Abstract
Application of “plant factory” concept in protected culture is gaining momentum due to its technological and economic merits in many countries. This research examined the plant growth and yield of vertically grown pak choi (Brassica rapa var. chinensis) (in nutrient film technique (NFT) culture) under supplementary lighting with two different combinations of blue to red color LEDs (1:9 and 1:2 ratios) in comparison with horticulture grade and non-horticulture grade (recommended for general use) white (full spectrum) LED while keeping sunlight as the control treatment. Meanwhile NFT culture was compared to plant growth, yield and nitrate accumulation of basil (Ocimum basilicum L.) in comparison with conventional soil, culture and compost mixed coco-peat substrate in a replicated trial, conducted under greenhouse conditions with intensive micro climate control. A significantly high vegetative growth and total to yield could be found in the NFT grown basil. The nitrate accumulation in basil leaves was well below the maximum permissible limit (MPL), set-fourth by the recommendations of the European Health Commission. Meanwhile, the highest overall leaf quality of pak choi was achieved by the normal LEDs. Horticulture graded to LED maintained fairly high chlorophyll a and b contents contributing to its characteristic leaf color.
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Claims 4
Claim · model-written summary
NFT grown basil had significantly high vegetative growth and total yield.
- Taxon
- basil
Ocimum basilicume0 - Treatment
- NFTe0
- Outcome
- vegetative growth and total to yielde0
- Direction
- highe0
- Comparator
- conventional soil, culture and compost mixed coco-peat substratee1
- Setting
- greenhouse conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly high vegetative growth and total to yield could be found in the NFT grown basil.”
e1“conventional soil, culture and compost mixed coco-peat substrate”
e2“greenhouse conditions”
Claim · model-written summary
Basil leaf nitrate accumulation was well below the maximum permissible limit.
- Taxon
- basilOcimum basilicume0
- Organ / stage
- leavese0
- Outcome
- nitrate accumulatione0
- Direction
- well belowe0
- Comparator
- maximum permissible limite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrate accumulation in basil leaves was well below the maximum permissible limit (MPL), set-fourth by the recommendations of the European Health Commission.”
Claim · model-written summary
Normal LEDs produced the highest overall pak choi leaf quality.
Not reportedComparator
Verbatim
e0“Meanwhile, the highest overall leaf quality of pak choi was achieved by the normal LEDs.”
Claim · model-written summary
Horticulture grade LED maintained fairly high chlorophyll a and b contents, contributing to leaf color.
- Taxon
- Pak Choit0
- Treatment
- Horticulture graded to LEDe0
- Outcome
- chlorophyll a and b contentse0
- Direction
- fairly highe0
- Qualifier
- contributing to its characteristic leaf colore0
Not reportedComparator
Verbatim
e0“Horticulture graded to LED maintained fairly high chlorophyll a and b contents contributing to its characteristic leaf color.”
t0“Pak Choi (Brassica rapa var. chinensis)”
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See all 14 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.