Abstract
High-quality cucumber seedlings are a prerequisite for ensuring high yield of cucumbers. With the continuous increase of cucumber planting area in China, the demand for high-quality cucumber seedlings is also increasing. One of the important ways to improve the quality of cucumber seedlings is to improve the light environment by using artificial light source. In this study, three cucumber seedlings (cv. Jintong, cv. Yunv and cv. Xiazhiguang) were grown for 23 d under eight levels of daily light integral (DLI) at 4.3 mol/(m2·d), 8.6 mol/(m2·d), 10.1 mol/(m2·d), 13.0 mol/(m2·d), 5.8 mol/(m2·d), 11.5 mol/(m2·d), 14.4 mol/(m2·d) and 17.3 mol/(m2·d), respectively. The results showed that when DLI was 14.4 mol/(m2·d), the seedling height, stem diameter, total leaf area and shoot dry/fresh weight of all three cucumber cultivars reached the maximum, while hypocotyl length decreased with the increase of light intensity. When DLI was 14.4 mol/(m2·d), Jintong and Xiazhiguang had the highest health index, which were 49.29 and 28.56, respectively, while that of Yunv was 81.59 (DLI = 14.4 mol/(m2·d)). With the increase of DLI, the photosynthetic capacity of cucumber increases gradually. The highest net photosynthetic rate was shown at DLI of 14.4 mol/(m2·d), while the chlorophyll content of cucumber seedlings of all three cultivars were less affected by DLI. Jintong and Yunv had the highest chlorophyll content when DLI was 8.6 mol/(m2·d) because they were adapted to low-light environment. In conclusion, the DLI of 14.4 mol/(m2·d) for Jintong and Xiazhiguang, while that of 17.3 mol/(m2·d) for Yunv are suggested for the light environment design of factory-cultivated seedling for cucumber. Keywords: cucumber seedling, daily light integral (DLI), growth, photosynthesis DOI: 10.25165/j.ijabe.20201305.5566 Citation: Ji F, Wei S Q, Liu N, Xu L J, Yang P. Growth of cucumber seedlings in different varieties as affected by light environment. Int J Agric & Biol Eng, 2020; 13(5): 73–78.
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Claims 12
Claim · model-written summary
At a DLI of 14.4 mol/(m2·d), seedling height, stem diameter and total leaf area of cucumber reached their maximum.
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- DLI was 14.4 mol/(m2·d)e1
- Outcome
- seedling height, stem diameter, total leaf areae1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that when DLI was 14.4 mol/(m2·d), the seedling height, stem diameter, total leaf area and shoot dry/fresh weight of all three cucumber cultivars reached the maximum, while hypocotyl length decreased with the increase of light intensity”
t0“Growth of cucumber seedlings”
Claim · model-written summary
At a DLI of 14.4 mol/(m2·d), shoot dry and fresh weight of cucumber reached their maximum.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- DLI was 14.4 mol/(m2·d)e1
- Outcome
- shoot dry/fresh weighte1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that when DLI was 14.4 mol/(m2·d), the seedling height, stem diameter, total leaf area and shoot dry/fresh weight of all three cucumber cultivars reached the maximum, while hypocotyl length decreased with the increase of light intensity”
t0“Growth of cucumber seedlings”
Claim · model-written summary
Hypocotyl length of cucumber decreased as light intensity increased.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- light intensitye1
- Outcome
- hypocotyl lengthe1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that when DLI was 14.4 mol/(m2·d), the seedling height, stem diameter, total leaf area and shoot dry/fresh weight of all three cucumber cultivars reached the maximum, while hypocotyl length decreased with the increase of light intensity”
t0“Growth of cucumber seedlings”
Claim · model-written summary
At a DLI of 14.4 mol/(m2·d), cultivar Jintong had the highest health index, 49.29.
- Taxon
- cucumberCucumis sativust0
- Material
- Jintonge2
- Treatment
- DLI was 14.4 mol/(m2·d)e2
- Outcome
- health indexe2
- Direction
- higheste2
- Value
- 49.29e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“When DLI was 14.4 mol/(m2·d), Jintong and Xiazhiguang had the highest health index, which were 49.29 and 28.56, respectively, while that of Yunv was 81.59 (DLI = 14.4 mol/(m2·d))”
t0“Growth of cucumber seedlings”
Claim · model-written summary
At a DLI of 14.4 mol/(m2·d), cultivar Xiazhiguang had the highest health index, 28.56.
