DYNAMICS OF MICRONUTRIENT ACCUMULATION AND EXPORT IN THE "BRS VITÓRIA" VINEYARD IN THE SÃO FRANCISCO VALLEY
DOI:
https://doi.org/10.32404/rean.v13i1.9641Keywords:
Accumulation of micronutrients, Export of micronutrients, Mineral nutritionAbstract
Fruit growing in the São Francisco Valley stands out in Brazilian agriculture, especially for the production of grapevines, such as the cultivar ‘BRS Vitória’. The objective of this study was to evaluate dry and fresh matter accumulation and to determine micronutrient accumulation rate for the grapevine variety ‘BRS Vitória’. The experiment was carried out in Petrolina, PE, Brazil, in a randomized block design, with eight evaluation periods and four replicates. Plant collections were carried out at 15, 30, 45, 60, 75, 90, 105 and 120 days after pruning (DAP). Accumulations of Fe, Zn, Mn and Cu, dry matter and fresh matter, in branches, leaves, fruits and total throughout the cycle were analyzed. The results showed that dry matter accumulation was significant between 45 and 90 DAP, especially in fruits. Micro-nutrients showed an increasing accumulation up to 90 DAP, with iron being the most required, followed by zinc, manganese and copper. Nutrient export was highest for iron, highlighting the need to replace this nutrient in the soil.
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