Abstract
This paper investigates the improvement of human thermal comfort while working in protected horticulture. Shading materials are used in order to decrease light intensity and air temperature in greenhouses in summer. Lettuce (Lactuca sativa L.) plants were grown under two environmental conditions : clear (high light intensity and high temperature) and under shading (low light intensity and low temperature) together with four human working patterns; whole day clear (control), AM shading (morning work), midday shading (midday work) and PM shading (afternoon work) . Plants that were grown under control and midday work conditions had increased numbers of leaves, dry weight, chlorophyll content and photosynthetic activity, as compared to those grown under morning and afternoon work conditions. There was an inferior thermal environment and poorer crop qualities were observed in the plants grown under the control condition. The present experiment suggests that midday work may be a suitable working time for lettuce production in shaded greenhouses during summer.
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Claims 4
Claim · model-written summary
Control and midday shading increased lettuce leaf number and dry weight compared with morning and afternoon shading.
Verbatim
e0“Plants that were grown under control and midday work conditions had increased numbers of leaves, dry weight, chlorophyll content and photosynthetic activity, as compared to those grown under morning and afternoon work conditions.”
t0“Lettuce”
Claim · model-written summary
Control and midday shading increased lettuce chlorophyll content and photosynthetic activity compared with morning and afternoon shading.
- Taxon
- Lettuce
Lactuca sativat0 - Treatment
- control and midday work conditionse0
- Outcome
- chlorophyll content and photosynthetic activitye0
- Direction
- increasede0
- Comparator
- morning and afternoon work conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants that were grown under control and midday work conditions had increased numbers of leaves, dry weight, chlorophyll content and photosynthetic activity, as compared to those grown under morning and afternoon work conditions.”
t0“Lettuce (Lactuca sativa L.) plants”
Claim · model-written summary
Control conditions produced poorer crop qualities.
- Taxon
- LettuceLactuca sativat0
- Treatment
- control conditione0
- Outcome
- crop qualitiese0
- Direction
- poorere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“poorer crop qualities were observed in the plants grown under the control condition.”
t0“Lettuce (Lactuca sativa L.) plants”
Claim · model-written summary
The authors suggest midday work as a suitable schedule for summer lettuce production in shaded greenhouses.
- Taxon
- LettuceLactuca sativat0
- Outcome
- midday work may be a suitable working time for lettuce production in shaded greenhouses during summere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“midday work may be a suitable working time for lettuce production in shaded greenhouses during summer.”
t0“Lettuce (Lactuca sativa L.) plants”