Abstract
The application of diffuse light can potentially improve the homogeneity of light distribution and other microclimatic factors such as temperature inside greenhouses. In this study, diffuse light plastic films with different degrees of light diffuseness (20% and 29%) were used as the south roof cover of Chinese solar greenhouses to investigate the spatial distribution of microclimatic factors and their impacts on the growth and yield of tomato. The horizontal and vertical photosynthetic photon flux density ( PPFD ) distributions, air temperature distribution, and leaf temperature distribution inside the canopy, tomato leaf net photosynthesis (P n ), and fruit production during the growth period were determined. The results showed that diffuse light plastic film continuously improved the light distribution in the vertical and horizontal spaces of the crop canopy in terms of light interception and uniformity. A more diffuse light fraction also decreased the air and leaf temperatures of the middle canopy and upper canopy during the summer, thereby promoting the photosynthesis of the tomato plants. P n of the middle and lower canopies with higher haze film were significantly greater than those with lower haze film (19.0% and 27.2%, respectively). The yields of higher stem density and lower stem density planted tomatoes in the 29% haze compartment were increased by 5.5% and 12.9% compared with 20% in the haze group, respectively. Diffuse light plastic films can improve the homogeneity of the canopy light distribution and increase crop production in Chinese solar greenhouses.
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Claims 7
Claim · model-written summary
Diffuse light plastic film improved the light distribution in the vertical and horizontal canopy space of tomato, in light interception and uniformity.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- diffuse light plastic filme3
- Outcome
- light distributione3
- Direction
- improvede3
- Setting
- Chinese solar greenhousese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“their impacts on the growth and yield of tomato”
e2“diffuse light plastic films with different degrees of light diffuseness (20% and 29%) were used as the south roof cover of Chinese solar greenhouses”
e3“diffuse light plastic film continuously improved the light distribution in the vertical and horizontal spaces of the crop canopy in terms of light interception and uniformity”
Claim · model-written summary
A more diffuse light fraction decreased air and leaf temperatures of the middle and upper canopy in summer.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- middle canopy and upper canopye4
- Treatment
- more diffuse light fractione4
- Outcome
- air and leaf temperaturese4
- Direction
- decreasede4
- Setting
- during the summere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“their impacts on the growth and yield of tomato”
e4“A more diffuse light fraction also decreased the air and leaf temperatures of the middle canopy and upper canopy during the summer, thereby promoting the photosynthesis of the tomato plants”
Claim · model-written summary
A more diffuse light fraction promoted photosynthesis of tomato plants.
- Taxon
- tomatoSolanum lycopersicume4
- Treatment
- more diffuse light fractione4
- Outcome
- photosynthesise4
- Direction
- promotinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A more diffuse light fraction also decreased the air and leaf temperatures of the middle canopy and upper canopy during the summer, thereby promoting the photosynthesis of the tomato plants”
Claim · model-written summary
Net photosynthesis (Pn) of the middle canopy under higher haze film was significantly greater than under lower haze film, by 19.0%.
- Taxon
- tomatoSolanum lycopersicume4
- Organ / stage
- middle and lower canopiese5
- Treatment
- higher haze filme5
- Outcome
- P ne5
- Direction
- greatere5
- Value
- 19.0%e5
- Comparator
- lower haze filme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A more diffuse light fraction also decreased the air and leaf temperatures of the middle canopy and upper canopy during the summer, thereby promoting the photosynthesis of the tomato plants”
e5“P n of the middle and lower canopies with higher haze film were significantly greater than those with lower haze film (19.0% and 27.2%, respectively)”
Claim · model-written summary
Net photosynthesis (Pn) of the lower canopy under higher haze film was significantly greater than under lower haze film, by 27.2%.
- Taxon
- tomatoSolanum lycopersicume4
- Organ / stage
- middle and lower canopiese5
- Treatment
- higher haze filme5
- Outcome
- P ne5
- Direction
- greatere5
- Value
- 27.2%e5
- Comparator
- lower haze filme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A more diffuse light fraction also decreased the air and leaf temperatures of the middle canopy and upper canopy during the summer, thereby promoting the photosynthesis of the tomato plants”
e5“P n of the middle and lower canopies with higher haze film were significantly greater than those with lower haze film (19.0% and 27.2%, respectively)”
Claim · model-written summary
Tomatoes with higher stem density in the 29% haze compartment yielded 5.5% more than those in the 20% haze group.
- Taxon
- tomatoesSolanum lycopersicume6
- Treatment
- 29% haze compartmente6
- Outcome
- yieldse6
- Direction
- increasede6
- Value
- 5.5%e6
- Qualifier
- higher stem densitye6
- Comparator
- 20% in the haze groupe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The yields of higher stem density and lower stem density planted tomatoes in the 29% haze compartment were increased by 5.5% and 12.9% compared with 20% in the haze group, respectively”
Claim · model-written summary
Tomatoes with lower stem density in the 29% haze compartment yielded 12.9% more than those in the 20% haze group.
- Taxon
- tomatoesSolanum lycopersicume6
- Treatment
- 29% haze compartmente6
- Outcome
- yieldse6
- Direction
- increasede6
- Value
- 12.9%e6
- Qualifier
- lower stem densitye6
- Comparator
- 20% in the haze groupe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The yields of higher stem density and lower stem density planted tomatoes in the 29% haze compartment were increased by 5.5% and 12.9% compared with 20% in the haze group, respectively”
The same questions in other papers
light · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
64 papers in the same direction as this paper · 43 in the opposite direction · 5 reporting no difference from an alternative
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- positive
- negative
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