Abstract
Abstract Blossom‐end rot is not the result of a single factor, but from the interaction of several factors. To prove this and to get information on how to lower the detrimental effect of blossom‐end rot, a multifactorial trial was conducted. Tomato plants, grown in rockwool in a circulating system, were fed with 0.75, 1.25, and 1.75 mM phosphate (P) and two calcium (Ca) levels resulting in 4.0 and 11.2 mM Ca in the leachate. Two air humidity levels were maintained. The low Ca, P, and humidity resulted in higher levels of blossom‐end rot than the higher levels of these factors. The increasing effect of low P on blossom‐end rot could be the result of the fact that at low P, ammonium (NH4) addition was higher than at high P, because at low P, the pH tended to increase and pH control was done by adding NH4. However, it is possible that an effect of P remains. The combination of the factors at the low levels gave rise to 59% blossom‐end rot. In this treatment, plants suffered in course of time from severe leaf deformation and die‐back of the growing point. Therefore, the experiment had to be stopped earlier than planned. The cause of the deformation was the high amount of blossom‐end rot. Plants were not able to store assimilates in fruits. To avoid blossom‐end rot, growers have to maintain the P concentration in the root environment of at least 1.7 mM and a Ca concentration of 8 to 9 mM. Air humidity should be kept high.
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Claims 9
Claim · model-written summary
Low calcium, phosphate and air humidity gave higher blossom-end rot in tomato than the higher levels of these factors.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- low Ca, P, and humiditye1
- Outcome
- blossom‐end rote1
- Direction
- highere1
- Comparator
- higher levels of these factorse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e1“The low Ca, P, and humidity resulted in higher levels of blossom‐end rot than the higher levels of these factors”
Claim · model-written summary
The combination of low-level factors gave 59% blossom-end rot in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- combination of the factors at the low levelse2
- Outcome
- blossom‐end rote2
- Value
- 59%e2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e2“The combination of the factors at the low levels gave rise to 59% blossom‐end rot”
Claim · model-written summary
The increasing effect of low phosphate on blossom-end rot may result from higher ammonium addition at low phosphate.
- Taxon
- tomatoSolanum lycopersicume0
- Compound
- ammonium (NH4)e1
- Outcome
- increasing effect of low P on blossom‐end rote1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e1“The increasing effect of low P on blossom‐end rot could be the result of the fact that at low P, ammonium (NH4) addition was higher than at high P”
Claim · model-written summary
Leaf deformation in tomato was caused by the high amount of blossom-end rot.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- leaf deformatione3
- Qualifier
- the high amount of blossom‐end rote4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e3“plants suffered in course of time from severe leaf deformation and die‐back of the growing point”
e4“The cause of the deformation was the high amount of blossom‐end rot”
Claim · model-written summary
Tomato plants in the low-level treatment suffered die-back of the growing point.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- growing pointe3
- Outcome
- die‐back of the growing pointe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e3“plants suffered in course of time from severe leaf deformation and die‐back of the growing point”
Claim · model-written summary
Tomato plants were not able to store assimilates in fruits.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- fruitse5
- Outcome
- store assimilates in fruitse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e5“Plants were not able to store assimilates in fruits”
Claim · model-written summary
Growers should maintain phosphate at least 1.7 mM and calcium at 8 to 9 mM in the root environment of tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- maintain the P concentration in the root environment of at least 1.7 mMe7
- Qualifier
- a Ca concentration of 8 to 9 mMe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e7“growers have to maintain the P concentration in the root environment of at least 1.7 mM and a Ca concentration of 8 to 9 mM”
Claim · model-written summary
Air humidity should be kept high to grow tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- Air humidity should be kept highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e1“Air humidity should be kept high”
Claim · model-written summary
Blossom-end rot in tomato results from the interaction of several factors, not from a single factor.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- blossom‐end rote6
- Qualifier
- the interaction of several factorse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants, grown in rockwool in a circulating system”
e6“Blossom‐end rot is not the result of a single factor, but from the interaction of several factors”
The same questions in other papers
calcium atom · disease · Solanum lycopersicum (tomato)Results differ
14 papers in the same direction as this paper · 35 in the opposite direction
- positive
- positive
- negative
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See all 50 papers →humidity · disease · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 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.