Abstract
Experiments were carried out to evaluate two salts, K 2 SO 4 and NaCl, as materials to supplement the electrical conductivity (EC) of the basic nutrient solution in nutrient film technique (NFT). The effects of these materials on the growth, yield and fruit quality of greenhouse tomato ( Lycopersicon esculentum Mill.) grown by NFT were quantified. These effects were tested by increasing the recirculating solution EC from a base value of 1500 μS·cm -1 to that suitable for the crop growth stage with normal feed (macronutrients), 0.38 m (0.53 lb/gal) K 2 SO 4 or 1.14 m (0.55 lb/gal) NaCl, at a common pH of 6.2. In 1995 and 1996, there were no significant effects of the treatments on crop growth. In 1995, the early marketable yield was significantly lower when K 2 SO 4 was used but the yield at the end of the season did not differ among the treatments. Furthermore, with K 2 SO 4 , the proportion of grade #1 fruit in early total yield was lower than in the control, while, fruit biomass content was higher than in the NaCl treatment. In 1996, the cumulative marketable fruit weight was unaffected by the treatments. A trend toward high number of large grade fruit occurred with the NaCl treatment. The pH and EC of the fruit homogenate were favorably affected by the NaCl treatment. Adding K 2 SO 4 or NaCl in partial substitution of macronutrients in the recirculating solution may have a role in NFT systems in not only reducing environmental pollution (from nitrates and phosphates) and fertilizer costs, but also in improving fruit quality and, therefore, profit margins.
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Claims 8
Claim · model-written summary
K2SO4 and NaCl treatments had no significant effect on greenhouse tomato growth in 1995 and 1996.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicume0 - Treatment
- treatmentse1
- Outcome
- crop growthe1
- Direction
- no significant effectse1
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e1“In 1995 and 1996, there were no significant effects of the treatments on crop growth”
Claim · model-written summary
K2SO4 significantly lowered early marketable yield in 1995.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- K 2 SO 4e2
- Outcome
- early marketable yielde2
- Direction
- lowere2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e2“In 1995, the early marketable yield was significantly lower when K 2 SO 4 was used”
Claim · model-written summary
With K2SO4, the proportion of grade #1 fruit in early total yield was lower than in the control.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- K 2 SO 4e3
- Outcome
- proportion of grade #1 fruit in early total yielde3
- Direction
- lowere3
- Comparator
- controle3
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e3“Furthermore, with K 2 SO 4 , the proportion of grade #1 fruit in early total yield was lower than in the control, while, fruit biomass content was higher than in the NaCl treatment”
Claim · model-written summary
With K2SO4, fruit biomass content was higher than with the NaCl treatment.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- K 2 SO 4e3
- Outcome
- fruit biomass contente3
- Direction
- highere3
- Comparator
- NaCl treatmente3
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e3“Furthermore, with K 2 SO 4 , the proportion of grade #1 fruit in early total yield was lower than in the control, while, fruit biomass content was higher than in the NaCl treatment”
Claim · model-written summary
Cumulative marketable fruit weight in 1996 was unaffected by the treatments.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- treatmentse4
- Outcome
- cumulative marketable fruit weighte4
- Direction
- unaffectede4
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e4“In 1996, the cumulative marketable fruit weight was unaffected by the treatments”
Claim · model-written summary
The NaCl treatment showed a trend toward a high number of large grade fruit.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- NaCl treatmente5
- Outcome
- number of large grade fruite5
- Direction
- highe5
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e5“A trend toward high number of large grade fruit occurred with the NaCl treatment”
Claim · model-written summary
The NaCl treatment favorably affected pH and EC of the fruit homogenate.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Treatment
- NaCl treatmente6
- Outcome
- pH and EC of the fruit homogenatee6
- Direction
- favorably affectede6
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e6“The pH and EC of the fruit homogenate were favorably affected by the NaCl treatment”
Claim · model-written summary
Partial substitution of macronutrients with K2SO4 or NaCl may reduce environmental pollution from nitrates and phosphates in NFT systems.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Outcome
- reducing environmental pollution (from nitrates and phosphates)e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greenhouse tomato ( Lycopersicon esculentum Mill.)”
e7“may have a role in NFT systems in not only reducing environmental pollution (from nitrates and phosphates)”
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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.