Abstract
ABSTRACT Root temperature may affect the production of greenhouse vegetables under soilless culture. Four independent experiments were carried out over two consecutive crop cycles using two different substrates: rockwool and coconut coir waste. Three heating treatments were applied: non heating (T0), nutrient solution at 12–16°C (T1), and at 18–22°C (T2). The experiments were carried out in greenhouses in Almería (SE Spain) on cucumber and melon. Mean substrate and air temperature were not affected by the treatments. Under conditions of nutrient solution heating EC and percentage of drainage volume decreased, while water and mineral nutrient absorption increased. However, results showed great differences between both crops and substrates. A significant decrease in nitrate and phosphate emission from the substrates was also recorded, especially in rockwool substrate. Few effects were observed concerning yield and fruit quality parameters, but in rockwool-grown melon early yield was enhanced. It follows that nutrient solution heating is a low-cost and environmentally friendly method of increasing early melon yield.
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Claims 11
Claim · model-written summary
Heating did not affect mean substrate temperature.
- Taxon
- cucumber and melon
.jpg?width=60)
Cucumis melo
Cucumis sativuse2 - Treatment
- heating treatmentse1
- Outcome
- substratee0
- Direction
- not affectede0
- Comparator
- non heating (T0)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Mean substrate and air temperature were not affected by the treatments”
e1“Three heating treatments were applied: non heating (T0), nutrient solution at 12–16°C (T1), and at 18–22°C (T2)”
e2“on cucumber and melon”
Claim · model-written summary
Heating did not affect mean air temperature.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- heating treatmentse1
- Outcome
- air temperaturee0
- Direction
- not affectede0
- Comparator
- non heating (T0)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean substrate and air temperature were not affected by the treatments”
e1“Three heating treatments were applied: non heating (T0), nutrient solution at 12–16°C (T1), and at 18–22°C (T2)”
e2“on cucumber and melon”
Claim · model-written summary
Heating decreased EC.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse1
- Treatment
- nutrient solution heatinge0
- Outcome
- ECe0
- Direction
- decreasede0
- Comparator
- non heating (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under conditions of nutrient solution heating EC and percentage of drainage volume decreased”
e1“on cucumber and melon”
e2“non heating (T0)”
Claim · model-written summary
Heating decreased percentage of drainage volume.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse1
- Treatment
- nutrient solution heatinge0
- Outcome
- percentage of drainage volumee0
- Direction
- decreasede0
- Comparator
- non heating (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under conditions of nutrient solution heating EC and percentage of drainage volume decreased”
e1“on cucumber and melon”
e2“non heating (T0)”
Claim · model-written summary
Heating increased water absorption.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- nutrient solution heatinge1
- Outcome
- watere0
- Direction
- increasede0
- Comparator
- non heating (T0)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while water and mineral nutrient absorption increased”
e1“Under conditions of nutrient solution heating”
e2“on cucumber and melon”
e3“non heating (T0)”
Claim · model-written summary
Heating increased mineral nutrient absorption.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- nutrient solution heatinge1
- Outcome
- mineral nutrient absorptione0
- Direction
- increasede0
- Comparator
- non heating (T0)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while water and mineral nutrient absorption increased”
e1“Under conditions of nutrient solution heating”
e2“on cucumber and melon”
e3“non heating (T0)”
Claim · model-written summary
Heating significantly decreased nitrate emission, especially from rockwool.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- nutrient solution heatinge1
- Outcome
- nitratee0
- Direction
- decreasee0
- Qualifier
- especially in rockwool substratee0
- Comparator
- non heating (T0)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant decrease in nitrate and phosphate emission from the substrates was also recorded, especially in rockwool substrate”
e1“Under conditions of nutrient solution heating”
e2“on cucumber and melon”
e3“non heating (T0)”
Claim · model-written summary
Heating significantly decreased phosphate emission, especially from rockwool.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- nutrient solution heatinge1
- Outcome
- phosphate emissione0
- Direction
- decreasee0
- Qualifier
- especially in rockwool substratee0
- Comparator
- non heating (T0)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant decrease in nitrate and phosphate emission from the substrates was also recorded, especially in rockwool substrate”
e1“Under conditions of nutrient solution heating”
e2“on cucumber and melon”
e3“non heating (T0)”
Claim · model-written summary
Heating had few effects on yield and fruit quality parameters.
- Taxon
- cucumber and melonCucumis meloCucumis sativuse2
- Treatment
- nutrient solution heatinge1
- Outcome
- yield and fruit quality parameterse0
- Direction
- Few effectse0
- Comparator
- non heating (T0)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Few effects were observed concerning yield and fruit quality parameters”
e1“Under conditions of nutrient solution heating”
e2“on cucumber and melon”
e3“non heating (T0)”
Claim · model-written summary
Heating enhanced early yield in rockwool-grown melon.
- Taxon
- melonCucumis meloe0
- Treatment
- nutrient solution heatinge1
- Outcome
- early yielde0
- Direction
- enhancede0
- Qualifier
- rockwool-growne0
- Comparator
- non heating (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rockwool-grown melon early yield was enhanced”
e1“Under conditions of nutrient solution heating”
e2“non heating (T0)”
Claim · model-written summary
The authors recommend nutrient solution heating to raise early melon yield.
- Taxon
- melonCucumis meloe0
- Outcome
- nutrient solution heatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nutrient solution heating is a low-cost and environmentally friendly method of increasing early melon yield”
The same questions in other papers
fertilization · yield · Cucumis melo (muskmelon)Results differ
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- no effect
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1 in the opposite direction
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1 reporting no difference from an alternative
- positive
heat · yield · Cucumis melo (muskmelon)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
heat · soil: physics · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
fertilization · quality: grain · Cucumis melo (muskmelon)Positive and negative results
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- positive
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12 reporting no difference from an alternative
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See all 13 papers →fertilization · nutrient: content · Cucumis melo (muskmelon)Positive and negative results
9 papers in the same direction as this paper · 9 in the opposite direction
- no effect
- no effect
- no effect
15 papers more in this group
See all 19 papers →8 of 12 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.