- Taxon
- cucumberCucumis sativust0
- Material
- Xiazhiguange2
- Treatment
- DLI was 14.4 mol/(m2·d)e2
- Outcome
- health indexe2
- Direction
- higheste2
- Value
- 28.56e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“When DLI was 14.4 mol/(m2·d), Jintong and Xiazhiguang had the highest health index, which were 49.29 and 28.56, respectively, while that of Yunv was 81.59 (DLI = 14.4 mol/(m2·d))”
t0“Growth of cucumber seedlings”
Claim · model-written summary
At a DLI of 14.4 mol/(m2·d), cultivar Yunv had a health index of 81.59.
- Taxon
- cucumberCucumis sativust0
- Material
- Yunve2
- Treatment
- DLI was 14.4 mol/(m2·d)e2
- Outcome
- health indexe2
- Value
- 81.59e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“When DLI was 14.4 mol/(m2·d), Jintong and Xiazhiguang had the highest health index, which were 49.29 and 28.56, respectively, while that of Yunv was 81.59 (DLI = 14.4 mol/(m2·d))”
t0“Growth of cucumber seedlings”
Claim · model-written summary
The highest net photosynthetic rate of cucumber seedlings was at a DLI of 14.4 mol/(m2·d).
- Taxon
- cucumberCucumis sativust0
- Treatment
- DLI of 14.4 mol/(m2·d)e3
- Outcome
- net photosynthetic ratee3
- Direction
- higheste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The highest net photosynthetic rate was shown at DLI of 14.4 mol/(m2·d)”
t0“Growth of cucumber seedlings”
Claim · model-written summary
Photosynthetic capacity of cucumber increased gradually with DLI.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DLIe4
- Outcome
- photosynthetic capacitye4
- Direction
- increasese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“With the increase of DLI, the photosynthetic capacity of cucumber increases gradually”
t0“Growth of cucumber seedlings”
Claim · model-written summary
Chlorophyll content of the three cucumber cultivars was less affected by DLI.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DLIe5
- Outcome
- chlorophyll contente5
- Direction
- no_changeinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“while the chlorophyll content of cucumber seedlings of all three cultivars were less affected by DLI”
t0“Growth of cucumber seedlings”
Claim · model-written summary
Jintong and Yunv had the highest chlorophyll content at a DLI of 8.6 mol/(m2·d), attributed to adaptation to low light.
- Taxon
- cucumberCucumis sativust0
- Material
- Jintong and Yunve6
- Treatment
- DLI was 8.6 mol/(m2·d)e6
- Outcome
- chlorophyll contente6
- Direction
- higheste6
- Qualifier
- because they were adapted to low-light environmente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Jintong and Yunv had the highest chlorophyll content when DLI was 8.6 mol/(m2·d) because they were adapted to low-light environment”
t0“Growth of cucumber seedlings”
Claim · model-written summary
A DLI of 14.4 mol/(m2·d) is suggested for light environment design of factory-cultivated seedlings of Jintong and Xiazhiguang.
- Taxon
- cucumberCucumis sativuse7
- Material
- Jintong and Xiazhiguange7
- Treatment
- the DLI of 14.4 mol/(m2·d)e7
- Outcome
- light environment designe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the DLI of 14.4 mol/(m2·d) for Jintong and Xiazhiguang, while that of 17.3 mol/(m2·d) for Yunv are suggested for the light environment design of factory-cultivated seedling for cucumber”
t0“Growth of cucumber seedlings”
Claim · model-written summary
A DLI of 17.3 mol/(m2·d) is suggested for light environment design of factory-cultivated seedlings of Yunv.
- Taxon
- cucumberCucumis sativuse7
- Material
- Yunve7
- Treatment
- 17.3 mol/(m2·d)e7
- Outcome
- light environment designe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the DLI of 14.4 mol/(m2·d) for Jintong and Xiazhiguang, while that of 17.3 mol/(m2·d) for Yunv are suggested for the light environment design of factory-cultivated seedling for cucumber”
t0“Growth of cucumber seedlings”
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