Abstract
he development of an alternative greenhouse tomato (Solanum lycopersicum L.) production system to obtain four annual growing cycles requires delaying transplantation from 50 to 60 days after sowing (das). The study objectives were to evaluate the effects of paclobutrazol applications and population densities in the seedbed on the quality of seedlings to be transplanted at 60 das, and on the number of flowers and yield of plants pruned to three clusters. A randomized complete block experimental design was used with a split-plot arrangement with four replicates and 16 treatments that resulted from combining two population densities (150 and 300 seedlings∙m-2) and seven paclobutrazol treatments (one, two and three applications with 25 and 50mg∙L-1 of active ingredient), plus two controls (without application). The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das; however, at the end of the growing cycle the number of flowers and the yield per plant were lower. Triple applications of paclobutrazol, with 25 and 50 mg∙L-1, significantly decreased height and leaf area, but dry weight and stem thickness were similar to the control. Triple application of paclobutrazol resulted in two flowers and two more fruits per plant compared to the control, possibly because the temporary arrest of vegetative growth, caused by paclobutrazol, left more photoassimilates available for the inflorescences in formation.
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Claims 9
Claim · model-written summary
Lower seedbed density gave lower seedling height at 60 days after sowing.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- lower density in the seedbede1
- Outcome
- heighte1
- Direction
- lowere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e1“The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das”
Claim · model-written summary
Lower seedbed density gave larger seedling stem diameter at 60 days after sowing.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- lower density in the seedbede1
- Outcome
- stem diametere1
- Direction
- largere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e1“The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das”
Claim · model-written summary
Lower seedbed density gave higher seedling dry weight at 60 days after sowing.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- lower density in the seedbede1
- Outcome
- seedling dry weighte1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e1“The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das”
Claim · model-written summary
Lower seedbed density reduced the number of flowers and the yield per plant at the end of the cycle.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- lower density in the seedbede1
- Outcome
- the number of flowers and the yield per plante3
- Direction
- lowere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e1“The lower density in the seedbed resulted in lower height, larger stem diameter and higher seedling dry weight at 60 das”
e3“at the end of the growing cycle the number of flowers and the yield per plant were lower”
Claim · model-written summary
Triple paclobutrazol applications significantly decreased tomato plant height and leaf area compared with the control.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- Triple applications of paclobutrazole5
- Outcome
- height and leaf areae4
- Direction
- decreasede4
- Comparator
- the controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e5“Triple applications of paclobutrazol”
e4“significantly decreased height and leaf area, but dry weight and stem thickness were similar to the control”
Claim · model-written summary
Triple paclobutrazol applications left tomato dry weight and stem thickness similar to the control.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- Triple applications of paclobutrazole5
- Outcome
- dry weight and stem thicknesse4
- Direction
- similare4
- Comparator
- the controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e5“Triple applications of paclobutrazol”
e4“significantly decreased height and leaf area, but dry weight and stem thickness were similar to the control”
Claim · model-written summary
Triple paclobutrazol application increased flowers per plant by two relative to the control.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- Triple application of paclobutrazole6
- Outcome
- flowerse6
- Direction
- increaseinferrede6
- Value
- twoe6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e6“Triple application of paclobutrazol resulted in two flowers and two more fruits per plant compared to the control”
Claim · model-written summary
Triple paclobutrazol application increased fruits per plant by two more relative to the control.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- Triple application of paclobutrazole6
- Outcome
- fruitse6
- Direction
- increaseinferrede6
- Value
- two moree6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e6“Triple application of paclobutrazol resulted in two flowers and two more fruits per plant compared to the control”
Claim · model-written summary
Temporary arrest of vegetative growth by paclobutrazol possibly left more photoassimilates for the inflorescences.
- Taxon
- tomatoSolanum lycopersicume2
- Outcome
- photoassimilates available for the inflorescencese7
- Qualifier
- temporary arrest of vegetative growthe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“greenhouse tomato (Solanum lycopersicum L.)”
e7“temporary arrest of vegetative growth, caused by paclobutrazol, left more photoassimilates available for the inflorescences in formation”
The same questions in other papers
paclobutrazol · yield · Solanum lycopersicum (tomato)Results differ
5 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- negative
8 papers more in this group
See all 12 papers →paclobutrazol · growth · Solanum lycopersicum (tomato)Results differ
10 papers in the same direction as this paper · 16 in the opposite direction
- positive
- positive
- positive
23 papers more in this group
See all 27 papers →paclobutrazol · phenology · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
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.