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.

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 July 31, 2014 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 July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
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:
from the past week

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