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Athletic field paint steals spotlight from the grass it covers
Date:8/27/2012

archers suspected the coating of pigment on turfgrass was also damaging the grass by shielding it from the sun and reducing photosynthetically active radiation (PAR). PAR consists of wavelengths of light in the 400 to 700 nm range that plants use in photosynthesis.

The researchers looked at the reflection, transmission, and absorption of PAR in the four different paints, determining that red paint absorbs the highest amounts of PAR. By observing the carbon exchange rates in the painted turfgrass samples, the team also found red paint was more damaging to total canopy photosynthesis (TCP) than white paint, although diluting each color with water reduces their negative effects.

Results from this study further suggest that white paint reflects more PAR in the turfgrass canopy, allowing it to be absorbed by plants for photosynthesis. Over the course of the six-week study, diluted white paint reduced TCP by only 19%. However, the absorption of PAR by red paint eliminates the benefits of PAR reflection by the white and reduces TCP more drastically, the effects worsening as paint applications increase. The no-dilution red paint produced a 75% reduction in TCP by the final application.

The results from this study confirmed pigment's crucial role in the availability of PAR for plant use underneath latex paint. But more research is needed to fully explore the impacts different types of athletic field paint have on turfgrass photosynthesis and growth, say the scientists.

In a global sports market where field paint application plays a crucial role in the industry, understanding the delicate relationship between latex paints and grass will not only help improve turfgrass health but may also change the properties of paint products themselves.


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Contact: Madeline Fisher
mfisher@sciencesocieties.org
608-268-3973
American Society of Agronomy
Source:Eurekalert

Page: 1 2

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