Featured Research

from universities, journals, and other organizations

Shadehouses with photoselective nets featured in study of growing conditions

Date:
November 19, 2013
Source:
American Society for Horticultural Science
Summary:
Researchers monitored environmental data inside shadehouses with full covering of red, blue, pearl, and black nets in central Florida over 12 months. The report documents the different environmental modifications inside the structures, which will help predict or interpret specific plant responses, including photosynthetically active radiation and air temperatures.

Shade nets are widely used in ornamental crop production systems to protect crops from radiation, wind, hail, and birds. According to a 2011 study from the United States Department of Agriculture, 43% of floricultural crop production in the United States occurred under shade or other temporary cover. Although black nets are most common, growers have begun experimenting with colored, gray, and white "dispersive" netting in order to determine effects of the colored nets on crop vigor, dwarfing, branching, leaf variegation, and flowering time. Researchers from the University of Florida's Mid-Florida Research and Education Center published results of a 12-month research study in HortScience, in which they evaluated light quantity, light quality, and other environmental variables inside shadehouses fitted with photoselective and color-neutral nets. They anticipate that their study findings will be helpful to growers, horticulturists, and agricultural engineers.

Related Articles


According to author Steven Arthurs, today's photoselective (colored) and color-neutral dispersive shade nettings are made of woven or knitted polypropylene materials with different dimensions of fibers and holes designed to create specific shade levels. "Traditional black nets are completely opaque, and the spectral quality of radiation is not modified by the nets, while dispersive shade nets are less opaque and scatter radiation, creating more diffused light that can penetrate inside plant canopies, Arthurs explained, adding that colored nets contain additives that selectively filter solar radiation to promote specific wavelengths of light."

The researchers designed a study using 16 shadehouse structures that were covered on the top and all sides with one of two photoselective (red and blue), or one of two color neutral (black and pearl) nets. "This setup allowed us to monitor the impact of the full spectrum of environmental conditions (not just light) independently," said Arthurs. The researchers then took light measurements monthly.

"We found that all shade nets reduced PAR compared with uncovered sites, but there were differences between colors," the scientists said. "Observed PAR values were reduced most under black nets and least under red nets with blue and pearl nets intermediate. Our results showed that photosynthetic shading values were black (55% to 60%), blue (51% to 57%), pearl (52% to 54%), and red (41% to 51%), depending on the season."

The research team examined the effects of the shade nets on other environmental variables as well. Average daily maximum air temperatures were higher inside shadehouses with colored nets compared with black nets or ambient. Highest air temperatures were recorded under red, while black nets were consistently cooler. Blue and pearl recorded similar temperatures, and were intermediate between red and black nets.

"Our study documents the different environmental modifications inside structures covered with black and colored nets, which will help predict or interpret specific plant responses," the authors said. "However, a review of the literature suggests that the responses of different plant species to modified light conditions are often variable."


Story Source:

The above story is based on materials provided by American Society for Horticultural Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Steven P. Arthurs1 Robert H. Stamps Frank F. Giglia. Environmental Modification Inside Photoselective Shadehouses. HortScience, 2013 [link]

Cite This Page:

American Society for Horticultural Science. "Shadehouses with photoselective nets featured in study of growing conditions." ScienceDaily. ScienceDaily, 19 November 2013. <www.sciencedaily.com/releases/2013/11/131119101053.htm>.
American Society for Horticultural Science. (2013, November 19). Shadehouses with photoselective nets featured in study of growing conditions. ScienceDaily. Retrieved March 1, 2015 from www.sciencedaily.com/releases/2013/11/131119101053.htm
American Society for Horticultural Science. "Shadehouses with photoselective nets featured in study of growing conditions." ScienceDaily. www.sciencedaily.com/releases/2013/11/131119101053.htm (accessed March 1, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, March 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Whale-Watching Scientists Spot Baby Orca

Whale-Watching Scientists Spot Baby Orca

AP (Feb. 28, 2015) Researchers following endangered killer whales spotted a baby orca off the coast of Washington state, the third birth documented this winter but still leaving the population dangerously low. (Feb. 28) Video provided by AP
Powered by NewsLook.com
The Best Drinks for Your Health

The Best Drinks for Your Health

Buzz60 (Feb. 27, 2015) When it comes to health and fitness, there&apos;s lots of talk about what foods to eat, but there are a few liquids that can promote good nutrition. Krystin Goodwin (@krystingoodwin) has the healthiest drinks to boost your health! Video provided by Buzz60
Powered by NewsLook.com
Cherries, Snap Peas and More Tasty Spring Produce

Cherries, Snap Peas and More Tasty Spring Produce

Buzz60 (Feb. 27, 2015) From sweet cherries to sugar snap peas, spring is the peak season for some of the tastiest and healthiest produce. Krystin Goodwin (@Krystingoodwin) has the best seasonal fruits and veggies to spring in to good health! Video provided by Buzz60
Powered by NewsLook.com
The Best Foods to Battle Stress

The Best Foods to Battle Stress

Buzz60 (Feb. 26, 2015) If you&apos;re dealing with anxiety, there are a few foods that can help. Krystin Goodwin (@krystingoodwin) has the best foods to tame stress. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins