UPTAKE, DISTRIBUTION AND REQUIREMENTS OF MACRO ELEMENTS IN ÂSENSATIONâ MANGO TREES

Stassen, P. J. C.; Grové, H. G.; Davie, S. J.

doi:10.17660/actahortic.2000.509.42

Cited by 7 publications

(5 citation statements)

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“…Roots, wood, bark, and new shoots accounted for more than a third of the total N stored in 6-year-old mango tree cv. Sensation (Stassen and van Vuuren, 1997; Stassen et al, 2000). Therefore, it is reasonable to assume that N quantities accumulated in these organs during the vegetative period of August–April could serve later throughout the reproductive period as N reserves for the high demand of the developing fruit.…”

Section: Discussionmentioning

confidence: 99%

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Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

Silber¹,

Goldberg

Shapira

et al. 2021

Preprint

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We assessed the effects of N concentration in the irrigation water on nutrient uptake and distribution in leaves and fruit of mango cv. Keitt grown in a lysimeter for four years. We applied three treatments: N1, no N fertilization (less than 2 mg/L in the tap water); N2, 10 mg/L N; N3, 20 mg/L N. Deficient N conditions (N1) generated low vegetative yield, high fruit:leaf ratio, high photosynthetic activity, high leaf P and K concentrations, and high sugar content along with low acidity in the fruit. Excess N concentration (N3) induced vegetative growth, and reduced fruit yield and gas-exchange characteristics. The calculated annual nitrogen uptake heavily depended on the nitrogen supply (N1-26 g/tree; N2-196 g/tree; N3- 185 g/tree). Fruits were the major N sink being 0.82, 0.26 and 0.05 from the total annual N supplied. The N quantities accumulated in N1 fruits during the reproductive season (May-August), were above the N quantities supplied via fertigation, suggesting that N reserve in the vegetative tissues supplied the fruits high N demand. The finding shows the importance of adequate nitrogen supply to mango trees and the dangers of excessive fertilization.

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Section: Discussionmentioning

confidence: 99%

“…Taking into consideration nutrient quantities removed by the expected yield (Fig. 6) and the vegetative growth (Stassen et al, 2000), combined with fertilization efficiency coefficient will provide a solid foundation for any fertilization management program.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

Silber¹,

Goldberg

Shapira

et al. 2021

Preprint

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“…The contrasting effects of flowering and fruit growth on leaf nitrogen may be attributed to the availability of nitrogen at different stages of tree development. Total tree nitrogen content is lowest at flowering and increases after fruit set, especially in the leaves (Stassen et al 2000). Flowering decreases leaf nitrogen due to the diversion of nitrogenous compounds from leaves to sinks such as the inflorescences (Durán-Zuazo et al 2005).…”

Section: The Proximity Of Fruit To the Leavesmentioning

confidence: 99%

“…Flowering decreases leaf nitrogen due to the diversion of nitrogenous compounds from leaves to sinks such as the inflorescences (Durán-Zuazo et al 2005). During fruit growth, the leaves and fruit accumulate nitrogen, indicating increased soil nitrogen uptake during this period (Stassen et al 2000), suggesting that nitrogen is primarily directed towards the fruit and nearby leaves.…”

Section: The Proximity Of Fruit To the Leavesmentioning

confidence: 99%

The roles of non-structural carbohydrates in fruiting: a review focusing on mango (Mangifera indica)

Rossouw,

Orr,

Bennett

et al. 2024

Funct. Plant Biol.

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Reproductive development of fruiting trees, including mango (Mangifera indica L.), is limited by non-structural carbohydrates. Competition for sugars increases with cropping, and consequently, vegetative growth and replenishment of starch reserves may reduce with high yields, resulting in interannual production variability. While the effect of crop load on photosynthesis and the distribution of starch within the mango tree has been studied, the contribution of starch and sugars to different phases of reproductive development requires attention. This review focuses on mango and examines the roles of non-structural carbohydrates in fruiting trees to clarify the repercussions of crop load on reproductive development. Starch buffers the plant’s carbon availability to regulate supply with demand, while sugars provide a direct resource for carbon translocation. Sugar signalling and interactions with phytohormones play a crucial role in flowering, fruit set, growth, ripening and retention, as well as regulating starch, sugar and secondary metabolites in fruit. The balance between the leaf and fruit biomass affects the availability and contributions of starch and sugars to fruiting. Crop load impacts photosynthesis and interactions between sources and sinks. As a result, the onset and rate of reproductive processes are affected, with repercussions for fruit size, composition, and the inter-annual bearing pattern.

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“…Mango has an annual growth and harvest cycle and therefore it is critical to apply N fertilizer in relation to tree requirements such as annual nutrient exports (Stassen et al, 2000) and timing associated with the annual phonological cycle. The timing of vegetative and floral growth varies with variety and growing location.…”

Section: Introductionmentioning

confidence: 99%

When is the best time to apply postharvest nitrogen fertiliser?

Ibell¹,

Bally²,

Wright³

et al. 2017

Acta Hortic.

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The effect of application timing of nitrogen to mango trees was investigated over 3 years to determine if pre-harvest applications of N affected fruit quality, canopy growth, flowering and tree yield in 8 year-old Kensington Pride (KP) and R2E2 mango trees growing in Far North Queensland. The experiment consisted of six treatments where a total of 156 g N per tree was applied as 340 grams of urea at different application times and proportions. The treatments were applied as 1) 100% post-harvest (control), 2) 50% 2 weeks preharvest plus 50% 2 weeks post-harvest, 3) 35% 2 weeks pre-harvest plus 65% 2 weeks post-harvest, 4) 65% 2 weeks pre-harvest plus 35% 2 weeks post-harvest, 5) 35% 4 weeks pre-harvest plus 65% 4 weeks post-harvest, and 6) 65% 4 weeks pre-harvest plus 35% 4 weeks post-harvest. The results indicated that the pre-harvest applications of N did not significantly affect tree or orchard yield, fruit weight, size or number, nor did it negatively influence background skin colour or disease incidence at eating ripe in either variety, when compared to the control (100% N added post-harvest). In the R2E2 trees, treatments 4 and 6 had an increased total panicle count. For the KP trees, pre-harvest applications of N in treatments 5, 6, 4 and 2 had increased stages of floral development when compared to the control trees, at the early stages of flowering. These results indicate applications of N fertiliser prior to harvest can positively influence seasonal vegetative growth and early inflorescence development but responses are variety specific. Therefore, N fertiliser applications can be added prior to harvest to encourage rapid floral and vegetative development after pruning without negative effects on fruit quality particularly if N is applied as split applications at the recommended rate for tree size and variety.

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UPTAKE, DISTRIBUTION AND REQUIREMENTS OF MACRO ELEMENTS IN ÂSENSATIONâ MANGO TREES

Cited by 7 publications

References 0 publications

Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

The roles of non-structural carbohydrates in fruiting: a review focusing on mango (Mangifera indica)

When is the best time to apply postharvest nitrogen fertiliser?

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UPTAKE, DISTRIBUTION AND REQUIREMENTS OF MACRO ELEMENTS IN ÂSENSATIONâ MANGO TREES

Cited by 7 publications

References 0 publications

Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

Nitrogen uptake and macronutrients distribution in mango trees (cv. Keitt) under three N fertigation treatments

The roles of non-structural carbohydrates in fruiting: a review focusing on mango (Mangifera indica)

When is the best time to apply postharvest nitrogen fertiliser?

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Product

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UPTAKE, DISTRIBUTION AND REQUIREMENTS OF MACRO ELEMENTS IN ÂSENSATIONâ MANGO TREES