Abstract
Abstract Uptake of NO3 ‐, NH4 +, P, K++, Ca++ and Mg++, as influenced by the stage of plant development and three NO3 ‐: NH4 + ratios (1: 0, 1: 1, and 0: 1), was determined for sweet pepper (Capsicum annuum L. cv. ‘California Wonder'). Uptake was highest during fruit development and immediately after fruit harvest, indicating that fruit removal promotes nutrient uptake. When NO3 ‐ and NH4 + were supplied in equal concentrations, NO3 ‐ was absorbed more readily. Each increment in NH4 + decreased the uptake of K+, Ca++, and Mg++ by fruit tissue, while no significant effect on the N and P content of the fruit was observed. Ammonium nutrition reduced plant dry weight and fruit yield in comparison to NO3 ‐. Results from this study suggest that NO3 ‐ is the preferred N form, and that fertilizer application should be scheduled according to specific physiological stages to maximize nutrient uptake. Nutrient content of vegetative tissue was not indicative of potential yield.
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Claims 12
Claim · model-written summary
Nutrient uptake was highest during fruit development and immediately after harvest.
- Taxon
- sweet pepper
Capsicum annuumt0 - Organ / stage
- fruit developmente0
- Outcome
- Uptakee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Uptake was highest during fruit development and immediately after fruit harvest”
Claim · model-written summary
Fruit removal was interpreted as promoting nutrient uptake.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- fruit removale0
- Outcome
- nutrient uptakee0
- Direction
- promotese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“fruit removal promotes nutrient uptake”
Claim · model-written summary
With equal nitrate and ammonium concentrations, nitrate was absorbed more readily.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- NO3 ‐ and NH4 + were supplied in equal concentrationse0
- Outcome
- NO3 ‐ was absorbede0
- Direction
- more readilye0
- Comparator
- NH4 +e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“When NO3 ‐ and NH4 + were supplied in equal concentrations, NO3 ‐ was absorbed more readily”
Claim · model-written summary
Each ammonium increment decreased fruit K+ uptake.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- fruit tissuee0
- Treatment
- Each increment in NH4 +e0
- Outcome
- uptake of K+e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Each increment in NH4 + decreased the uptake of K+, Ca++, and Mg++ by fruit tissue”
Claim · model-written summary
Each ammonium increment decreased fruit Ca++ uptake.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- fruit tissuee0
- Treatment
- Each increment in NH4 +e0
- Outcome
- Ca++e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Each increment in NH4 + decreased the uptake of K+, Ca++, and Mg++ by fruit tissue”
Claim · model-written summary
Each ammonium increment decreased fruit Mg++ uptake.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- fruit tissuee0
- Treatment
- Each increment in NH4 +e0
- Outcome
- Mg++e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Each increment in NH4 + decreased the uptake of K+, Ca++, and Mg++ by fruit tissue”
Claim · model-written summary
Ammonium increments had no significant effect on fruit N and P content.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- NH4 +e1
- Outcome
- N and P content of the fruite0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“no significant effect on the N and P content of the fruit was observed”
e1“Each increment in NH4 +”
Claim · model-written summary
Ammonium nutrition reduced plant dry weight relative to nitrate.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- Ammonium nutritione0
- Outcome
- plant dry weighte0
- Direction
- reducede0
- Comparator
- NO3 ‐e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Ammonium nutrition reduced plant dry weight and fruit yield in comparison to NO3 ‐”
Claim · model-written summary
Ammonium nutrition reduced fruit yield relative to nitrate.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- Ammonium nutritione0
- Outcome
- fruit yielde0
- Direction
- reducede0
- Comparator
- NO3 ‐e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Ammonium nutrition reduced plant dry weight and fruit yield in comparison to NO3 ‐”
Claim · model-written summary
Vegetative tissue nutrient content was not indicative of potential yield.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- vegetative tissuee0
- Outcome
- potential yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“Nutrient content of vegetative tissue was not indicative of potential yield”
Claim · model-written summary
The authors recommend nitrate as the preferred N form.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- NO3 ‐ is the preferred N forme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“NO3 ‐ is the preferred N form”
Claim · model-written summary
The authors recommend scheduling fertilizer application by physiological stage to maximize uptake.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- fertilizer application should be scheduled according to specific physiological stages to maximize nutrient uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet pepper”
e0“fertilizer application should be scheduled according to specific physiological stages to maximize nutrient uptake”
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See all 28 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.