Leaf water potential, nutritional status and must composition in grapes 'Pinot Nero' with and without irrigation

Ciotta, Marlise Nara; Ceretta, Carlos Alberto; Tagliavini, Massimo; Zanotelli, Damiano; Moser, D. F.; Nava, Gilberto; Porro, D.; Brunetto, Gustavo

doi:10.1590/0103-8478cr20141225

Cited by 1 publication

(1 citation statement)

References 5 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vines with fertigation applied by subsurface drip irrigation (SDI) showed higher hydric comfort compared to the other treatments evaluated, but lower element concentration in must, despite fertigation (Tables 1 and 6). This last aspect agrees with Ciotta et al (2015), who did not obtain significant differences between treatments in berry composition. The K content in cv.…”

Section: Relationships Between Soil and Plant Measurementssupporting

confidence: 91%

Impact of water stress and nutrition on Vitis vinifera cv. ‘Albariño’: Soil-plant water relationships, cumulative effects and productivity

et al. 2016

View full text Add to dashboard Cite

The objective of the present study is to apply different systems of fertigation (rainfed, R; surface drip irrigation, DI, and subsurface drip irrigation, SDI) in Vitis vinifera (L.) cv. ‘Albariño’ to evaluate the cumulative effect of water stress (water stress integral) on yield parameters and to establish the relationship between indices and production. The study was conducted over four years (2010-2013) in a commercial vineyard (Galicia, NW Spain). The volumetric soil water content (θ) (with TDR) and predawn (ψp), midday (ψm) and stem (ψstem) leaf-water potential were determined with a water activity meter during the growing stages (flowering-harvest) from 2010-2013. The number of clusters, their weight and yield/vine were determined at harvest. Must composition was studied to evaluate nutrition treatments. Ψp is presented as the best indicator of the water status of the plant, and the sole use of θ is not recommended as a reference. The soil-plant water status variables were strongly correlated, especially between foliar variables (0.91<R2<0.98), with θ presenting the lowest reliability (0.28<R2<0.81). SDI was the treatment with the highest hydric comfort and greater yield/vine (6.1 kg) and weight per cluster (95.0 g), but lower elements concentration in must. The water stress integral showed that the veraison and harvest stages were very sensitive to water stress in vines. Linear relationships were established between Sψp and W (R2=0.65) and Y (R2=0.56) at veraison. The water stress integral is presented as a useful working tool for vine growers because it allows the prediction of future yield at early phenological states.

show abstract

Section: Relationships Between Soil and Plant Measurementssupporting

confidence: 91%