Sufficiency ranges (sr) and deviation from optimum percentage (dop) references for leaf blade and petiole analysis in ‘Red Grenache’ grapevines

Abstract

<p class="BodyTextIndent" style="text-align: justify;"><strong>Aim</strong>: To obtain specific references for the nutritional diagnosis of ten essential nutrients for leaf blade and petiole of ‘red Grenache’ (<em>Vitis vinifera</em> L.).</p><p class="BodyTextIndent" style="text-align: justify;"><strong>Methods and results</strong>: Leaf blades and petioles from 36 vineyards of ‘red Grenache’ (<em>Vitis vinifera</em> L.) grafted on Richter 110 were collected and analyzed at flowering and veraison between 1992 and 2008. Using the compiled data bank, nutritional references for ten elements (N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B were calculated. Optimal values were those around the central data (µ ± 0.25σ), while excessive and deficient values were those beyond the tails of the distribution (µ ± 0.84σ). Percentile calculation was performed when transformations to normal distributions became unlikely.</p><p class="BodyTextIndent" style="text-align: justify;"><strong>Conclusion</strong>: References for Sufficiency Ranges (SR) and Deviation from Optimum Percentage (DOP) methods were obtained for those ten nutrients studied.</p><strong>Significance and impact of the study</strong>: The proposed ‘red Grenache’ references for leaf blade and petiole contribute to the improvement of the accuracy of ‘red Grenache’ grapevine nutrient diagnosis based on tissue analysis. These references are a guide to assess the nutritional status of ‘red Grenache’ grapevine around the world in general and, with higher accuracy, for the Rioja region and areas with similar vineyard conditions.

Influence of supplementation of vineyard soil with organic substances on nutritional status, yield and quality of ‘Black Magic’ grape (<i>Vitis vinifera L.</i>) and soil microbiological and biochemical characteristics

“…Enzyme activity was also affected by the treatments. In terms of the effect of the organic materials used in this study on dehydrogenase enzyme activity in soils, the application of P+(PR+FM) in 2017 and of Jones et al (1991) and Benito et al (2015). PR+FM in 2018 yielded the highest figures.…”

“…When comparing the values obtained from all treatments with the limits for the full flowering period, (according to Jones et al (1991) and Benito et al (2015)), the amounts were found to be high for nitrogen, optimal-high for phosphorus, optimal for calcium and Mg and low for potassium (Table 5). Fe and Mn were evaluated as being optimal and zinc values as being low (Table 6).…”

“…In order to determine how the different treatments affected plant nutrition, ten leaf samples from each treatment were taken from opposite the clusters in full bloom and at veraison (Table 2) (Winkler et al, 1974;Weaver, 1976;Bhangoo et al, 1988;Tangolar and Ergenoğlu, 1989;Çelik et al, 1998;Çelik, 2011;Benito et al, 2015). In the laboratory, the leaf samples were washed twice with tap water and then twice with distilled water.…”

“…y : Significant difference (p ≤ 0.05) was found between the means indicated by different letters in the same column. * = p ≤ 0.05, ** = p ≤ 0.01, *** = p ≤ 0.001, NS = non significant Z : SR, Sufficiency ranges have been adopted from Jones et al (1991) and Benito et al (2015).…”

“…* = p ≤ 0.05, ** = p ≤ 0.01, *** = p ≤ 0.001. Z : SR = sufficiency ranges have been adopted from Jones et al (1991) and Benito et al (2015).…”