Abstract
Tomato ( Lycopersicon esculentum Mill.) cv. Trust was grown in rockwool in summer and fall 1999 and 8 calcium/magnesium nutrient treatments, formed by two levels of calcium (Ca: 150 and 300 ppm) and four levels of magnesium (Mg: 20, 50, 80, and 110 ppm), were applied to investigate the effects on growth, fruit yield and quality. High calcium (300 ppm) increased overall fruit yield and size, reduced incidence of blossom-end rot and fruit cracking. However, high calcium also reduced the dry-matter content, soluble solid content and firmness of tomato fruit, and increased fruit russetting. Magnesium did not affect early growth or fruit production. However, 2 months after applying the treatments, the plants grown under 20 ppm Mg started to show Mg-deficient symptoms (leaf chlorosis), and Mg-deficient leaves lost more than 50% of their photosynthetic capability. The Mg concentration required for achieving high yield of firm fruit with high soluble solids and dry-matter content increased as the plant aged; i.e, 50 ppm in early stage of fruit production and 80 ppm in later stage of fruit production. At the end of experiment, the plants grown with 80 ppm of Mg also had the best root systems. Therefore, for both better yield and quality, a concentration of 300/50-80 ppm Ca/Mg may be recommended. Mg concentration may be started at 50 ppm and gradually be increased to 80 ppm in the later stage of fruit production.
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Claims 12
Claim · model-written summary
High calcium increased overall fruit yield and size.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- High calcium (300 ppm)e0
- Outcome
- overall fruit yield and sizee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High calcium (300 ppm) increased overall fruit yield and size”
t0“Tomato”
Claim · model-written summary
High calcium reduced blossom-end rot and fruit cracking.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- High calcium (300 ppm)e0
- Outcome
- incidence of blossom-end rot and fruit crackinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High calcium (300 ppm) increased overall fruit yield and size, reduced incidence of blossom-end rot and fruit cracking.”
t0“Tomato”
Claim · model-written summary
High calcium reduced fruit dry-matter and soluble solids.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- high calciume0
- Outcome
- dry-matter content, soluble solid contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high calcium also reduced the dry-matter content, soluble solid content and firmness of tomato fruit”
Claim · model-written summary
High calcium reduced tomato fruit firmness.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- high calciume0
- Outcome
- firmness of tomato fruite0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high calcium also reduced the dry-matter content, soluble solid content and firmness of tomato fruit”
Claim · model-written summary
High calcium increased fruit russetting.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- high calciume0
- Outcome
- fruit russettinge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high calcium also reduced the dry-matter content, soluble solid content and firmness of tomato fruit, and increased fruit russetting.”
Claim · model-written summary
Magnesium did not affect early growth or fruit production.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Magnesiume0
- Outcome
- early growth or fruit productione0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnesium did not affect early growth or fruit production.”
t0“Tomato”
Claim · model-written summary
At 20 ppm Mg, plants developed leaf chlorosis after two months.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 20 ppm Mge0
- Outcome
- Mg-deficient symptoms (leaf chlorosis)e0
- Qualifier
- 2 months after applying the treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2 months after applying the treatments, the plants grown under 20 ppm Mg started to show Mg-deficient symptoms (leaf chlorosis)”
t0“Tomato”
Claim · model-written summary
Magnesium-deficient leaves lost over half their photosynthetic capability.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese0
- Outcome
- photosynthetic capabilitye0
- Direction
- loste0
- Value
- more than 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mg-deficient leaves lost more than 50% of their photosynthetic capability.”
t0“Tomato”
Claim · model-written summary
The magnesium concentration required for high-quality yield increased with plant age.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Mg concentratione0
- Outcome
- Mg concentration required for achieving high yield of firm fruit with high soluble solids and dry-matter contente0
- Direction
- increasede0
- Value
- 50 ppme0
- Qualifier
- 80 ppm in later stage of fruit productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Mg concentration required for achieving high yield of firm fruit with high soluble solids and dry-matter content increased as the plant aged; i.e, 50 ppm in early stage of fruit production and 80 ppm in later stage of fruit production.”
t0“Tomato”
Claim · model-written summary
Plants grown with 80 ppm Mg had the best root systems at experiment end.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 80 ppm of Mge0
- Outcome
- root systemse0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the end of experiment, the plants grown with 80 ppm of Mg also had the best root systems.”
t0“Tomato”
Claim · model-written summary
The authors recommended 300/50-80 ppm calcium/magnesium for yield and quality.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- 300/50-80 ppm Ca/Mge0
- Qualifier
- better yield and qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for both better yield and quality, a concentration of 300/50-80 ppm Ca/Mg may be recommended.”
t0“Tomato”
Claim · model-written summary
The authors recommended starting Mg at 50 ppm and increasing to 80 ppm later.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- started at 50 ppm and gradually be increased to 80 ppme0
- Qualifier
- later stage of fruit productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mg concentration may be started at 50 ppm and gradually be increased to 80 ppm in the later stage of fruit production.”
t0“Tomato”
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