Abstract
Tommy Atkins mangoes grafted on 13-1 were grown in a soilless system, with basaltic lapilli as substrate, to study the effect of nitrogen and calcium supply on internal fruit breakdown (IFB). Treatments consisted in a complete factorial of 2 nitrogen (0.72 and 5.36 mmol/L) and 2 calcium levels (0.62 and 2.5 mmol/L). Water consumption and nutrient uptake were calculated by difference between quantities supplied and drained. Fruits were harvested at full maturity and the degree of IFB and yield were assessed for each treatment, determining mesocarp mineral content. Nutrient uptake increased as fruit developed, in a greater proportion for Ca than for N, decreasing from the onset of physiological maturity. A significant interaction between the effects of N and Ca was observed for all the studied variables. For low Ca treatments total yield and Ca content of fruits were remarkably reduced in the presence of high nitrogen. The degree of IFB and total-N content of fruits were remarkably greater in the high N treatments, although to a lesser extent for the higher Ca level. The incidence of IFB showed a high positive correlation with the fruit N content and a negative relation with the Ca content.
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Claims 9
Claim · model-written summary
Nutrient uptake increased during fruit development and declined from physiological maturity.
Verbatim
e0“Nutrient uptake increased as fruit developed, in a greater proportion for Ca than for N, decreasing from the onset of physiological maturity.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
Calcium uptake increased in greater proportion than nitrogen uptake during fruit development.
Verbatim
e0“Nutrient uptake increased as fruit developed, in a greater proportion for Ca than for N”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
Nitrogen and calcium effects interacted significantly for all studied variables.
Not reportedDirection
Verbatim
e0“A significant interaction between the effects of N and Ca was observed for all the studied variables.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
At low calcium, high nitrogen reduced total yield.
- Taxon
- MANGOESt0
- Treatment
- high nitrogene0
- Outcome
- total yielde0
- Direction
- reducede0
- Qualifier
- low Ca treatmentse0
Not reportedComparator
Verbatim
e0“For low Ca treatments total yield and Ca content of fruits were remarkably reduced in the presence of high nitrogen.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
At low calcium, high nitrogen reduced fruit calcium content.
- Taxon
- MANGOESt0
- Treatment
- high nitrogene0
- Outcome
- Ca content of fruitse0
- Direction
- reducede0
- Qualifier
- low Ca treatmentse0
Not reportedComparator
Verbatim
e0“For low Ca treatments total yield and Ca content of fruits were remarkably reduced in the presence of high nitrogen.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
High nitrogen increased internal fruit breakdown, less strongly at higher calcium.
- Taxon
- MANGOESt0
- Treatment
- high N treatmentse0
- Outcome
- degree of IFBe0
- Direction
- greatere0
- Qualifier
- to a lesser extent for the higher Ca levele0
Not reportedComparator
Verbatim
e0“The degree of IFB and total-N content of fruits were remarkably greater in the high N treatments, although to a lesser extent for the higher Ca level.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
High nitrogen increased fruit total nitrogen content, less strongly at higher calcium.
- Taxon
- MANGOESt0
- Treatment
- high N treatmentse0
- Outcome
- total-N content of fruitse0
- Direction
- greatere0
- Qualifier
- to a lesser extent for the higher Ca levele0
Not reportedComparator
Verbatim
e0“The degree of IFB and total-N content of fruits were remarkably greater in the high N treatments, although to a lesser extent for the higher Ca level.”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
Internal fruit breakdown incidence was positively correlated with fruit nitrogen content.
Verbatim
e0“The incidence of IFB showed a high positive correlation with the fruit N content”
t0“MANGOES (MANGIFERA INDICA L.)”
Claim · model-written summary
Internal fruit breakdown incidence was negatively related to calcium content.
Verbatim
e0“The incidence of IFB showed a high positive correlation with the fruit N content and a negative relation with the Ca content.”
t0“MANGOES (MANGIFERA INDICA L.)”
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