Abstract
Leaf samples of ‘Star Ruby’ grapefruit (Citrus paradisi Macf.) were collected from fruiting terminals (FT) and non-fruiting terminals (NFT) at monthly interval during the growing period to study the nutrient dynamics. The mean nutrient concentrations for N, P, K, Zn, Cu and Mn were found higher in the leaves from non-fruiting terminals (2.21%, 0.13%, 2.07%, 20.81 ppm, 10.68 ppm, 17.06 ppm) as compared to fruiting terminals (1.60%, 0.12%, 2.01%, 18.87 ppm, 9.92 ppm, 15.88 ppm). However, the mean nutrient concentrations for Ca, Mg and Fe were recorded higher in the leaves from fruiting terminals (4.10%, 0.412%, 145.50 ppm) as compared to nonfruiting terminals (3.94%, 0.367, 141.51 ppm). Similarly, K, Mg, Zn and Cu contents were higher in younger leaves, while, Ca, Fe and Mn contents were more in older leaves. There were non-significant variations in the content of N, P, K, Ca, Mg, Fe, Zn, Cu and Mn in the leaves from FT and NFT during September-October. The dynamics of leaves micronutrient content showed higher intensity of seasonal variations than the macronutrient content. The regression analysis explained the correlation between type of terminals and the linear regression in leaves accounted 86, 75 and 79% variability in data for the N, K and Mn, respectively.
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Claims 7
Claim · model-written summary
N, P, K, Zn, Cu and Mn concentrations were higher in non-fruiting terminal leaves.
- Taxon
- grapefruit
_Pompelino_Grapefruit_002.jpg?width=60)
Citrus ×paradisit0 - Organ / stage
- leaves from non-fruiting terminalse0
- Outcome
- mean nutrient concentrations for N, P, K, Zn, Cu and Mne0
- Direction
- highere0
- Comparator
- fruiting terminalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Pompelino_Grapefruit_002.jpg?width=500)
Verbatim
e0“The mean nutrient concentrations for N, P, K, Zn, Cu and Mn were found higher in the leaves from non-fruiting terminals (2.21%, 0.13%, 2.07%, 20.81 ppm, 10.68 ppm, 17.06 ppm) as compared to fruiting terminals (1.60%, 0.12%, 2.01%, 18.87 ppm, 9.92 ppm, 15.88 ppm).”
t0“grapefruit”
Claim · model-written summary
Ca, Mg and Fe concentrations were higher in fruiting terminal leaves.
- Taxon
- grapefruitCitrus ×paradisit0
- Organ / stage
- leaves from fruiting terminalse0
- Outcome
- mean nutrient concentrations for Ca, Mg and Fee0
- Direction
- highere0
- Comparator
- nonfruiting terminalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mean nutrient concentrations for Ca, Mg and Fe were recorded higher in the leaves from fruiting terminals (4.10%, 0.412%, 145.50 ppm) as compared to nonfruiting terminals (3.94%, 0.367, 141.51 ppm).”
t0“grapefruit”
Claim · model-written summary
K, Mg, Zn and Cu were higher in younger leaves.
- Taxon
- grapefruitCitrus ×paradisit0
- Organ / stage
- younger leavese0
- Outcome
- K, Mg, Zn and Cu contentse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K, Mg, Zn and Cu contents were higher in younger leaves”
t0“grapefruit”
Claim · model-written summary
Ca, Fe and Mn contents were higher in older leaves.
- Taxon
- grapefruitCitrus ×paradisit0
- Organ / stage
- older leavese0
- Outcome
- Ca, Fe and Mn contentse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca, Fe and Mn contents were more in older leaves.”
t0“grapefruit”
Claim · model-written summary
Terminal types did not differ significantly in nine nutrient contents during September–October.
- Taxon
- grapefruitCitrus ×paradisit0
- Organ / stage
- leaves from FT and NFTe0
- Outcome
- content of N, P, K, Ca, Mg, Fe, Zn, Cu and Mne0
- Direction
- non-significant variationse0
- Qualifier
- September-Octobere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were non-significant variations in the content of N, P, K, Ca, Mg, Fe, Zn, Cu and Mn in the leaves from FT and NFT during September-October.”
t0“grapefruit”
Claim · model-written summary
Micronutrients varied more seasonally than macronutrients.
- Taxon
- grapefruitCitrus ×paradisit0
- Outcome
- seasonal variationse0
- Direction
- highere0
- Comparator
- macronutrient contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dynamics of leaves micronutrient content showed higher intensity of seasonal variations than the macronutrient content.”
t0“grapefruit”
Claim · model-written summary
Terminal type regression accounted for 86%, 75% and 79% variability in N, K and Mn, respectively.
- Taxon
- grapefruitCitrus ×paradisit0
- Organ / stage
- type of terminalse0
- Outcome
- variability in data for the N, K and Mne0
- Value
- 86, 75 and 79%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regression analysis explained the correlation between type of terminals and the linear regression in leaves accounted 86, 75 and 79% variability in data for the N, K and Mn, respectively.”
t0“grapefruit”