Abstract
Effects of soil temperature variation on photosynthesis of cucumber seedlings were studied in greenhouse by using timed soil warming with heating lines. The results showed that,compared with the control,soil warming at 6:00- 8:00 significantly increased soil temperature.Especially at 7:00- 12:00,higher soil temperature not only reduced the stomatal limit of cucumber leaves,increased the stomatal conductance and intercellular CO2 concentration,but also significantly increased ФPSII,Pn,AQY and CE of cucumber leaves. When soil was warmed at12:00,Pnand ФPSIIof cucumber leaves were 62. 3% and 19. 67% higher than those of the control,respectively,while soil temperature had little effect on Fv/Fmof cucumber leaves. Soil warming in solar greenhouse significantly promoted the growth of cucumber seedlings by increasing the plant height,stem diameter,and fresh weight; the shoot fresh weight was 113. 8% higher than that of the control. In short,soil warming improved the utilization capability of CO2 and light energy by cucumber seedling leaves,improved photosynthesis of cucumber seedlings and promoted the growth of cucumber seedlings through increasing soil temperature. The results can serve as a theoretical basis for cucumber cultivation in cold seasons.
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Claims 11
Claim · model-written summary
Soil warming at 6:00- 8:00 significantly raised soil temperature versus control.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- soil warming at 6:00- 8:00e0
- Outcome
- soil temperaturee0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the control,soil warming at 6:00- 8:00 significantly increased soil temperature”
t0“cucumber seedlings”
Claim · model-written summary
Higher soil temperature reduced cucumber leaf stomatal limitation.
- Taxon
- cucumberCucumis sativuse0
- Organ / stage
- leavese0
- Treatment
- higher soil temperaturee0
- Outcome
- stomatal limite0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher soil temperature not only reduced the stomatal limit of cucumber leaves”
Claim · model-written summary
Higher soil temperature increased cucumber leaf stomatal conductance and intercellular CO2 concentration.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- higher soil temperaturee0
- Outcome
- stomatal conductance and intercellular CO2 concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher soil temperature not only reduced the stomatal limit of cucumber leaves,increased the stomatal conductance and intercellular CO2 concentration”
Claim · model-written summary
Higher soil temperature significantly increased ФPSII and Pn in cucumber leaves.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- ФPSII,Pne0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly increased ФPSII,Pn,AQY and CE of cucumber leaves”
Claim · model-written summary
Higher soil temperature significantly increased AQY and CE in cucumber leaves.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- AQY and CEe0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly increased ФPSII,Pn,AQY and CE of cucumber leaves”
Claim · model-written summary
At 12:00 soil warming, cucumber leaf Pn was 62. 3% higher than control.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- soil was warmed at12:00e0
- Outcome
- Pne0
- Direction
- highere0
- Value
- 62. 3%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When soil was warmed at12:00,Pnand ФPSIIof cucumber leaves were 62. 3% and 19. 67% higher than those of the control,respectively”
Claim · model-written summary
At 12:00 soil warming, cucumber leaf ФPSII was 19. 67% higher than control.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- soil was warmed at12:00e0
- Outcome
- ФPSIIe0
- Direction
- highere0
- Value
- 19. 67%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When soil was warmed at12:00,Pnand ФPSIIof cucumber leaves were 62. 3% and 19. 67% higher than those of the control,respectively”
Claim · model-written summary
Soil temperature had little effect on cucumber leaf Fv/Fm.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- soil temperaturee0
- Outcome
- Fv/Fme0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil temperature had little effect on Fv/Fmof cucumber leaves”
Claim · model-written summary
Greenhouse soil warming increased cucumber seedling height, stem diameter, and fresh weight.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Soil warminge0
- Outcome
- plant height,stem diameter,and fresh weighte0
- Direction
- increasinge0
- Setting
- solar greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil warming in solar greenhouse significantly promoted the growth of cucumber seedlings by increasing the plant height,stem diameter,and fresh weight”
Claim · model-written summary
Soil warming raised shoot fresh weight 113. 8% above control.
- Taxon
- cucumberCucumis sativust0
- Outcome
- shoot fresh weighte0
- Direction
- highere0
- Value
- 113. 8%e0
- Comparator
- the controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the shoot fresh weight was 113. 8% higher than that of the control”
t0“cucumber seedlings”
Claim · model-written summary
The authors infer that warming improved cucumber seedling use of CO2 and light energy.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- soil warminge0
- Outcome
- utilization capability of CO2 and light energye0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil warming improved the utilization capability of CO2 and light energy by cucumber seedling leaves”
The same questions in other papers
heat · growth · Cucumis sativus (cucumber)Results differ
15 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- no effect
21 papers more in this group
See all 25 papers →heat · soil: physics · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
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.