Claim · model-written summary
Lowering environmental humidity with an evaporative equivalence factor is proposed to compensate for low radiation in tomato crops.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- use of an evaporative equivalence factore1
- Outcome
- compensating by lowering the humidity of the environmente1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato leaves”
e1“It provides a basis for compensating by lowering the humidity of the environment by use of an evaporative equivalence factor relating vapour pressure deficit to radiation incident on the crop”
Title
D. P. Airman; G. Houter Journal of Horticultural Science 1990. doi:10.1080/00221589.1990.11516053
Other claims from this paper (7)
- Association Solar radiation has a greater effect on the upper parts of tomato plants than on progressively shaded lower canopy parts.
- Association A greater change in humidity would be needed to maintain upper-leaf transpiration at reduced irradiance than lower-leaf transpiration.
- Mechanism The calcium accumulation rate in tomato leaves would be closely linked to transpiration.
- Mechanism The model can explain calcium deficiency in tomato leaves that develop during periods of low solar intensity and high humidity.
- Recommendation Transpiration should be at least 2.2 times the rate of leaf expansion to prevent appreciable yield loss from calcium deficiency in tomato.
- Recommendation A total of 8.7 MJ m-2 d_l of radiation and radiation equivalent would be required for tomato.
- Recommendation Vapour pressure deficit compensation of 0.04 kPa per MJ m-2 d-1 of radiation shortfall is required in tomato.