Abstract
Strawberry cultivation depends on environmental factors, making its cultivation in the greenhouse a challenge in the winter. This study investigated the most appropriate greenhouse cladding material and thermal screen configuration for strawberry production in the winter by considering greenhouse air temperature, relative humidity (RH, vapor pressure deficit (VPD, and solar radiation (SR). Two gothic greenhouses with different cladding materials and thermal screen configurations, namely, the single-layer greenhouse and double-layer greenhouse, were used for strawberry cultivation. The greenhouse microclimate was controlled by natural ventilation aided with circulating fans and boilers. Strawberries were planted on 5 greenhouse benches, 660 stands per greenhouse. Daily environmental parameters were recorded and processed into daytime and nighttime. The impacts of cladding material-thermal screen configurations on temperature, RH, VPD, and SR, and the subsequent effect on strawberry yield in both greenhouse systems, were evaluated. Comparing the environmental parameters recorded in the single-layer and double-layer greenhouse showed that VPD and SR were significantly different in the daytime, whereas RH and VPD were significantly different in the nighttime. The post hoc test further showed that RH, VPD, and SR in both greenhouses were significantly different. The significant difference in RH and VPD can be attributed to the inner layer of polyethene in the double-layer greenhouse, which sealed up the pores of the thermal screen, resulting in humidity buildup, causing a lower VPD than in the single-layer greenhouse. The single-layer greenhouse yield was 14% greater than the double-layer greenhouse yield and can be attributed to the higher daytime VPD and lower RH achieved in the single-layer greenhouse at night. The study established that though the single-layer greenhouse system was cost-effective regarding construction, the operating cost of the single-layer greenhouse was higher than that of the double-layer greenhouse.
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Claims 8
Claim · model-written summary
Daytime VPD and solar radiation differed significantly between greenhouse systems.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Outcome
- VPD and SRe0
- Qualifier
- in the daytimee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“VPD and SR were significantly different in the daytime”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
Nighttime RH and VPD differed significantly between greenhouse systems.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- RH and VPDe0
- Qualifier
- in the nighttimee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RH and VPD were significantly different in the nighttime”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
Post hoc testing found RH, VPD and SR differed significantly across both systems.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- RH, VPD, and SRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RH, VPD, and SR in both greenhouses were significantly different”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
The inner polyethene layer caused humidity buildup and lower VPD.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- lower VPDe0
- Qualifier
- sealed up the pores of the thermal screene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inner layer of polyethene in the double-layer greenhouse, which sealed up the pores of the thermal screen, resulting in humidity buildup, causing a lower VPD than in the single-layer greenhouse”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
Single-layer greenhouse strawberry yield was 14% greater than double-layer yield.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- single-layer greenhousee0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 14%e0
- Comparator
- double-layer greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The single-layer greenhouse yield was 14% greater than the double-layer greenhouse yield”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
The authors attribute the single-layer yield advantage to higher daytime VPD and lower nighttime RH.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- higher daytime VPD and lower RHe0
- Qualifier
- single-layer greenhouse at nighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attributed to the higher daytime VPD and lower RH achieved in the single-layer greenhouse at night”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
Single-layer greenhouses had lower construction cost.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- cost-effective regarding constructione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single-layer greenhouse system was cost-effective regarding construction”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
Claim · model-written summary
Single-layer greenhouses had higher operating cost than double-layer greenhouses.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- operating coste0
- Direction
- highere0
- Comparator
- double-layer greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“operating cost of the single-layer greenhouse was higher than that of the double-layer greenhouse”
t0“Strawberry (Fragaria ananassa var. “Seolhyang”) Yield in Winter”
The same questions in other papers
cultivation system · yield · Fragaria x ananassa (strawberry)Positive and negative results
12 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
15 papers more in this group
See all 19 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.