Row orientation effects on Syrah grapevine performance during winter growing season

Abstract

The sunlight and heating effects on leaves and grapes are directly influenced by row orientation in vineyards. Row orientation studies have not been addressed under double pruning management, a technique used to transfer the wine grape harvest from wet summer to dry winter season in Brazilian Southeast. Effects of grapevine row orientation (north/south-NS and east/west-EW) of vertically trellised and shoot positioned Vitis vinifera L. Syrah grafted onto 1103 Paulsen were investigated in the South of Minas Gerais State. The vegetative vigor was increased in NS oriented vines, probably due to high photosynthesis as suggested by the highest leaf starch accumulation. The leaf and stem water potential were slight affected by row orientation. NS orientation increased the cluster weight, but cluster number and yield per vine were not affected by treatments. Berries from NS oriented vines also showed the highest values of anthocyanins and total phenols. Under NS orientation there was a reduction on tartaric acid and soluble sugar in berries probably diluted by increased cluster weight. This study showed that vineyard under NS orientation improved grapevine vigor and promoted better phenolic maturity in wine grapes harvested during the winter season than EW orientation.

Distinctive phenolic accumulation response to temperature-induced by row orientation of two field-grown Vitis vinifera cultivars

“…Total anthocyanin and phenols of Cabernet Gernischt were highest in NS-E; greater than 70.6 and 32.2%, compared with the lowest, NS-W (Figure 3a, b). This result is consistent with most previous research (Campos et al, 2017;Gutierrez-Gamboa et al, 2021;Souza et al, 2019). High temperatures are known to thermally decouple anthocyanins (Sadras and Moran, 2012), which explains the low anthocyanins and phenols content of NS-W and EW-N. Low anthocyanin concentration would decline the redness and increase the yellowness of the wine (Wang et al, 2021).…”

“…Therefore, the reason for the higher reducing sugar content in the NS row orientation of Cabernet Sauvignon may be strong photosynthesis. Furthermore, another study found that, in Cabernet Sauvignon, sugar content is probably diluted by increased cluster weight under EW orientation (Souza et al. , 2019).…”

Row orientation effects on chemical composition and aromatic profile of Syrah winter wines

“…The influence of row orientation on alcoholic strength is not clear. Chorti et al (2018) and Hunter & Volschenk (2018) did not find a significant difference between the alcohol content in NS and EW row orientations, although Jogaiah et al (2012) and Souza et al (2019) observed a slight increase in the soluble solids content in berries from an EW row orientation. Jogaiah et al (2012) also found a higher potassium content in the must from an NS row, which could explain higher pH and ashes content in wines from NS-oriented vines.…”

“…Dn the other hand, EW-oriented rows can capture the largest portion of total radiation in the cluster zone from soil-reflected radiation, and the leaves of EW-oriented vines can also display higher CD 2 assimilation, stomatal conductance and transpiration than those with a NW-SE orientation, as demonstrated by Grifoni et al (2008) and Hunter et al (2016). However, the reduced light interception in an EW row orientation may also have a negative impact on growth and yield compared to an NS direction (Chorti et al, 2018;Souza et al, 2019). Hunter & Volschenk (2018) observed that some wine sensory descriptors had lower scores for the EW row orientation in comparison with NS wines.…”

Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China

“…Dehydration is an important part of aging, and a suitable row direction and plant spacing can result in a good canopy structure, improve canopy microenvironment, and increase the yield for maize [19]. Numerous studies reported that crop yield is higher and crop quality is better in the north-south row direction than those in the east-west row direction [20,21]. Many studies, particularly those about the influence of plant spacing, reported that a suitable plant spacing can increase yield [22].…”