Abstract
SummaryThe effects of nitrogen and potassium on the growth of single-truss tomatoes and on the yield and quality of the fruit have been examined. Two successive crops of cv. Minicraigella were grown with sub-irrigation in a tiered-trough system, the troughs containing a 7:3:2 mixture of loam, peat and grit. Four concentrations of nitrogen in solution (100, 150, 200 and 250 ppm N) were tested in factorial combination with three concentrations of potassium (200, 300 and 400 ppm K), the treatments being replicated four times.Plant height and leaf length increased markedly with N concentration, as also did the numbers of flowers and marketable fruits per plant, the mean weight per fruit and the total yield. Low N levels delayed harvesting. The proportion of unevenly ripened fruit decreased with increasing concentrations both of N and K. The percentage of hollow fruits was decreased by high K but increased with N concentration.The titratable acidity of the expressed fruit juices increased significantly with N concentration (P<0.001) but was little affected by K treatment. The N concentration of the nutrient solution also largely controlled the percentage of K in the leaves and the total uptake of this nutrient. These unexpected results were attributed to stimulation of growth by N, leading to increased water requirement and hence to increased application of both N and K by the automatic sub-irrigation system.The highest yields and best quality fruit were obtained with 250 ppm N and 400 ppm K in the solution, although lower concentrations of K might be preferable after continued cropping in the same compost.
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Claims 13
Claim · model-written summary
Plant height and leaf length of single-truss tomatoes increased markedly with the nitrogen concentration of the nutrient solution.
- Taxon
- Tomatoes
Solanum lycopersicumt0 - Treatment
- N concentratione0
- Outcome
- Plant height and leaf lengthe0
- Direction
- increased markedlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“Plant height and leaf length increased markedly with N concentration”
Claim · model-written summary
The numbers of flowers and of marketable fruits per plant increased with nitrogen concentration.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- N concentratione0
- Outcome
- the numbers of flowers and marketable fruits per plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“Plant height and leaf length increased markedly with N concentration, as also did the numbers of flowers and marketable fruits per plant, the mean weight per fruit and the total yield”
Claim · model-written summary
Mean fruit weight and total yield increased with nitrogen concentration.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- N concentratione0
- Outcome
- the mean weight per fruit and the total yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“Plant height and leaf length increased markedly with N concentration, as also did the numbers of flowers and marketable fruits per plant, the mean weight per fruit and the total yield”
Claim · model-written summary
Low nitrogen levels delayed harvesting.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Low N levelse0
- Outcome
- harvestinge0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“Low N levels delayed harvesting”
Claim · model-written summary
The proportion of unevenly ripened fruit decreased with increasing concentrations of both N and K.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- increasing concentrations both of N and Ke0
- Outcome
- proportion of unevenly ripened fruite0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The proportion of unevenly ripened fruit decreased with increasing concentrations both of N and K”
Claim · model-written summary
High potassium decreased the percentage of hollow fruits.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- high Ke0
- Outcome
- percentage of hollow fruitse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The percentage of hollow fruits was decreased by high K but increased with N concentration”
Claim · model-written summary
The percentage of hollow fruits increased with nitrogen concentration.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- N concentratione0
- Outcome
- percentage of hollow fruitse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The percentage of hollow fruits was decreased by high K but increased with N concentration”
Claim · model-written summary
Titratable acidity of the fruit juices increased significantly with nitrogen concentration (P<0.001).
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- N concentratione0
- Outcome
- titratable acidity of the expressed fruit juicese0
- Direction
- increased significantlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The titratable acidity of the expressed fruit juices increased significantly with N concentration (P<0.001)”
Claim · model-written summary
Titratable acidity of the fruit juices was little affected by potassium treatment.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- K treatmente0
- Outcome
- titratable acidity of the expressed fruit juicese0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The titratable acidity of the expressed fruit juices increased significantly with N concentration (P<0.001) but was little affected by K treatment”
Claim · model-written summary
The nitrogen concentration of the nutrient solution largely controlled the percentage of K in the leaves and the total K uptake.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- N concentration of the nutrient solutione0
- Outcome
- percentage of K in the leaves and the total uptake of this nutriente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The N concentration of the nutrient solution also largely controlled the percentage of K in the leaves and the total uptake of this nutrient”
Claim · model-written summary
The unexpected nitrogen effects on leaf K and K uptake were attributed to growth stimulation by N, increasing water requirement and hence the application of N and K by the sub-irrigation system.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- percentage of K in the leaves and the total uptake of this nutriente0
- Qualifier
- stimulation of growth by N, leading to increased water requirement and hence to increased application of both N and Ke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“the percentage of K in the leaves and the total uptake of this nutrient”
e1“stimulation of growth by N, leading to increased water requirement and hence to increased application of both N and K”
Claim · model-written summary
The highest yields and best quality fruit were obtained with 250 ppm N and 400 ppm K in the solution.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- 250 ppm N and 400 ppm K in the solutione0
- Outcome
- highest yields and best quality fruite0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“The highest yields and best quality fruit were obtained with 250 ppm N and 400 ppm K in the solution”
Claim · model-written summary
Lower concentrations of K might be preferable after continued cropping in the same compost.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- lower concentrations of K might be preferablee0
- Qualifier
- after continued cropping in the same composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Single-Truss Tomatoes”
e0“lower concentrations of K might be preferable after continued cropping in the same compost”
The same questions in other papers
potassium · molecular: expression · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
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nitrogen · quality: general · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 4 in the opposite direction · 2 reporting no difference from an alternative
- positive
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13 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- negative
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See all 16 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.