DRIS Norms and Critical Leaf Nutrient Levels for Niagara Rosada Grape in Jundiaí, Brazil

Preliminary Diagnosis and Recommendation Integrated System norms and critical leaf nutrient levels for 'Niagara Rosada' grape grafted on rootstock 'IAC 766' are presented. The norms were established from a data bank of leaf nutrient concentration and fruit yield with 116 records from fertilization experiments and a field survey comprising four crop cycles. The data were divided into high-yielding and low-yielding subpopulations, and the relationship between the nutrient balance index and fruit yield was highly significant (R² = 0.48).

Use Cases

• Establishing nutrient sufficiency standards for grapevines based on leaf nutrient concentration data.
• Developing fertilization recommendations using DRIS indices derived from N, P, K, Ca, and Mg levels.
• Analyzing the relationship between plant nutritional status and vineyard productivity based on yield data.
• Calibrating crop models for 'Niagara Rosada' grapes using region-specific critical nutrient levels.

Strengths

• Data bank contains 116 records of leaf nutrient concentration and fruit yield.
• Establishes specific critical leaf nutrient levels for N (38.0 g/kg), P (3.0 g/kg), K (11.4 g/kg), Ca (13.7 g/kg), and Mg (3.5 g/kg).
• Analysis shows a statistically significant relationship between nutrient balance and yield (R² = 0.48, p<0.0001).
• Data sourced from both controlled fertilization experiments and a field survey across four crop cycles.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to the Jundiaí region of São Paulo, Brazil.

Provenance

Source

Luiz Antônio Junqueira Teixeira

Collection Method

Data gathered from fertilization experiments and a field survey.

Time Range

Covers four crop cycles (specific years unknown).

Geography

Jundiaí region, State of São Paulo, Brazil.