The Variation in Nutrient Composition and yield of Grape Genotypes Grown in MUARIK.

Abstract

Grapes (Vitis vinifera L.) are the common grapevine from vitaceae family and a native to the Mediterranean region, central Europe and southwestern Asia (Gbejewoh et al., 2021). The study was about the variation in nutrient composition and yield of grape genotypes grown in MAURIK, soil nutrient and plant nutrient composition were assessed using one way anova and correlation using genestat 14th edition. The plant analysis included data from leaves (L),

flowers (F) and fruits (Y); it was observed that there was a strong significant difference in the nutrient composition of the genotype leaves. (Figure 4.1), total nitrogen in the leaves ranged from 2.65 to 2.06 %, the nitrogen in leaves was high in Genotype B (2.65%) and the least was from leaves of genotype D (2.06%), leaves of genotype A had nutrient content of 2.50% according to Table 4, Phosphorus in leaves ranged from (0.32 to 0.75)% with leaves of the Genotype B having the highest phosphorus content of 0.75% and the leaves of genotype D with lowest phosphorus 0.32%, potassium in the leaves ranged from (1.80-1.17)% and the order of decreasing nutrient content was B, A, C D with leaves of B showing the highest potassium 1.80 % and leaves of genotype D with lowest potassium content of 1.17 %. In the flowers of grape genotypes, the nitrogen content ranged from (1.05 to 0.53) % with the flower of genotype B genotype showing the highest nutrient content of 1.05% and flowers of genotype D had 0.53% of nitrogen content. The plant analysis data revealed that genotypes play a significant role in determining nutrient composition in leaves, flowers, and fruits. It was observed that nutrient composition in leaves correlated with flower and fruit nutrient composition implying nutrient allocation during growth and development. Genotype B showed higher nutrient content, compared to other genotypes as reflected in the yield data, the study highlighted the importance of grape varieties in determining yield, growth parameters, and nutrient composition. Genotype B stands out as the most productive, while Genotype D is identified as a low-performing variety.

The study provides valuable insights into the complex interplay between soil properties, grape genotypes, plant nutrient uptake and composition and yield. The positive correlations observed indicate that maintaining ensuring plant nutrition is crucial for achieving higher grape yields. Additionally, the study emphasizes the significance of grape variety selection in vineyard productivity. Understanding the genetic makeup of genotype D will contribute to breeding programs aimed at developing more robust and high-yielding grape genotypes.