Leaf mineral composition and noni fruit production under vegetal mulching and potassium fertilization

Melo, Edinete Nunes de; Souto, Antônio Gustavo de Luna; Cavalcante, Lourival Ferreira; Diniz, Belísia Lúcia Moreira Toscano; Cavalcante, Ítalo Herbert Lucena; Filho, Roberto Monteiro Ferreira; Silva, Maria Rosimere Miguel da; Oliveira, Carlos Jardel Andrade; Melo, Paulo Alexandre Fernandes Rodrigues de

doi:10.1016/j.scienta.2021.109990

Cited by 3 publications

(1 citation statement)

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“…Paluma, the highest levels of macro (except K) and micronutrients were found in the plants subjected to different intensities of pruning and thinning in the second harvest (Figure 3). The probable response to the non-significance of K under more intense pruning and thinning is the reduction of aerial vegetative material, reducing the leaf area, which causes damage to plant metabolism, such as the synthesis of lipids, carbohydrates, and proteins, in addition to the fact that this nutrient can regulate stomatal conductance, which reduces the loss of water and optimizes photosynthetic processes in plants [34].…”

Section: Characteristicmentioning

confidence: 99%

Pruning and Fruit Thinning of Psidium guajava cv. Paluma under a Seasonal Tropical Climate

Santos,

Dalzot,

Pereira

et al. 2023

Agriculture

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Maintaining the plant architecture of Psidium guajava L. (guava tree) is essential for enhancing capture and distribution in the plant, directly affecting the fruit quality. The lifespan of the harvest period can be extended by proper pruning. Both timeliness and proper pruning play crucial roles in achieving high-quality fruit production and in maintaining a consistent fruit size while stimulating ascorbic acid levels, sugar content, total soluble solids (TSS), and titratable acidity. From this perspective, this study aimed to characterize the influence of different intensities of fruit pruning and thinning on guava trees grown under a seasonal tropical climate in two growing seasons in Currais, Piauí, Brazil. The experiment was set up in a randomized block design with a 3 × 3 × 2 factorial arrangement corresponding to short, medium, and long pruning intensities and 0%, 10%, and 20% thinning intensities during the two growth seasons, respectively. An analysis was performed to discriminate the treatment groups according to the physicochemical variables of the guava tree cv. Paluma and canonical discriminant analysis. There was significant variation in the SS, titratable acidity, ascorbic acid, and pH contents. Cluster analysis of all treatments allowed division into five different groups for the two pruning times. Canonical discriminant analysis showed that the first two canonical variables explained 91% of the total variance. The fruits of the second harvest exhibited a lower level of acidity, higher levels of soluble solids, and higher levels of ascorbic acid contents. In addition, these fruits also obtained better nutrient contents. Short pruning with up to 20% thinning, medium pruning with up to 10%, and long pruning without thinning favored better levels of macronutrients and micronutrients and, consequently, better fruit quality. Medium or long pruning with up to 20% thinning resulted in higher average fruit weights and nutrient contents (especially of Fe and Cu), lower acidity, and higher ascorbic acid contents. Thus, in general, the importance of production pruning in guava plants is evidenced and thinning of 20% is recommended to improve the fruit quality.

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Section: Characteristicmentioning

confidence: 99%