Articles
Effect of tree leaf N status and N application time on yield and fruit N partitioning of mango
Article number
1183_22
Pages
161 – 166
Language
English
Abstract
Nitrogen (N) is an essential nutrient in mango (Mangifera indica L.), but research on N fertilizer uptake and partitioning in mango is lacking.
The objective of this study was to determine the influence of timing of N fertilizer application on yield and N allocation in leaves and fruits on mango trees (‘Kensington Pride’) with variable leaf N dry matter concentrations.
Nitrogen was applied (200 g tree-1) using 15N-labelled urea (2.1 atom% excess 15N) either at postharvest or pre-flowering on trees with low (1.0%N) and high (1.2%N) leaf N status.
Results showed that %N derived from fertilizer (%Ndff) was greater in high-leaf-N trees when N was applied during postharvest, but did not differ significantly when applied at pre-flowering.
Leaf N status of mango trees and timing of N application had no marked influence on total number of fruits, total fruit weight, or weight of fruit.
However, yield efficiency (total fruit yield divided by trunk cross-sectional area) in trees with high leaf N status was higher than those trees with low leaf N status, yet did not differ for timing of N application.
Total N uptake was higher in the flesh of the fruit from low-N trees than in high-leaf-N trees.
The %Ndff did not differ in the skin, flesh or seed of mango.
However, %Ndff was significantly higher in fruits from trees with low leaf N status and when N was applied at pre-flowering.
Results indicate that N allocation in the leaves and mango fruit differ depending on leaf N status of trees and timing of N application.
The objective of this study was to determine the influence of timing of N fertilizer application on yield and N allocation in leaves and fruits on mango trees (‘Kensington Pride’) with variable leaf N dry matter concentrations.
Nitrogen was applied (200 g tree-1) using 15N-labelled urea (2.1 atom% excess 15N) either at postharvest or pre-flowering on trees with low (1.0%N) and high (1.2%N) leaf N status.
Results showed that %N derived from fertilizer (%Ndff) was greater in high-leaf-N trees when N was applied during postharvest, but did not differ significantly when applied at pre-flowering.
Leaf N status of mango trees and timing of N application had no marked influence on total number of fruits, total fruit weight, or weight of fruit.
However, yield efficiency (total fruit yield divided by trunk cross-sectional area) in trees with high leaf N status was higher than those trees with low leaf N status, yet did not differ for timing of N application.
Total N uptake was higher in the flesh of the fruit from low-N trees than in high-leaf-N trees.
The %Ndff did not differ in the skin, flesh or seed of mango.
However, %Ndff was significantly higher in fruits from trees with low leaf N status and when N was applied at pre-flowering.
Results indicate that N allocation in the leaves and mango fruit differ depending on leaf N status of trees and timing of N application.
Publication
Authors
D. Hamilton, C. Martin, M. Bennet, M. Hearnden, C.A. Asis
Keywords
fertilizer 15N uptake, Mangifera indica, mango nutrition, N levels, timing of N fertilizer
Groups involved
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