritional balance.
Leaf blades were better than petioles for tissue sampling, since it showed better nutritional balance indices.
The method confirmed that bloom was the best stage for leaf sampling.
Five vineyards were considered the most nutritionally balanced.
They had above average yields of 20 t/ha and nutritional balance indices (NBI) of 11. The vineyards sampled were considered suitable for the calculation of means.
DRIS also reflected the local sampling conditions and variability was found among the vineyards with respect to degree of nutrient limitations and productivity.
Authors
M. Monteiro Terra, F. Costa, W. Rodrigues dos Santos, E.J. Paioli Pires
Keywords
nutrition, DRIS, grapevines, Itália (Pirovano 65)
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