Abstract
ABSTRACT Nitrogen and potassium fertilization and assessment of adequate nutritional status are essential for increasing fruit production of passion fruit. However, studies related to characterization of the leaf nutrient concentration and content in passion fruit with different production capacities are scarce in the literature in Brazil. The objective of this study was to evaluate macronutrient leaf concentration and content in different parts of the reproductive shoot of yellow passion fruit subjected to different ratios of N and K fertilization. The study was conducted in a randomized block design, with three replications, following a 4 x 6 factorial arrangement consisting of four cultivars of yellow passion fruit (BRS Gigante Amarelo, IAC 275, BRS Ouro Vermelho, and BRS Sol do Cerrado) and six application rates of N-K2O fertilizer (0-0, 50-125, 100-250, 150-375, 200-500, and 250-625 kg ha-1 year-1). Two leaf sampling methods were adopted (leaf located at a position adjacent to the fruit, and leaf located at the end of the reproductive branch) for nutritional assessment. The leaf located at the adjacent position had lower N, P, K, Mg, and S concentration and higher Ca concentration than the concentrations observed in the standard leaf. However, the higher leaf dry matter in adjacent leaves resulted in increased macronutrient concentration/content. The increase in N-K fertilizations inhibited Ca and Mg content in the leaves adjacent to the fruit of the Gigante Amarelo, IAC, and Ouro Vermelho passion fruit cultivars, but did not affect Ca and Mg content in the standard leaf. The passion fruit cultivars showed different leaf nutrient contents after N-K fertilization, indicating variable nutritional demands and the need for specific diagnostic methods for each cultivar.
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Claims 8
Claim · model-written summary
Leaves adjacent to the fruit had lower N, P and K concentration than the standard leaf.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e2“The leaf located at the adjacent position had lower N, P, K, Mg, and S concentration and higher Ca concentration than the concentrations observed in the standard leaf”
Claim · model-written summary
Leaves adjacent to the fruit had lower Mg and S concentration than the standard leaf.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e2“The leaf located at the adjacent position had lower N, P, K, Mg, and S concentration and higher Ca concentration than the concentrations observed in the standard leaf”
Claim · model-written summary
Leaves adjacent to the fruit had higher Ca concentration than the standard leaf.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e2“The leaf located at the adjacent position had lower N, P, K, Mg, and S concentration and higher Ca concentration than the concentrations observed in the standard leaf”
Claim · model-written summary
Higher leaf dry matter in adjacent leaves increased macronutrient concentration and content.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e3“the higher leaf dry matter in adjacent leaves resulted in increased macronutrient concentration/content”
Claim · model-written summary
N-K fertilization inhibited Ca and Mg content in leaves adjacent to the fruit of three passion fruit cultivars.
- Taxon
- yellow passion fruite1
- Material
- Gigante Amarelo, IAC, and Ouro Vermelhoe4
- Organ / stage
- leaves adjacent to the fruite4
- Treatment
- N-K fertilizationse4
- Outcome
- Ca and Mg contente4
- Direction
- inhibitede4
Not reportedComparator
Verbatim
e1“reproductive shoot of yellow passion fruit”
e4“The increase in N-K fertilizations inhibited Ca and Mg content in the leaves adjacent to the fruit of the Gigante Amarelo, IAC, and Ouro Vermelho passion fruit cultivars”
Claim · model-written summary
N-K fertilization did not affect Ca and Mg content in the standard leaf.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e4“The increase in N-K fertilizations inhibited Ca and Mg content in the leaves adjacent to the fruit of the Gigante Amarelo, IAC, and Ouro Vermelho passion fruit cultivars”
e5“did not affect Ca and Mg content in the standard leaf”
Claim · model-written summary
Passion fruit cultivars showed different leaf nutrient contents after N-K fertilization.
- Taxon
- passion fruit
Passiflora edulise6 - Treatment
- N-K fertilizatione6
- Outcome
- leaf nutrient contentse6
- Direction
- differente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The passion fruit cultivars showed different leaf nutrient contents after N-K fertilization”
Claim · model-written summary
Each passion fruit cultivar needs specific diagnostic methods for leaf nutrient assessment.
Verbatim
e1“reproductive shoot of yellow passion fruit”
e7“indicating variable nutritional demands and the need for specific diagnostic methods for each cultivar”
The same questions in other papers
fertilization · nutrient: content · Passiflora edulis (passion fruit)Positive and negative results
5 reporting no difference from an alternative
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.