Diffuse greenhouse covering materials material technology, measurements and evaluation of optical properties

  title={Diffuse greenhouse covering materials material technology, measurements and evaluation of optical properties},
  author={Silke Hemming and V. Mohammadkhani and Tom A. Dueck},
At high irradiation levels, diffuse greenhouse coverings result in better light distribution, lower crop temperature, decreased transpiration, and increased photosynthesis and growth. Various greenhouse coverings (plastic films, glass panes and temporal coatings) can be used to transform direct light into diffuse light. However, light diffusing properties of materials are hardly known. Optical properties of a wide range of materials are being currently investigated, including direct light… 

Figures and Tables from this paper

Effects of Diffuse Light on Microclimate of Solar Greenhouse, and Photosynthesis and Yield of Greenhouse-grown Tomatoes
The application of diffuse light can potentially improve the homogeneity of light distribution and other microclimatic factors such as temperature inside greenhouses. In this study, diffuse light
Advanced Optical Materials for Sunlight Control in Greenhouses
The increasing demand for efficiently growing vegetation in greenhouses requires continual improvement of the control of the growth environment experienced by the plants. The single most important
Use of Natural and Artificial Light in Horticulture - Interaction of Plant and Technology
In intensive horticultural cultivation natural light levels often limit crop production during several periods. For an optimum plant production and product quality light intensity, spectrum and
Characterization of the Spectrum of Solar Irradiance under Different Crop Protection Coverings in Mediterranean Conditions and Effect on the Interception of Photosynthetically Active Radiation
The effect of two different covering materials, tempered glass and white polyethylene mesh, on solar irradiance was compared to open field (control) under real farming conditions to have important implications for the physiology and the productivity of crops under different covering Materials.
Effect of a diffuse glass greenhouse cover on rose production and quality
The effect of the diffusing cover on the photosynthetic properties of the crop, and the resulting production and quality is described.
Thin Glass: A Study on the Applicability in Greenhouse Coverings
Glass is a commonly used material for facades and roofs. Recently even structural glass elements have been developed and the application of glass in structural elements is becoming more common. The
Seeing light from a different angle: the effects of diffuse light on the function, structure, and growth of tomato plants
While considerable attention has been paid to how plants respond to changes in the spectral distribution and quantity of light, less attention has been paid to how plants respond to changes in the
Advantages of diffuse light for horticultural production and perspectives for further research
Some of the recent findings about the effect of diffuse light on light distribution over the canopy and its direct and indirect effects on crop photosynthesis and plant growth are shown and some perspectives for further research are suggested.
Ultraviolet Transparency of Plastic Films Determines the Quality of Lettuce (Lactuca sativa L.) Grown in a Greenhouse
The quality of red lettuce is based on the content of anthocyanin pigments, and the content of these pigments increases when the plant receives ultraviolet radiation. Lettuce crops are increasingly


The Effect of Diffuse Light on Crops
Modelling and experimental studies showed that crops such as fruit vegetables with a high plant canopy as well as ornamentals with a small plant canopy can utilize diffuse light better than direct light.
Filtering natural light by the greenhouse covering using model simulations - more production and better quality by diffuse light
Wageningen UR investigated the potentials of diffuse light for the use in Dutch horticulture. Light can be made diffuse by greenhouse covering materials. The transmission through the greenhouse
Measurement of optical properties of greenhouse cladding materials : harmonisation and standardisation
The aim of this European SMT (Standards, Measurements and Testing) project was the development of testing methods for measuring the ageing and the condensation behaviour of plastic films. For the
Greenhouse Covering Systems
Summary. The diversity of coverings for the greenhouse and other plant production structures has increased dramatically during the past 4 decades. This has resulted from the availability of new types
Numerical model to estimate the radiometric performance of net covered structures (AGRONETS) (published on the Conference Proceedings CD)
The design of structures to support nets for agricultural applications is mostly empirical. The radiometric behaviour of a net covered structure strongly depends on the shape of the structure, the
Responses to the physical environment
A.- Introduction: Perspectives in Ecological Plant Physiology.- 1 Fundamentals of Radiation and Temperature Relations.- 2 Photosynthetically Active Radiation.- 3 Responses to Different Quantum Flux
Response of a Deciduous Forest to the Mount Pinatubo Eruption: Enhanced Photosynthesis
It is found that the aerosol-induced increase in diffuse radiation by the volcano enhanced the terrestrial carbon sink and contributed to the temporary decline in the growth rate of atmospheric carbon dioxide after the eruption.
Een karakterisering van de zonnestraling in Nederland
Review Paper (SE—Structures and Environment): Radiometric and Thermal Properties of, and Testing Methods for, Greenhouse Covering Materials
Abstract In this paper, the most critical physical properties for the greenhouse covering materials are reviewed. The physical properties considered include the radiometric properties
Determination of the Spectral Properties of Several Greenhouse Cover Materials and Evaluation of Specific Parameters Related to Plant Response
Abstract The spectral radiometric properties of various greenhouse cover materials (glass and seven plastic films) were measured in the laboratory using a spectroradiometer equipped with an