Zn and K influence in fruit sizes of Valencia orange

Abstract

In orange commercial farms, Zn deficiencies symptoms and small fruits were observed in Corrientes, Argentine. During four years (1995 to 1998), Valencia orange (Citrus sinensis Osb.) on Rough lemon (C. jambhiri Lush.) rootstock, implanted in 1974 in sandy soil, where six treatments were tested. Treatments varied from 1 to 3 Kg KCl.tree-1.year-1 (applied in April and December) with and without Zineb 80, 0,35%. year-1, 20 L. tree-1 (13,3 g Zn.tree-1 applied in December). The experimental design was a randomized complete block with four replications, with a single tree and borders in the experimental plot. Foliar sample were taken every year in Autumn and Summer, foliar concentrations of Zn and K were determined by atomic spectrum absorption. Harvested fruits were classified into small, medium and big. Analysis of Variance, Tukey test and Pearson correlations between production and foliar concentrations were performed. Higher fertilization levels of K with Zn increased medium and big fruits production (Kg and percentage). Foliar concentrations of K and Zn were positively correlated with big and medium fruit production and negatively correlated with small one. Chemical names used: Ethilenbis-ditiocarbamate of Zn (Zineb).

Effect of Foliar Application with Multi-Micronutrients and Polyamines on Productivity and Storeability of Valencia Oranges

“…10 -3 mM/Lit (PUT) + Multi-micronutrient treatment gave the maximum values (245.80) of fruit weight (g) of Valencia orange when compared with other treatments including control in the first season. Meanwhile, in the second season 10 -10 mM/Lit (PUT) + Multimicronutrient treatment gave the maximum values (234.90), presented in Table (4). These results were in agreement with those obtained by Qin and Qin (1996) and Rodríguez et al (2005) they stated that spraying with boron achieved the highest fruit weight of mandarin, orange. Also, Yadav et al (2013) proved that foliar spraying with multimicronutrient (B, Zn and Fe) was the promising treatment for improvement of fruit weight of peach.…”

Role of the foliar fertilization treatments on quality attributes of sweet cherry fruits (Prunus avium)

“…The important role of zinc, which functions as a cofactor in the structure and function of many enzymes (Jeffery et al, 1984;Hacisalihoglu et al, 2003;Andreini and Bertini, 2012), in various processes such as photosynthesis, carbohydrate metabolism and regulation of phytohormones (Hacisalihoglu et al, 2001;Krämer and Clemens, 2006;Alloway, 2008;Broadley et al, 2007;Gupta et al, 2011) can justify the influence of zinc on fruit quality characteristics in the study. As a matter of fact, Rodríguez et al (2005); Neilsen et al (2005); Khayyat et al (2007); Zhang et al (2013) have reported that zinc application can significantly improve fruit yield and quality in date palm, oranges and apples.…”

“…Zinc deficiency causes decrease in leaves, shoots and photosynthesis rate and hence, it affects yield and quality on fruit trees (Wang and Jin, 2005;Yan et al, 2010). Foliar zinc treatment in date palm, oranges and apples can significantly increase the zinc concentration, fruit yield and quality (Rodríguez et al, 2005;Neilsen et al, 2005;Khayyat et al, 2007;Zhang et al, 2013).…”

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“…Una investigación llevada a cabo en Argentina donde se evaluó la fertilización en el cultivo de naranja valencia (Citrus sinensis) con una dosis de 3 Kg K árbol -1 , reportaron un rendimiento de 140 Kg árbol -1 en comparación con el testigo que produjo 102 Kg (Rodríguez et al, 2005).…”

“…An investigation carried in Argentina, where the fertilization in the culture of Valencia orange (Citrus sinensis) with a dose of 3 Kg K tree -1 was evaluated, reported a yield of 140 Kg tree -1 in comparison to control, which produced 102 Kg (Rodríguez et al, 2005). Opazo and Razeto (2001) evaluated the effect of an annual dose of 3 Kg K 2 O tree -1 , in orange tree (Citrus sinensis),…”