Abstract
Abstract Tip burn in hydroponics lettuce is an undesirable phenomenon identified by necrotic breakdown of marginal tissue of leaves. A deep-water culture hydroponics system was designed to determine the effect of increasing nutritional calcium concentration and varying nutritional calcium sources in alleviating the tip burn development for the hydroponics growth of lettuce ( Lactuca sativa ). Lettuces was cultivated separately in an untreated fish wastewater (150mg/L) and four treated fish wastewaters with calcium addition by calcium hydroxide and calcium carbonate to concentrations of 250 and 350mg/L respectively. Increasing calcium concentration from 150 to 350mg/L demonstrated not only an increase in tip burn incidence by 33.33% (calcium carbonate) and 50% (calcium hydroxide), but a slower plant growth in comparison with lettuces cultivated at 150mg/L. Besides, lettuces treated by calcium carbonate has greater leaf calcium concentrations by 48.17% at constant calcium concentration, attributed to its high solubility to release more Ca 2+ ions in fish wastewater for plant adsorption. Results suggest that the addition of calcium carbonate to fish wastewater for hydroponics cultivation is more suitable for reducing the tip burn occurrence and growth inhibition at concentrations up to 150mg/L.
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Claims 5
Claim · model-written summary
Calcium carbonate at 350mg/L increased tip burn incidence by 33.33% versus 150mg/L.
- Taxon
- lettuces
Lactuca sativae0 - Treatment
- calcium carbonatee0
- Outcome
- tip burn incidencee0
- Direction
- increasee0
- Value
- 33.33%e0
- Comparator
- 150mg/Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing calcium concentration from 150 to 350mg/L demonstrated not only an increase in tip burn incidence by 33.33% (calcium carbonate) and 50% (calcium hydroxide), but a slower plant growth in comparison with lettuces cultivated at 150mg/L.”
Claim · model-written summary
Calcium hydroxide at 350mg/L increased tip burn incidence by 50% versus 150mg/L.
- Taxon
- lettucesLactuca sativae0
- Treatment
- calcium hydroxidee0
- Outcome
- tip burn incidencee0
- Direction
- increasee0
- Value
- 50%e0
- Comparator
- 150mg/Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing calcium concentration from 150 to 350mg/L demonstrated not only an increase in tip burn incidence by 33.33% (calcium carbonate) and 50% (calcium hydroxide), but a slower plant growth in comparison with lettuces cultivated at 150mg/L.”
Claim · model-written summary
Increasing calcium from 150 to 350mg/L slowed lettuce growth.
- Taxon
- lettucesLactuca sativae0
- Treatment
- Increasing calcium concentration from 150 to 350mg/Le0
- Outcome
- plant growthe0
- Direction
- slowere0
- Comparator
- 150mg/Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing calcium concentration from 150 to 350mg/L demonstrated not only an increase in tip burn incidence by 33.33% (calcium carbonate) and 50% (calcium hydroxide), but a slower plant growth in comparison with lettuces cultivated at 150mg/L.”
Claim · model-written summary
Calcium carbonate treatment increased leaf calcium concentration by 48.17% at constant calcium concentration.
- Taxon
- lettucesLactuca sativae0
- Treatment
- calcium carbonatee0
- Outcome
- leaf calcium concentrationse0
- Direction
- greatere0
- Value
- 48.17%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Besides, lettuces treated by calcium carbonate has greater leaf calcium concentrations by 48.17% at constant calcium concentration, attributed to its high solubility to release more Ca 2+ ions in fish wastewater for plant adsorption.”
Claim · model-written summary
The authors recommend calcium carbonate in fish wastewater up to 150mg/L to reduce tip burn and growth inhibition.
- Treatment
- addition of calcium carbonate to fish wastewatere0
- Outcome
- reducing the tip burn occurrence and growth inhibitione0
- Qualifier
- up to 150mg/Le0
Not reportedTaxon
Verbatim
e0“Results suggest that the addition of calcium carbonate to fish wastewater for hydroponics cultivation is more suitable for reducing the tip burn occurrence and growth inhibition at concentrations up to 150mg/L.”
The same questions in other papers
calcium carbonate · nutrient: content · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
calcium atom · growth · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 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.